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

Rodríguez-Muñoz, L; Rodighiero, G; Mancini, C; Pérez-González, PG; Rawle, TD; Egami, E; Mercurio, A; Rosati, P; Puglisi, A; Franceschini, A; Balestra, I; Baronchelli, I; Biviano, A; Ebeling, H; Edge, AC; Enia, AFM; Grillo, C; Haines, CP; Iani, E; Jones, T; Nonino, M; Valtchanov, I; Vulcani, B; Zemcov, M

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=SFR/M∗⁠). On average, the F of SFGs is a factor ∼2 smaller in cluster cores than in the field. Furthermore, SFGs present average SFR and sSFR 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.

Citation

Rodríguez-Muñoz, L., Rodighiero, G., Mancini, C., Pérez-González, P., Rawle, T., Egami, E., …Zemcov, M. (2019). Quantifying the suppression of the (un)-obscured star formation in galaxy cluster cores at 0.2≲ z ≲0.9. Monthly Notices of the Royal Astronomical Society, 485(1), 586-619. https://doi.org/10.1093/mnras/sty3335

• Journal Article Type: Article
• Acceptance Date: Dec 5, 2018
• Online Publication Date: Feb 7, 2019
• Publication Date: May 31, 2019
• Deposit Date: May 29, 2019
• Publicly Available Date: May 29, 2019
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Electronic ISSN: 1365-2966
• Publisher: Royal Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 485
• Issue: 1
• Pages: 586-619
• DOI: https://doi.org/10.1093/mnras/sty3335