Searching for MgII absorbers in and around galaxy clusters

Abstract

To study environmental effects on the circumgalactic medium (CGM), we use the samples of redMaPPer galaxy clusters, background quasars and cluster galaxies from the SDSS. With ~82 000 quasar spectra, we detect 197 MgII absorbers in and around the clusters. The detection rate per quasar is 2.7$\pm$0.7 times higher inside the clusters than outside the clusters, indicating that MgII absorbers are relatively abundant in clusters. However, when considering the galaxy number density, the absorber-to-galaxy ratio is rather low inside the clusters. If we assume that MgII absorbers are mainly contributed by the CGM of massive star-forming galaxies, a typical halo size of cluster galaxies is smaller than that of field galaxies by 30$\pm$10 per cent. This finding supports that galaxy haloes can be truncated by interaction with the host cluster.

11 pages, 12 figures. To appear in MNRAS

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Cited by in corpus (8)

• The XQR-30 Metal Absorber Catalog: 778 Absorption Systems Spanning 2 < z < 6.5
• Constraining galaxy overdensities around three z~6.5 quasars with ALMA and MUSE
• Cool circumgalactic gas in galaxy clusters: connecting the DESI legacy imaging survey and SDSS DR16 MgII absorbers
• The Study of Circumgalactic Medium with Quasar Pairs
• The Jiao Tong University Spectroscopic Telescope Project
• Searching for cold gas traced by MgII quasar absorbers in massive X-ray-selected galaxy clusters
• Kinematic analysis of an Ultra-Strong MgII absorber at z~1.13 linking to Circumgalactic Gas Structures
• The abundance and origin of cool gas in galaxy clusters in the TNG-Cluster simulation