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H α-based star formation rates in and around z ∼ 0.5 EDisCS clusters

Cooper, Jennifer R. and Rudnick, Gregory H. and Brammer, Gabriel G. and Desjardins, Tyler and Mann, Justin L. and Weiner, Benjamin J. and Aragón-Salamanca, Alfonso and De Lucia, Gabriella and Desai, Vandana and Finn, Rose A. and Jablonka, Pascale and Jaffé, Yara L. and Moustakas, John and Spérone-Longin, Damien and Teplitz, Harry I. and Vulcani, Benedetta and Zaritsky, Dennis (2022) H α-based star formation rates in and around z ∼ 0.5 EDisCS clusters. Monthly Notices of the Royal Astronomical Society, 509 (4). pp. 5382-5398. ISSN 0035-8711. doi:10.1093/mnras/stab3184.

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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 α 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 α distributions at similar redshifts but differs from those derived from star formation tracers such as 24 μm. We find that the Hα-derived SFRs for the 67 galaxies with stellar masses greater than the mass-completeness limit of M* > 10^(9.75) M⊙ 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 α emission, 21 galaxies are classified as UVJ-quiescent and may represent a demonstration of the quenching of star formation caught in the act.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Cooper, Jennifer R.0000-0001-6760-5985
Aragón-Salamanca, Alfonso0000-0001-8215-1256
De Lucia, Gabriella0000-0002-6220-9104
Desai, Vandana0000-0002-1340-0543
Finn, Rose A.0000-0001-8518-4862
Jablonka, Pascale0000-0002-9655-1063
Jaffé, Yara L.0000-0003-2150-1130
Moustakas, John0000-0002-2733-4559
Teplitz, Harry I.0000-0002-7064-5424
Vulcani, Benedetta0000-0003-0980-1499
Zaritsky, Dennis0000-0002-5177-727X
Additional Information:© 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model ( Accepted 2021 October 26. Received 2021 October 21; in original form 2021 March 1. Published: 03 November 2021. GR acknowledges support from the National Science Foundation grants AST-1517815, AST-1716690 and NASA Hubble Space Telescope grant HST-GO-12945.001. GR also acknowledges the support of an European Southern Observatory visiting science fellowship. The work in this paper benefited significantly from interaction conducted as part of a team at the International Space Sciences Institute in Bern, Switzerland. JC thanks the Madison & Lila Self Graduate Fellowship at the University of Kansas for financial and professional support. YJ acknowledges financial support from CONICYT PAI (Concurso Nacional de Inserción en la Academia 2017) No. 79170132 and FONDECYT Iniciación 2018 No. 11180558. BV acknowledges financial contribution from the contract ASI-INAF n.2017-14-H.0, from the grant PRIN MIUR 2017 n.20173ML3WW_001 (PI Cimatti) and from the INAF main-stream funding programme (PI Vulcani). We thank Matthew Kirby for his assistance with producing the LDP redshifts that were used in this work. Data Availability: The raw HST data are available through MAST (Program ID 12945). The ground-based redshift catalogue is available in Just et al. 2019 for clusters Cl11138, Cl1227, and Cl1301, while Cl1059 is available in White et al. (2005); DOI - 10.3847/1538-4357/ab44a0. Additional data on derived physical parameters are available in this paper.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
NASA Hubble FellowshipHST-GO-12945.001
European Southern Observatory (ESO)UNSPECIFIED
University of KansasUNSPECIFIED
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)79170132
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)11180558
Agenzia Spaziale Italiana (ASI)2017-14-H.0
Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR)20173ML3WW_001
Istituto Nazionale di Astrofisica (INAF)UNSPECIFIED
Subject Keywords:galaxies: clusters: general –galaxies: evolution –galaxies: star formation
Issue or Number:4
Record Number:CaltechAUTHORS:20220720-386963900
Persistent URL:
Official Citation:Jennifer R Cooper, Gregory H Rudnick, Gabriel G Brammer, Tyler Desjardins, Justin L Mann, Benjamin J Weiner, Alfonso Aragón-Salamanca, Gabriella De Lucia, Vandana Desai, Rose A Finn, Pascale Jablonka, Yara L Jaffé, John Moustakas, Damien Spérone-Longin, Harry I Teplitz, Benedetta Vulcani, Dennis Zaritsky, H α-based star formation rates in and around z ∼ 0.5 EDisCS clusters, Monthly Notices of the Royal Astronomical Society, Volume 509, Issue 4, February 2022, Pages 5382–5398,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115687
Deposited By: Tony Diaz
Deposited On:20 Jul 2022 16:00
Last Modified:20 Jul 2022 16:00

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