---
_id: '11507'
abstract:
- lang: eng
text: 'Lyman-α (Lyα) is intrinsically the brightest line emitted from active galaxies.
While it originates from many physical processes, for star-forming galaxies the
intrinsic Lyα luminosity is a direct tracer of the Lyman-continuum (LyC) radiation
produced by the most massive O- and early-type B-stars (M⋆ ≳ 10 M⊙) with lifetimes
of a few Myrs. As such, Lyα luminosity should be an excellent instantaneous star
formation rate (SFR) indicator. However, its resonant nature and susceptibility
to dust as a rest-frame UV photon makes Lyα very hard to interpret due to the
uncertain Lyα escape fraction, fesc, Lyα. Here we explore results from the CAlibrating
LYMan-α with Hα (CALYMHA) survey at z = 2.2, follow-up of Lyα emitters (LAEs)
at z = 2.2 − 2.6 and a z ∼ 0−0.3 compilation of LAEs to directly measure fesc, Lyα
with Hα. We derive a simple empirical relation that robustly retrieves fesc, Lyα
as a function of Lyα rest-frame EW (EW0): fesc,Lyα = 0.0048 EW0[Å] ± 0.05 and
we show that it constrains a well-defined anti-correlation between ionisation
efficiency (ξion) and dust extinction in LAEs. Observed Lyα luminosities and EW0
are easy measurable quantities at high redshift, thus making our relation a practical
tool to estimate intrinsic Lyα and LyC luminosities under well controlled and
simple assumptions. Our results allow observed Lyα luminosities to be used to
compute SFRs for LAEs at z ∼ 0−2.6 within ±0.2 dex of the Hα dust corrected SFRs.
We apply our empirical SFR(Lyα,EW0) calibration to several sources at z ≥ 2.6
to find that star-forming LAEs have SFRs typically ranging from 0.1 to 20 M⊙ yr−1
and that our calibration might be even applicable for the most luminous LAEs within
the epoch of re-ionisation. Our results imply high ionisation efficiencies (log10[ξion/Hz erg−1]
= 25.4−25.6) and low dust content in LAEs across cosmic time, and will be easily
tested with future observations with JWST which can obtain Hα and Hβ measurements
for high-redshift LAEs.'
acknowledgement: We thank the anonymous referees for multiple comments and suggestions
which have improved the manuscript. JM acknowledges the support of a Huygens PhD
fellowship from Leiden University. We have benefited greatly from the publicly available
programming language PYTHON, including the NUMPY & SCIPY (Van Der Walt et al. 2011;
Jones et al. 2001), MATPLOTLIB (Hunter 2007) and ASTROPY (Astropy Collaboration
2013) packages, and the TOPCAT analysis program (Taylor 2013). The results and samples
of LAEs used for this paper are publicly available (see e.g. Sobral et al. 2017,
2018a) and we also provide the toy model used as a PYTHON script.
article_number: A157
article_processing_charge: No
article_type: original
author:
- first_name: David
full_name: Sobral, David
last_name: Sobral
- first_name: Jorryt J
full_name: Matthee, Jorryt J
id: 7439a258-f3c0-11ec-9501-9df22fe06720
last_name: Matthee
orcid: 0000-0003-2871-127X
citation:
ama: 'Sobral D, Matthee JJ. Predicting Lyα escape fractions with a simple observable:
Lyα in emission as an empirically calibrated star formation rate indicator. Astronomy
& Astrophysics. 2019;623. doi:10.1051/0004-6361/201833075'
apa: 'Sobral, D., & Matthee, J. J. (2019). Predicting Lyα escape fractions with
a simple observable: Lyα in emission as an empirically calibrated star formation
rate indicator. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/201833075'
chicago: 'Sobral, David, and Jorryt J Matthee. “Predicting Lyα Escape Fractions
with a Simple Observable: Lyα in Emission as an Empirically Calibrated Star Formation
Rate Indicator.” Astronomy & Astrophysics. EDP Sciences, 2019. https://doi.org/10.1051/0004-6361/201833075.'
ieee: 'D. Sobral and J. J. Matthee, “Predicting Lyα escape fractions with a simple
observable: Lyα in emission as an empirically calibrated star formation rate indicator,”
Astronomy & Astrophysics, vol. 623. EDP Sciences, 2019.'
ista: 'Sobral D, Matthee JJ. 2019. Predicting Lyα escape fractions with a simple
observable: Lyα in emission as an empirically calibrated star formation rate indicator.
