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  4. H alpha-based star formation rates in and around z similar to 0.5 EDisCS clusters
 
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research article

H alpha-based star formation rates in and around z similar to 0.5 EDisCS clusters

Cooper, Jennifer R.
•
Rudnick, Gregory H.
•
Brammer, Gabriel G.
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February 1, 2022
Monthly Notices Of The Royal Astronomical Society

We investigate the role of environment on star formation rates (SFRs) of galaxies at various cosmic densities in well-studied clusters. We present the star-forming main sequence for 163 galaxies in four EDisCS clusters in the range 0.4 < z < 0.7. We use Hubble Space Telescope/Wide Field Camera 3 observations of the H alpha emission line to span three distinct local environments: the cluster core, infall region, and external field galaxies. The main sequence defined from our observations is consistent with other published H adistributions at similar redshifts but differs from those derived from star formation tracers such as 24 mu m. We find that the Ha-derived SFRs for the 67 galaxies with stellar masses greater than the mass-completeness limit of M-* > 10(9.75) M-circle dot show little dependence on environment. At face value, the similarities in the SFR distributions in the three environments may indicate that the process of finally shutting down star formation is rapid, however, the depth of our data and size of our sample make it difficult to conclusively test this scenario. Despite having significant H alpha emission, 21 galaxies are classified as UVJ-quiescent and may represent a demonstration of the quenching of star formation caught in the act.

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Type
research article
DOI
10.1093/mnras/stab3184
Web of Science ID

WOS:000780137000051

Author(s)
Cooper, Jennifer R.
•
Rudnick, Gregory H.
•
Brammer, Gabriel G.
•
Desjardins, Tyler
•
Mann, Justin L.
•
Weiner, Benjamin J.
•
Aragon-Salamanca, Alfonso
•
De Lucia, Gabriella
•
Desai, Vandana
•
Finn, Rose A.
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Date Issued

2022-02-01

Publisher

OXFORD UNIV PRESS

Published in
Monthly Notices Of The Royal Astronomical Society
Volume

509

Issue

4

Start page

5382

End page

5398

Subjects

Astronomy & Astrophysics

•

galaxies: clusters: general

•

galaxies: evolution

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galaxies: star formation

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lens-amplified survey

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post-starburst galaxies

•

stellar mass

•

formation histories

•

forming galaxies

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red sequence

•

environmental dependence

•

velocity dispersions

•

quiescent galaxies

•

main-sequence

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LASTRO  
Available on Infoscience
May 23, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/188134
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