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A homogeneous measurement of the delay between the onsets of gas stripping and star formation quenching in satellite galaxies of groups and clusters

Oman, Kyle A; Bahé, Yannick M; Healy, Julia; Hess, Kelley M; Hudson, Michael J; Verheijen, Marc AW

A homogeneous measurement of the delay between the onsets of gas stripping and star formation quenching in satellite galaxies of groups and clusters Thumbnail


Authors

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Dr Kyle Oman kyle.a.oman@durham.ac.uk
Assistant Professor - Royal Society Dorothy Hodgkin Fellow

Yannick M Bahé

Julia Healy

Kelley M Hess

Michael J Hudson

Marc AW Verheijen



Abstract

We combine orbital information from N-body simulations with an analytic model for star formation quenching and SDSS observations to infer the differential effect of the group/cluster environment on star formation in satellite galaxies. We also consider a model for gas stripping, using the same input supplemented with H I fluxes from the ALFALFA survey. The models are motivated by and tested on the Hydrangea cosmological hydrodynamical simulation suite. We recover the characteristic times when satellite galaxies are stripped and quenched. Stripping in massive (Mvir ∼ 1014.5 M⊙) clusters typically occurs at or just before the first pericentric passage. Lower mass (∼1013.5 M⊙) groups strip their satellites on a significantly longer (by ∼3 Gyr) timescale. Quenching occurs later: Balmer emission lines typically fade ∼3.5 Gyr (5.5 Gyr) after first pericentre in clusters (groups), followed a few hundred Myr later by reddenning in (g − r) colour. These ‘delay timescales’ are remarkably constant across the entire satellite stellar mass range probed (∼109.5–1011 M⊙), a feature closely tied to our treatment of ‘group pre-processing’. The lowest mass groups in our sample (∼1012.5 M⊙) strip and quench their satellites extremely inefficiently: typical timescales may approach the age of the Universe. Our measurements are qualitatively consistent with the ‘delayed-then-rapid’ quenching scenario advocated for by several other studies, but we find significantly longer delay times. Our combination of a homogeneous analysis and input catalogues yields new insight into the sequence of events leading to quenching across wide intervals in host and satellite mass.

Citation

Oman, K. A., Bahé, Y. M., Healy, J., Hess, K. M., Hudson, M. J., & Verheijen, M. A. (2021). A homogeneous measurement of the delay between the onsets of gas stripping and star formation quenching in satellite galaxies of groups and clusters. Monthly Notices of the Royal Astronomical Society, 501(4), 5073-5095. https://doi.org/10.1093/mnras/staa3845

Journal Article Type Article
Acceptance Date Dec 12, 2020
Online Publication Date Dec 14, 2021
Publication Date 2021-03
Deposit Date Jan 6, 2021
Publicly Available Date Mar 29, 2024
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 501
Issue 4
Pages 5073-5095
DOI https://doi.org/10.1093/mnras/staa3845
Related Public URLs https://arxiv.org/abs/2009.00667v3

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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©:2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.






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