Astronomy & Astrophysics. 623, A157.'
mla: 'Sobral, David, and Jorryt J. Matthee. “Predicting Lyα Escape Fractions with
a Simple Observable: Lyα in Emission as an Empirically Calibrated Star Formation
Rate Indicator.” Astronomy & Astrophysics, vol. 623, A157, EDP Sciences,
2019, doi:10.1051/0004-6361/201833075.'
short: D. Sobral, J.J. Matthee, Astronomy & Astrophysics 623 (2019).
date_created: 2022-07-06T11:08:16Z
date_published: 2019-03-26T00:00:00Z
date_updated: 2022-07-19T09:37:20Z
day: '26'
doi: 10.1051/0004-6361/201833075
extern: '1'
external_id:
arxiv:
- '1803.08923'
intvolume: ' 623'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
- 'galaxies: high-redshift / galaxies: star formation / galaxies: statistics / galaxies:
evolution / galaxies: formation / galaxies: ISM'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1803.08923
month: '03'
oa: 1
oa_version: Published Version
publication: Astronomy & Astrophysics
publication_identifier:
eissn:
- 1432-0746
issn:
- 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Predicting Lyα escape fractions with a simple observable: Lyα in emission
as an empirically calibrated star formation rate indicator'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 623
year: '2019'
...
---
_id: '11514'
abstract:
- lang: eng
text: We discuss the nature and physical properties of gas-mass selected galaxies
in the ALMA spectroscopic survey (ASPECS) of the Hubble Ultra Deep Field (HUDF).
We capitalize on the deep optical integral-field spectroscopy from the Multi Unit
Spectroscopic Explorer (MUSE) HUDF Survey and multiwavelength data to uniquely
associate all 16 line emitters, detected in the ALMA data without preselection,
with rotational transitions of carbon monoxide (CO). We identify 10 as CO(2–1)
at 1 < z < 2, 5 as CO(3–2) at 2 < z < 3, and 1 as CO(4–3) at z = 3.6. Using the
MUSE data as a prior, we identify two additional CO(2–1) emitters, increasing
the total sample size to 18. We infer metallicities consistent with (super-)solar
for the CO-detected galaxies at z ≤ 1.5, motivating our choice of a Galactic conversion
factor between CO luminosity and molecular gas mass for these galaxies. Using
deep Chandra imaging of the HUDF, we determine an X-ray AGN fraction of 20% and
60% among the CO emitters at z ∼ 1.4 and z ∼ 2.6, respectively. Being a CO-flux-limited
survey, ASPECS-LP detects molecular gas in galaxies on, above, and below the main
sequence (MS) at z ∼ 1.4. For stellar masses ≥1010 (1010.5) ${M}_{\odot }$, we
detect about 40% (50%) of all galaxies in the HUDF at 1 < z < 2 (2 < z < 3). The
combination of ALMA and MUSE integral-field spectroscopy thus enables an unprecedented
view of MS galaxies during the peak of galaxy formation.
acknowledgement: "We are grateful to the referee for providing a constructive report.
L.A.B. wants to thank Madusha L.P. Gunawardhana for her help with platefit. Based
on observations collected at the European Southern Observatory under ESO programme(s):
094.A-2089(B), 095.A-0010(A), 096.A-0045(A), and 096.A-0045(B). This paper makes
use of the following ALMA data: ADS/JAO.ALMA#2016.1.00324.L. ALMA is a partnership
of ESO (representing its member states), NSF (USA) and NINS (Japan), together with
NRC (Canada), NSC and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation
with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO,
and NAOJ. The National Radio Astronomy Observatory is a facility of the National
Science Foundation operated under cooperative agreement by Associated Universities,
Inc.\r\n\r\n\"Este trabajo contó con el apoyo de CONICYT+Programa de Astronomía+
Fondo CHINA-CONICYT\" J.G-L. acknowledges partial support from ALMA-CONICYT project
31160033. F.E.B. acknowledges support from CONICYT grant Basal AFB-170002 (FEB),
and the Ministry of Economy, Development, and Tourism's Millennium Science Initiative
through grant IC120009, awarded to The Millennium Institute of Astrophysics, MAS
(FEB). J.B. acknowledges support by Fundação para a Ciência e a Tecnologia (FCT)
through national funds (UID/FIS/04434/2013) and Investigador FCT contract IF/01654/2014/CP1215/CT0003.,
and by FEDER through COMPETE2020 (POCI-01-0145-FEDER-007672). T.D-S. acknowledges
support from ALMA-CONYCIT project 31130005 and FONDECYT project 1151239. J.H. acknowledges
support of the VIDI research programme with project number 639.042.611, which is
(partly) financed by the Netherlands Organization for Scientific Research (NWO).
D.R. acknowledges support from the National Science Foundation under grant No. AST-1614213.
