Evidence for anisotropic quenching in massive galaxy clusters at z ≈ 0.5

Stott, John P (2022) Evidence for anisotropic quenching in massive galaxy clusters at z ≈ 0.5. Monthly Notices of the Royal Astronomical Society, 511 (2). pp. 2659-2664. ISSN 0035-8711

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Abstract

A recent observational result finds that the quenching of satellites in groups at z = 0.08 has an angular dependence relative to the semimajor axis of the central galaxy. This observation is described as ‘anisotropic quenching’ or ‘angular conformity’. In this paper, I study the variation in the colour of a mass-limited sample of satellite galaxies relative to their angle from the major axis of the brightest cluster galaxy in the CLASH clusters up to z ∼ 0.5, 4 Gyr further in lookback time. The same result is found: galaxies close to the major axis are more quenched than those along the minor axis. I also find that the star-forming galaxies tend to avoid a region ±45○ from the major axis. This quenching signal is thought to be driven by AGN outflows along the minor axis, reducing the density of the intergalactic medium and thus the strength of ram pressure. Here, I will discuss potential alternative mechanisms. Finally, I note that the advent of the Legacy Survey of Space and Time (LSST) and Euclid surveys will allow for a more detailed study of this phenomenon and its evolution.

Item Type:
Journal Article
Journal or Publication Title:
Monthly Notices of the Royal Astronomical Society
Additional Information:
This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version John P Stott, Evidence for anisotropic quenching in massive galaxy clusters at z ≈ 0.5, Monthly Notices of the Royal Astronomical Society, Volume 511, Issue 2, April 2022, Pages 2659–2664, https://doi.org/10.1093/mnras/stac089 is available online at: https://academic.oup.com/mnras/article/511/2/2659/6509493
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1912
Subjects:
ID Code:
166919
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Deposited On:
18 Mar 2022 14:45
Refereed?:
Yes
Published?:
Published
Last Modified:
21 May 2022 00:52