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



Old, Lyndsay J, Balogh, Michael L, van der Burg, Remco FJ, Biviano, Andrea, Yee, Howard KC, Pintos-Castro, Irene, Webb, Kristi, Muzzin, Adam, Rudnick, Gregory, Vulcani, Benedetta
et al (show 19 more authors) (2020) The GOGREEN survey: the environmental dependence of the star-forming galaxy main sequence at 1.0 < z < 1.5. Monthly Notices of the Royal Astronomical Society, 493 (4). pp. 5987-6000.

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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 $\pm$ 0.1 ($\sim3.3\sigma$) across the stellar mass range: $9.0 < \log(M_{*} /M_{\odot}) < 11.2$. 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 timescales.

Item Type: Article
Additional Information: Accepted for publication in MNRAS on February 25 2020, appended erratum accepted in MNRAS on September 17 2020
Uncontrolled Keywords: galaxies: clusters: general, galaxies: evolution
Depositing User: Symplectic Admin
Date Deposited: 15 Sep 2020 09:35
Last Modified: 18 Jan 2023 23:33
DOI: 10.1093/mnras/staa579
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3101261