I.R.S. acknowledges support from the ERC Advanced Grant DUSTYGAL (321334) and STFC
(ST/P000541/1)\r\n\r\nWork on Gnuastro has been funded by the Japanese MEXT scholarship
and its Grant-in-Aid for Scientific Research (21244012, 24253003), the ERC advanced
grant 339659-MUSICOS, European Union's Horizon 2020 research and innovation programme
under Marie Sklodowska-Curie grant agreement No. 721463 to the SUNDIAL ITN, and
from the Spanish MINECO under grant No. AYA2016-76219-P."
article_number: '140'
article_processing_charge: No
article_type: original
author:
- first_name: Leindert A.
full_name: Boogaard, Leindert A.
last_name: Boogaard
- first_name: Roberto
full_name: Decarli, Roberto
last_name: Decarli
- first_name: Jorge
full_name: González-López, Jorge
last_name: González-López
- first_name: Paul
full_name: van der Werf, Paul
last_name: van der Werf
- first_name: Fabian
full_name: Walter, Fabian
last_name: Walter
- first_name: Rychard
full_name: Bouwens, Rychard
last_name: Bouwens
- first_name: Manuel
full_name: Aravena, Manuel
last_name: Aravena
- first_name: Chris
full_name: Carilli, Chris
last_name: Carilli
- first_name: Franz Erik
full_name: Bauer, Franz Erik
last_name: Bauer
- first_name: Jarle
full_name: Brinchmann, Jarle
last_name: Brinchmann
- first_name: Thierry
full_name: Contini, Thierry
last_name: Contini
- first_name: Pierre
full_name: Cox, Pierre
last_name: Cox
- first_name: Elisabete
full_name: da Cunha, Elisabete
last_name: da Cunha
- first_name: Emanuele
full_name: Daddi, Emanuele
last_name: Daddi
- first_name: Tanio
full_name: Díaz-Santos, Tanio
last_name: Díaz-Santos
- first_name: Jacqueline
full_name: Hodge, Jacqueline
last_name: Hodge
- first_name: Hanae
full_name: Inami, Hanae
last_name: Inami
- first_name: Rob
full_name: Ivison, Rob
last_name: Ivison
- first_name: Michael
full_name: Maseda, Michael
last_name: Maseda
- first_name: Jorryt J
full_name: Matthee, Jorryt J
id: 7439a258-f3c0-11ec-9501-9df22fe06720
last_name: Matthee
orcid: 0000-0003-2871-127X
- first_name: Pascal
full_name: Oesch, Pascal
last_name: Oesch
- first_name: Gergö
full_name: Popping, Gergö
last_name: Popping
- first_name: Dominik
full_name: Riechers, Dominik
last_name: Riechers
- first_name: Joop
full_name: Schaye, Joop
last_name: Schaye
- first_name: Sander
full_name: Schouws, Sander
last_name: Schouws
- first_name: Ian
full_name: Smail, Ian
last_name: Smail
- first_name: Axel
full_name: Weiss, Axel
last_name: Weiss
- first_name: Lutz
full_name: Wisotzki, Lutz
last_name: Wisotzki
- first_name: Roland
full_name: Bacon, Roland
last_name: Bacon
- first_name: Paulo C.
full_name: Cortes, Paulo C.
last_name: Cortes
- first_name: Hans-Walter
full_name: Rix, Hans-Walter
last_name: Rix
- first_name: Rachel S.
full_name: Somerville, Rachel S.
last_name: Somerville
- first_name: Mark
full_name: Swinbank, Mark
last_name: Swinbank
- first_name: Jeff
full_name: Wagg, Jeff
last_name: Wagg
citation:
ama: 'Boogaard LA, Decarli R, González-López J, et al. The ALMA spectroscopic survey
in the HUDF: Nature and physical properties of gas-mass selected galaxies using
MUSE spectroscopy. The Astrophysical Journal. 2019;882(2). doi:10.3847/1538-4357/ab3102'
apa: 'Boogaard, L. A., Decarli, R., González-López, J., van der Werf, P., Walter,
F., Bouwens, R., … Wagg, J. (2019). The ALMA spectroscopic survey in the HUDF:
Nature and physical properties of gas-mass selected galaxies using MUSE spectroscopy.
