Quantifying the suppression of the (un)-obscured star formation in galaxy cluster cores at 0.2≲ z ≲0.9

L. Rodríguez-Muñoz, G. Rodighiero, C. Mancini, P. G. Pérez-González, T. D. Rawle, E. Egami, A. Mercurio, P. Rosati, A. Puglisi, A. Franceschini, I. Balestra, I. Baronchelli, A. Biviano, H. Ebeling, A. C. Edge, A. F.M. Enia, C. Grillo, C. P. Haines, E. Iani, T. JonesM. Nonino, I. Valtchanov, B. Vulcani, M. Zemcov

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We quantify the star formation (SF) in the inner cores (R/R200 ≤0.3) of 24 massive galaxy clusters at 0.2≲ z ≲0.9 observed by the Herschel Lensing Survey and the Cluster Lensing and Supernova survey with Hubble. These programmes, covering the rest-frame ultraviolet to far-infrared regimes, allow us to accurately characterize stellar mass-limited (M∗> 1010 M·) samples of star-forming cluster members (not)-detected in the mid- and/or far-infrared. We release the catalogues with the photometry, photometric redshifts, and physical properties of these samples. We also quantify the SF displayed by comparable field samples from the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey. We find that in intermediate-z cluster cores, the SF activity is suppressed with respect the field in terms of both the fraction (F) of star-forming galaxies (SFGs) and the rate at which they form stars (SFR and sSFR =SFRM∗). On average, the F of SFGs is a factor ∼2 smaller in cluster cores than in the field. Furthermore, SFGs present average SFR and SFR typically ∼0.3 dex smaller in the clusters than in the field along the whole redshift range probed. Our results favour long time-scale quenching physical processes as the main driver of SF suppression in the inner cores of clusters since z ∼0.9, with shorter time-scale processes being very likely responsible for a fraction of the missing SFG population.

Original languageEnglish (US)
Pages (from-to)586-619
Number of pages34
JournalMonthly Notices of the Royal Astronomical Society
Volume485
Issue number1
DOIs
StatePublished - May 1 2019
Externally publishedYes

Keywords

  • catalogues
  • galaxies: clusters: general
  • galaxies: evolution
  • galaxies: star formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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