The GOGREEN survey : dependence of galaxy properties on halo mass a z > 1 and implications for environmental quenching

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Reeves , A M M , Balogh , M L , van der Burg , R F J , Finoguenov , A , Kukstas , E , McCarthy , I G , Webb , K , Muzzin , A , McGee , S , Rudnick , G , Biviano , A , Cerulo , P , Chan , J C C , Cooper , M C , Demarco , R , Jablonka , P , De Lucia , G , Vulcani , B , Wilson , G , Yee , H K C & Zaritsky , D 2021 , ' The GOGREEN survey : dependence of galaxy properties on halo mass a z > 1 and implications for environmental quenching ' , Monthly Notices of the Royal Astronomical Society , vol. 506 , no. 3 , pp. 3364-3384 .

Title: The GOGREEN survey : dependence of galaxy properties on halo mass a z > 1 and implications for environmental quenching
Author: Reeves, Andrew M. M.; Balogh, Michael L.; van der Burg, Remco F. J.; Finoguenov, Alexis; Kukstas, Egidijus; McCarthy, Ian G.; Webb, Kristi; Muzzin, Adam; McGee, Sean; Rudnick, Gregory; Biviano, Andrea; Cerulo, Pierluigi; Chan, Jeffrey C. C.; Cooper, M. C.; Demarco, Ricardo; Jablonka, Pascale; De Lucia, Gabriella; Vulcani, Benedetta; Wilson, Gillian; Yee, Howard K. C.; Zaritsky, Dennis
Contributor: University of Helsinki, Department of Physics
Date: 2021-09
Language: eng
Number of pages: 21
Belongs to series: Monthly Notices of the Royal Astronomical Society
ISSN: 0035-8711
Abstract: We use photometric redshifts and statistical background subtraction to measure stellar mass functions in galaxy group-mass (4.5-8 x 10(13) M-circle dot) haloes at 1 < z < 1.5. Groups are selected from COSMOS and SXDF, based on X-ray imaging and sparse spectroscopy. Stellar mass (M-stell(ar)) functions are computed for quiescent and star-forming galaxies separately, based on their rest-frame UVJ colours. From these we compute the quiescent fraction and quiescent fraction excess (QFE) relative to the field as a function of M-stel(lar). QFE increases with M-st(ellar), similar to more massive clusters at 1 < z < 1.5. This contrasts with the apparent separability of M-stellar, and environmental factors on galaxy quiescent fractions at z similar to 0. We then compare our results with higher mass clusters at 1 < z < 1.5 and lower redshifts. We find a strong QFE dependence on halo mass at fixed M-ste(ll)ar; well fit by a logarithmic slope of d(QFE)/dlog (M-halo) similar to 0.24 +/- 0.04 for all M-stellar and redshift bins. This dependence is in remarkably good qualitative agreement with the hydrodynamic simulation BAHAMAS, but contradicts the observed dependence of QFE on M-stellar. We interpret the results using two toy models: one where a time delay until rapid (instantaneous) quenching begins upon accretion to the main progenitor ( 'no pre-processing') and one where it starts upon first becoming a satellite ('pre-processing'). Delay times appear to be halo mass-dependent, with a significantly stronger dependence required without pre-processing. We conclude that our results support models in which environmental quenching begins in low-mass ( 1.
Subject: galaxies: clusters: general
galaxies: evolution
galaxies: groups: general
galaxies: haloes
galaxies: high-redshift
galaxies: star formation
115 Astronomy, Space science

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