The Astrophysical Journal. IOP Publishing. https://doi.org/10.3847/1538-4357/ab3102'
chicago: 'Boogaard, Leindert A., Roberto Decarli, Jorge González-López, Paul van
der Werf, Fabian Walter, Rychard Bouwens, Manuel Aravena, et al. “The ALMA Spectroscopic
Survey in the HUDF: Nature and Physical Properties of Gas-Mass Selected Galaxies
Using MUSE Spectroscopy.” The Astrophysical Journal. IOP Publishing, 2019.
https://doi.org/10.3847/1538-4357/ab3102.'
ieee: 'L. A. Boogaard et al., “The ALMA spectroscopic survey in the HUDF:
Nature and physical properties of gas-mass selected galaxies using MUSE spectroscopy,”
The Astrophysical Journal, vol. 882, no. 2. IOP Publishing, 2019.'
ista: 'Boogaard LA, Decarli R, González-López J, van der Werf P, Walter F, Bouwens
R, Aravena M, Carilli C, Bauer FE, Brinchmann J, Contini T, Cox P, da Cunha E,
Daddi E, Díaz-Santos T, Hodge J, Inami H, Ivison R, Maseda M, Matthee JJ, Oesch
P, Popping G, Riechers D, Schaye J, Schouws S, Smail I, Weiss A, Wisotzki L, Bacon
R, Cortes PC, Rix H-W, Somerville RS, Swinbank M, Wagg J. 2019. The ALMA spectroscopic
survey in the HUDF: Nature and physical properties of gas-mass selected galaxies
using MUSE spectroscopy. The Astrophysical Journal. 882(2), 140.'
mla: 'Boogaard, Leindert A., et al. “The ALMA Spectroscopic Survey in the HUDF:
Nature and Physical Properties of Gas-Mass Selected Galaxies Using MUSE Spectroscopy.”
The Astrophysical Journal, vol. 882, no. 2, 140, IOP Publishing, 2019,
doi:10.3847/1538-4357/ab3102.'
short: L.A. Boogaard, R. Decarli, J. González-López, P. van der Werf, F. Walter,
R. Bouwens, M. Aravena, C. Carilli, F.E. Bauer, J. Brinchmann, T. Contini, P.
Cox, E. da Cunha, E. Daddi, T. Díaz-Santos, J. Hodge, H. Inami, R. Ivison, M.
Maseda, J.J. Matthee, P. Oesch, G. Popping, D. Riechers, J. Schaye, S. Schouws,
I. Smail, A. Weiss, L. Wisotzki, R. Bacon, P.C. Cortes, H.-W. Rix, R.S. Somerville,
M. Swinbank, J. Wagg, The Astrophysical Journal 882 (2019).
date_created: 2022-07-06T13:31:35Z
date_published: 2019-09-11T00:00:00Z
date_updated: 2022-07-19T09:50:55Z
day: '11'
doi: 10.3847/1538-4357/ab3102
extern: '1'
external_id:
arxiv:
- '1903.09167'
intvolume: ' 882'
issue: '2'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1903.09167
month: '09'
oa: 1
oa_version: Preprint
publication: The Astrophysical Journal
publication_identifier:
eissn:
- 1538-4357
issn:
- 0004-637X
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'The ALMA spectroscopic survey in the HUDF: Nature and physical properties
of gas-mass selected galaxies using MUSE spectroscopy'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 882
year: '2019'
...
---
_id: '11516'
abstract:
- lang: eng
text: The well-known quasar SDSS J095253.83+011421.9 (J0952+0114) at z = 3.02 has
one of the most peculiar spectra discovered so far, showing the presence of narrow
Lyα and broad metal emission lines. Although recent studies have suggested that
a proximate damped Lyα absorption (PDLA) system causes this peculiar spectrum,
the origin of the gas associated with the PDLA is unknown. Here we report the
results of observations with the Multi Unit Spectroscopic Explorer (MUSE) that
reveal a new giant (≈100 physical kpc) Lyα nebula. The detailed analysis of the
Lyα velocity, velocity dispersion, and surface brightness profiles suggests that
the J0952+0114 Lyα nebula shares similar properties with other QSO nebulae previously
detected with MUSE, implying that the PDLA in J0952+0144 is covering only a small
fraction of the solid angle of the QSO emission. We also detected bright and spectrally
narrow C iv λ1550 and He ii λ1640 extended emission around J0952+0114 with velocity
centroids similar to the peak of the extended and central narrow Lyα emission.
