Quantifying the suppression of the (un)-obscured star formation in galaxy cluster cores at 0.2≲ z ≲0.9. Issue 1 (7th February 2019)

• Record Type: Journal Article
• Authors: Rodríguez-Muñoz, L; Rodighiero, G; Mancini, C; Pérez-González, P G; Rawle, T D; Egami, E; Mercurio, A; Rosati, P; Puglisi, A; Franceschini, A; Balestra, I; Baronchelli, I; Biviano, A; Ebeling, H; Edge, A C; Enia, A F M; Grillo, C; Haines, C P; Iani, E; Jones, T; Nonino, M; Valtchanov, I; Vulcani, B; Zemcov, M
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 485:Issue 1(2019)
• Page Start: 586
• Page End: 619
• Publication Date: 2019-02-07
• Subjects: galaxies: clusters: general -- galaxies: evolution -- galaxies: star formation -- catalogues; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/sty3335
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: We quantify the star formation (SF) in the inner cores ($\mathcal {R}$ / R 200 ≤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 ($\mathcal {M}_{*}\gt 10^{10}$ 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 ($\mathcal {F}$ ) of star-forming galaxies (SFGs) and the rate at which they form stars ($\mathcal {SFR}$ and $s\mathcal {SFR} = \mathcal {SFR}/\mathcal {M}_{*}$ ). On average, the $\mathcal {F}$ of SFGs is a factor ∼2 smaller in cluster cores than in the field. Furthermore, SFGs present average $\mathcal {SFR}$ and $s\mathcal {SFR}$ 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.