The GOGREEN survey: the environmental dependence of the star-forming galaxy main sequence at 1.0 < z <1.5

Research output: Contribution to journalArticlepeer-review

Authors

  • Lyndsay J. Old
  • Michael L. Balogh
  • Remco F. J van der Burg
  • Andrea Biviano
  • Howard K. C. Yee
  • Irene Pintos-Castro
  • Kristi Webb
  • Adam Muzzin
  • Gregory Rudnick
  • Benedetta Vulcani
  • Bianca Poggianti
  • Michael Cooper
  • Dennis Zaritsky
  • Pierluigi Cerulo
  • Gillian Wilson
  • Jeffrey C. C. Chan
  • Chris Lidman
  • Ricardo Demarco
  • Ben Forrest
  • Gabriella De Lucia
  • David Gilbank
  • Egidijus Kukstas
  • Ian G. McCarthy
  • Pascale Jablonka
  • Julie Nantais
  • Allison Noble
  • Andrew M. M. Reeves
  • Heath Shipley

Colleges, School and Institutes

Abstract

We present results on the environmental dependence of the star-forming galaxy main sequence in 11 galaxy cluster fields at 1.0 < z < 1.5 from the Gemini Observations of Galaxies in Rich Early Environments Survey (GOGREEN) survey. We use a homogeneously selected sample of field and cluster galaxies whose membership is derived from dynamical analysis. Using [OII]-derived star formation rates (SFRs), we find that cluster galaxies have suppressed SFRs at fixed stellar mass in comparison to their field counterparts by a factor of 1.4 ± 0.1 (∼3.3σ) across the stellar mass range: 9.0 < log (M*/M) < 11.2. We also find that this modest suppression in the cluster galaxy star-forming main sequence is mass and redshift dependent: the difference between cluster and field increases towards lower stellar masses and lower redshift. When comparing the distribution of cluster and field galaxy SFRs to the star-forming main sequence, we find an overall shift towards lower SFRs in the cluster population, and note the absence of a tail of high SFR galaxies as seen in the field. Given this observed suppression in the cluster galaxy star-forming main sequence, we explore the implications for several scenarios such as formation time differences between cluster and field galaxies, and environmentally induced star formation quenching and associated time-scales.

Bibliographic note

Accepted for publication in MNRAS on February 25 2020

Details

Original languageEnglish
Pages (from-to)5987–6000
Number of pages14
JournalMonthly Notices of the Royal Astronomical Society
Volume493
Issue number4
Early online date4 Mar 2020
Publication statusPublished - Apr 2020

Keywords

  • astro-ph.GA, astro-ph.CO, galaxies: clusters: general, galaxies: evolution