The presence of a peculiarly bright, unresolved, and relatively broad He ii λ1640
emission in the central region at exactly the same PDLA redshift hints at the
possibility that the PDLA originates in a clumpy outflow with a bulk velocity
of about 500 km s−1. The smaller velocity dispersion of the large-scale Lyα emission
suggests that the high-speed outflow is confined to the central region. Lastly,
the derived spatially resolved He ii/Lyα and C iv/Lyα maps show a positive gradient
with the distance to the QSO, hinting at a non-homogeneous distribution of the
ionization parameter.
acknowledgement: We thank Lutz Wisotzki for stimulating discussions. This work is
based on observations taken at ESO/VLT in Paranal and we would like to thank the
ESO staff for their assistance and support during the MUSE GTO campaigns. This work
was supported by the Swiss National Science Foundation. This research made use of
Astropy, a community-developed core PYTHON package for astronomy (Astropy Collaboration
et al. 2013), NumPy and SciPy (Oliphant 2007), Matplotlib (Hunter 2007), IPython
(Perez & Granger 2007), and of the NASA Astrophysics Data System Bibliographic Services.
S.C. and G.P. gratefully acknowledge support from Swiss National Science Foundation
grant PP00P2−163824. A.F. acknowledges support from the ERC via Advanced Grant under
grants agreement no. 339659-MUSICOS. J.B. acknowledges support by FCT/MCTES through
national funds by grant UID/FIS/04434/2019 and through Investigador FCT Contract
No. IF/01654/2014/CP1215/CT0003. S.D.J. is supported by a NASA Hubble Fellowship
(HST-HF2-51375.001-A). T.N. acknowledges the Nederlandse Organisatie voor Wetenschappelijk
Onderzoek (NWO) top grant TOP1.16.057.
article_number: '47'
article_processing_charge: No
article_type: original
author:
- first_name: Raffaella Anna
full_name: Marino, Raffaella Anna
last_name: Marino
- first_name: Sebastiano
full_name: Cantalupo, Sebastiano
last_name: Cantalupo
- first_name: Gabriele
full_name: Pezzulli, Gabriele
last_name: Pezzulli
- first_name: Simon J.
full_name: Lilly, Simon J.
last_name: Lilly
- first_name: Sofia
full_name: Gallego, Sofia
last_name: Gallego
- first_name: Ruari
full_name: Mackenzie, Ruari
last_name: Mackenzie
- first_name: Jorryt J
full_name: Matthee, Jorryt J
id: 7439a258-f3c0-11ec-9501-9df22fe06720
last_name: Matthee
orcid: 0000-0003-2871-127X
- first_name: Jarle
full_name: Brinchmann, Jarle
last_name: Brinchmann
- first_name: Nicolas
full_name: Bouché, Nicolas
last_name: Bouché
- first_name: Anna
full_name: Feltre, Anna
last_name: Feltre
- first_name: Sowgat
full_name: Muzahid, Sowgat
last_name: Muzahid
- first_name: Ilane
full_name: Schroetter, Ilane
last_name: Schroetter
- first_name: Sean D.
full_name: Johnson, Sean D.
last_name: Johnson
- first_name: Themiya
full_name: Nanayakkara, Themiya
last_name: Nanayakkara
citation:
ama: Marino RA, Cantalupo S, Pezzulli G, et al. A giant Lyα nebula and a small-scale
clumpy outflow in the system of the exotic quasar J0952+0114 unveiled by MUSE.
The Astrophysical Journal. 2019;880(1). doi:10.3847/1538-4357/ab2881
apa: Marino, R. A., Cantalupo, S., Pezzulli, G., Lilly, S. J., Gallego, S., Mackenzie,
R., … Nanayakkara, T. (2019). A giant Lyα nebula and a small-scale clumpy outflow
in the system of the exotic quasar J0952+0114 unveiled by MUSE. The Astrophysical
Journal. IOP Publishing. https://doi.org/10.3847/1538-4357/ab2881
chicago: Marino, Raffaella Anna, Sebastiano Cantalupo, Gabriele Pezzulli, Simon
J. Lilly, Sofia Gallego, Ruari Mackenzie, Jorryt J Matthee, et al. “A Giant Lyα
Nebula and a Small-Scale Clumpy Outflow in the System of the Exotic Quasar J0952+0114
Unveiled by MUSE.” The Astrophysical Journal. IOP Publishing, 2019. https://doi.org/10.3847/1538-4357/ab2881.
ieee: R. A. Marino et al., “A giant Lyα nebula and a small-scale clumpy outflow
in the system of the exotic quasar J0952+0114 unveiled by MUSE,” The Astrophysical
Journal, vol. 880, no. 1. IOP Publishing, 2019.
ista: Marino RA, Cantalupo S, Pezzulli G, Lilly SJ, Gallego S, Mackenzie R, Matthee
JJ, Brinchmann J, Bouché N, Feltre A, Muzahid S, Schroetter I, Johnson SD, Nanayakkara
T. 2019. A giant Lyα nebula and a small-scale clumpy outflow in the system of
the exotic quasar J0952+0114 unveiled by MUSE. The Astrophysical Journal. 880(1),
47.
mla: Marino, Raffaella Anna, et al. “A Giant Lyα Nebula and a Small-Scale Clumpy
Outflow in the System of the Exotic Quasar J0952+0114 Unveiled by MUSE.” The
Astrophysical Journal, vol. 880, no. 1, 47, IOP Publishing, 2019, doi:10.3847/1538-4357/ab2881.
short: R.A. Marino, S. Cantalupo, G. Pezzulli, S.J. Lilly, S. Gallego, R. Mackenzie,
J.J. Matthee, J. Brinchmann, N. Bouché, A. Feltre, S. Muzahid, I. Schroetter,
S.D. Johnson, T. Nanayakkara, The Astrophysical Journal 880 (2019).
date_created: 2022-07-06T13:50:33Z
date_published: 2019-07-24T00:00:00Z
date_updated: 2022-08-18T10:20:18Z
day: '24'
doi: 10.3847/1538-4357/ab2881
extern: '1'
external_id:
arxiv:
- '1906.06347'
intvolume: ' 880'
issue: '1'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1906.06347
month: '07'
oa: 1
oa_version: Preprint
publication: The Astrophysical Journal
publication_identifier:
eissn:
- 1538-4357
issn:
- 0004-637X
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: A giant Lyα nebula and a small-scale clumpy outflow in the system of the exotic
quasar J0952+0114 unveiled by MUSE
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 880
year: '2019'
...
---
_id: '11515'
abstract:
- lang: eng
text: We present new deep ALMA and Hubble Space Telescope (HST)/WFC3 observations
of MASOSA and VR7, two luminous Lyα emitters (LAEs) at z = 6.5, for which the
UV continuum levels differ by a factor of four. No IR dust continuum emission
is detected in either, indicating little amounts of obscured star formation and/or
high dust temperatures. MASOSA, with a UV luminosity M1500 = −20.9, compact size,
and very high Lyα ${\mathrm{EW}}_{0}\approx 145\,\mathring{\rm A} $, is undetected
in [C ii] to a limit of L[C ii] < 2.2 × 107 L⊙, implying a metallicity Z ≲ 0.07
Z⊙. Intriguingly, our HST data indicate a red UV slope β = −1.1 ± 0.7, at odds
with the low dust content. VR7, which is a bright (M1500 = −22.4) galaxy with
moderate color (β = −1.4 ± 0.3) and Lyα EW0 = 34 Å, is clearly detected in [C
ii] emission (S/N = 15). VR7's rest-frame UV morphology can be described by two
components separated by ≈1.5 kpc and is globally more compact than the [C ii]
emission. The global [C ii]/UV ratio indicates Z ≈ 0.2 Z⊙, but there are large
variations in the UV/[C ii] ratio on kiloparsec scales. We also identify diffuse,
possibly outflowing, [C ii]-emitting gas at ≈100 km s−1 with respect to the peak.
VR7 appears to be assembling its components at a slightly more evolved stage than
other luminous LAEs, with outflows already shaping its direct environment at z
∼ 7. Our results further indicate that the global [C ii]−UV relation steepens
at SFR < 30 M⊙ yr−1, naturally explaining why the [C ii]/UV ratio is anticorrelated
with Lyα EW in many, but not all, observed LAEs.
acknowledgement: 'We thank the anonymous referee for constructive comments and suggestions.
We thank Max Gronke for comments on an earlier version of this paper. L.V. acknowledges
funding from the European Union’s Horizon 2020 research and innovation program under
the Marie Skłodowska-Curie grant agreement No. 746119. This paper makes use of the
following ALMA data: ADS/JAO.ALMA#2017.1.01451.S. ALMA is a partnership of ESO (representing
its member states), NSF (USA), and NINS (Japan), together with NRC (Canada), NSC
and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic
of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. Based
on observations obtained with the Very Large Telescope, programs 294.A-5018, 097.A-0943,
and 99.A-0462. Based on observations made with the NASA/ESA Hubble Space Telescope,
obtained (from the Data Archive) at the Space Telescope Science Institute, which
is operated by the Association of Universities for Research in Astronomy, Inc.,
under NASA contract NAS 5-26555. These observations are associated with program
No. 14699.'
article_number: '124'
article_processing_charge: No
article_type: original
author:
- first_name: Jorryt J
full_name: Matthee, Jorryt J
id: 7439a258-f3c0-11ec-9501-9df22fe06720
last_name: Matthee
orcid: 0000-0003-2871-127X
- first_name: D.
full_name: Sobral, D.
last_name: Sobral
- first_name: L. A.
full_name: Boogaard, L. A.
last_name: Boogaard
- first_name: H.
full_name: Röttgering, H.
last_name: Röttgering
- first_name: L.
full_name: Vallini, L.
last_name: Vallini
- first_name: A.
full_name: Ferrara, A.
last_name: Ferrara
- first_name: A.
full_name: Paulino-Afonso, A.
last_name: Paulino-Afonso
- first_name: F.
full_name: Boone, F.
last_name: Boone
- first_name: D.
full_name: Schaerer, D.
last_name: Schaerer
- first_name: B.
full_name: Mobasher, B.
last_name: Mobasher
citation:
ama: Matthee JJ, Sobral D, Boogaard LA, et al. Resolved UV and [C ii] structures
of luminous galaxies within the epoch of reionization. The Astrophysical Journal.
2019;881(2). doi:10.3847/1538-4357/ab2f81
apa: Matthee, J. J., Sobral, D., Boogaard, L. A., Röttgering, H., Vallini, L., Ferrara,
A., … Mobasher, B. (2019). Resolved UV and [C ii] structures of luminous galaxies
within the epoch of reionization. The Astrophysical Journal. IOP Publishing.
https://doi.org/10.3847/1538-4357/ab2f81
chicago: Matthee, Jorryt J, D. Sobral, L. A. Boogaard, H. Röttgering, L. Vallini,
A. Ferrara, A. Paulino-Afonso, F. Boone, D. Schaerer, and B. Mobasher. “Resolved
UV and [C Ii] Structures of Luminous Galaxies within the Epoch of Reionization.”
The Astrophysical Journal. IOP Publishing, 2019. https://doi.org/10.3847/1538-4357/ab2f81.
ieee: J. J. Matthee et al., “Resolved UV and [C ii] structures of luminous
galaxies within the epoch of reionization,” The Astrophysical Journal,
vol. 881, no. 2. IOP Publishing, 2019.
ista: Matthee JJ, Sobral D, Boogaard LA, Röttgering H, Vallini L, Ferrara A, Paulino-Afonso
A, Boone F, Schaerer D, Mobasher B. 2019. Resolved UV and [C ii] structures of
luminous galaxies within the epoch of reionization. The Astrophysical Journal.
881(2), 124.
mla: Matthee, Jorryt J., et al. “Resolved UV and [C Ii] Structures of Luminous Galaxies
within the Epoch of Reionization.” The Astrophysical Journal, vol. 881,
no. 2, 124, IOP Publishing, 2019, doi:10.3847/1538-4357/ab2f81.
short: J.J. Matthee, D. Sobral, L.A. Boogaard, H. Röttgering, L. Vallini, A. Ferrara,
A. Paulino-Afonso, F. Boone, D. Schaerer, B. Mobasher, The Astrophysical Journal
881 (2019).
date_created: 2022-07-06T13:38:15Z
date_published: 2019-08-21T00:00:00Z
date_updated: 2022-08-18T10:19:48Z
day: '21'
doi: 10.3847/1538-4357/ab2f81
extern: '1'
external_id:
arxiv:
- '1903.08171'
intvolume: ' 881'
issue: '2'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1903.08171
month: '08'
oa: 1
oa_version: Preprint
publication: The Astrophysical Journal
publication_identifier:
eissn:
- 1538-4357
issn:
- 0004-637X
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: Resolved UV and [C ii] structures of luminous galaxies within the epoch of
reionization
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 881
year: '2019'
...
---
_id: '11517'
abstract:
- lang: eng
text: To understand star formation in galaxies, we investigate the star formation
rate (SFR) surface density (ΣSFR) profiles for galaxies, based on a well-defined
sample of 976 star-forming MaNGA galaxies. We find that the typical ΣSFR profiles
within 1.5Re of normal SF galaxies can be well described by an exponential function
for different stellar mass intervals, while the sSFR profile shows positive gradients,
especially for more massive SF galaxies. This is due to the more pronounced central
cores or bulges rather than the onset of a `quenching' process. While galaxies
that lie significantly above (or below) the star formation main sequence (SFMS)
show overall an elevation (or suppression) of ΣSFR at all radii, this central
elevation (or suppression) is more pronounced in more massive galaxies. The degree
of central enhancement and suppression is quite symmetric, suggesting that both
the elevation and suppression of star formation are following the same physical
processes. Furthermore, we find that the dispersion in ΣSFR within and across
the population is found to be tightly correlated with the inferred gas depletion
time, whether based on the stellar surface mass density or the orbital dynamical
time. This suggests that we are seeing the response of a simple gas-regulator
system to variations in the accretion rate. This is explored using a heuristic
model that can quantitatively explain the dependence of σ(ΣSFR) on gas depletion
timescale. Variations in accretion rate are progressively more damped out in regions
of low star-formation efficiency leading to a reduced amplitude of variations
in star-formation.
acknowledgement: "We are grateful to the anonymous referee for their thoughtful and
constructive review of the paper and their several suggestions (including the analysis
of Section 3.4), which have improved the paper. This research has been supported
by the Swiss National Science Foundation.\r\n\r\nFunding for the Sloan Digital Sky
Survey IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department
of Energy Office of Science, and the Participating Institutions. SDSS-IV acknowledges
support and resources from the Center for High-Performance Computing at the University
of Utah. The SDSS website is www.sdss.org.\r\n\r\nSDSS-IV is managed by the Astrophysical
Research Consortium for the Participating Institutions of the SDSS Collaboration,
including the Brazilian Participation Group, the Carnegie Institution for Science,
Carnegie Mellon University, the Chilean Participation Group, the French Participation
Group, Harvard-Smithsonian Center for Astrophysics, Instituto de Astrofísica de
Canarias, the Johns Hopkins University, Kavli Institute for the Physics and Mathematics
of the Universe (IPMU)/University of Tokyo, Lawrence Berkeley National Laboratory,
Leibniz Institut für Astrophysik Potsdam (AIP), Max-Planck-Institut für Astronomie
(MPIA Heidelberg), Max-Planck-Institut für Astrophysik (MPA Garching), Max-Planck-Institut
für Extraterrestrische Physik (MPE), National Astronomical Observatory of China,
New Mexico State University, New York University, University of Notre Dame, Observatário
Nacional/MCTI, the Ohio State University, Pennsylvania State University, Shanghai
Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional
Autónoma de México, University of Arizona, University of Colorado Boulder, University
of Oxford, University of Portsmouth, University of Utah, University of Virginia,
University of Washington, University of Wisconsin, Vanderbilt University, and Yale
University"
article_number: '132'
article_processing_charge: No
article_type: original
author:
- first_name: Enci
full_name: Wang, Enci
last_name: Wang
- first_name: Simon J.
full_name: Lilly, Simon J.
last_name: Lilly
- first_name: Gabriele
full_name: Pezzulli, Gabriele
last_name: Pezzulli
- first_name: Jorryt J
full_name: Matthee, Jorryt J
id: 7439a258-f3c0-11ec-9501-9df22fe06720
last_name: Matthee
orcid: 0000-0003-2871-127X
citation:
ama: Wang E, Lilly SJ, Pezzulli G, Matthee JJ. On the elevation and suppression
of star formation within galaxies. The Astrophysical Journal. 2019;877(2).
doi:10.3847/1538-4357/ab1c5b
apa: Wang, E., Lilly, S. J., Pezzulli, G., & Matthee, J. J. (2019). On the elevation
and suppression of star formation within galaxies. The Astrophysical Journal.
IOP Publishing. https://doi.org/10.3847/1538-4357/ab1c5b
chicago: Wang, Enci, Simon J. Lilly, Gabriele Pezzulli, and Jorryt J Matthee. “On
the Elevation and Suppression of Star Formation within Galaxies.” The Astrophysical
Journal. IOP Publishing, 2019. https://doi.org/10.3847/1538-4357/ab1c5b.
ieee: E. Wang, S. J. Lilly, G. Pezzulli, and J. J. Matthee, “On the elevation and
suppression of star formation within galaxies,” The Astrophysical Journal,
vol. 877, no. 2. IOP Publishing, 2019.
ista: Wang E, Lilly SJ, Pezzulli G, Matthee JJ. 2019. On the elevation and suppression
of star formation within galaxies. The Astrophysical Journal. 877(2), 132.
mla: Wang, Enci, et al. “On the Elevation and Suppression of Star Formation within
Galaxies.” The Astrophysical Journal, vol. 877, no. 2, 132, IOP Publishing,
2019, doi:10.3847/1538-4357/ab1c5b.
short: E. Wang, S.J. Lilly, G. Pezzulli, J.J. Matthee, The Astrophysical Journal
877 (2019).
date_created: 2022-07-07T08:38:24Z
date_published: 2019-06-04T00:00:00Z
date_updated: 2022-08-18T10:19:08Z
day: '04'
doi: 10.3847/1538-4357/ab1c5b
extern: '1'
external_id:
arxiv:
- '1901.10276'
intvolume: ' 877'
issue: '2'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1901.10276
month: '06'
oa: 1
oa_version: Preprint
publication: The Astrophysical Journal
publication_identifier:
eissn:
- 1538-4357
issn:
- 0004-637X
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: On the elevation and suppression of star formation within galaxies
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 877
year: '2019'
...