The Influence of Environment on the Circumgalactic Medium

Abstract

The effect of environment on the circumgalactic medium (CGM) is investigated through a comparison of Lya absorption line data in the Virgo Cluster and the field. This Letter uses the first systematic survey of background QSOs in and around the Virgo Cluster and large existing surveys of galaxies at low redshift. While previous studies found denser gas (higher equivalent width) closer to a galaxy (lower impact parameter), this correlation disappears in the Virgo environment. In addition, the covering fraction of the CGM is lower in the cluster environment than in the circumcluster environment and field. The results indicate that the CGM is suppressed for cluster galaxies while galaxies in the circumcluster environment have abundant CGM. The truncation of the CGM may result in the quenching of star formation through starvation. Our results also show that CGM surveys must consider the role of environment.

5 pages, 3 figures, ApJL in press

References in corpus (5)

• The Arecibo Legacy Fast ALFA Survey: III. HI Source Catalog of the Northern Virgo Cluster Region
• Not Dead Yet: Cool Circumgalactic Gas in the Halos of Early Type Galaxies
• Environmentally-Driven Evolution of Simulated Cluster Galaxies
• A Spectacular H$\alpha$ Complex in Virgo: Evidence for a Collision Between M86 and NGC 4438 and Implications for Collisional ISM Heating of Ellipticals
• Distances from Stellar Kinematics for Peculiar Virgo Cluster Spiral Galaxies

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• A Deep Search For Faint Galaxies Associated With Very Low-redshift C IV Absorbers: III. The Mass- and Environment-dependent Circumgalactic Medium
• Warm-hot Gas in X-ray Bright Galaxy Clusters and the H I-deficient Circumgalactic Medium in Dense Environments
• Revealing the Dark Threads of the Cosmic Web
• The Red Dead Redemption Survey of Circumgalactic Gas About Massive Galaxies. I. Mass and Metallicity of the Cool Phase
• Metal line emission from galaxy haloes at z~1
• Lyman Alpha and MgII as Probes of Galaxies and their Environments
• Lyman-alpha Absorbers and the Coma Cluster
• Ultraviolet Signatures of the Multiphase Intracluster and Circumgalactic Media in the RomulusC Simulation
• The QuaStar Survey: Detecting Hidden Low-Velocity Gas in the Milky Way's Circumgalactic Medium
• It's a Breeze: The Circumgalactic Medium of a Dwarf Galaxy is Easy to Strip
• The COS-legacy survey of C IV absorbers: properties and origins of the intervening systems
• The Ultraviolet Detection of Diffuse Gas in Galaxy Groups
• X-ray mapping the outer regions of galaxy clusters at z= 0.23 and 0.45
• Discovery of an HI-rich Gas Reservoir in the Outskirts of SZ-effect Selected Clusters
• Searching for MgII absorbers in and around galaxy clusters
• COS Observations of the Cosmic Web: A Search for the Cooler Components of a Hot, X-ray Identified Filament
• Soft X-ray emission from warm gas in IllustrisTNG circum-cluster environments
• Detection of a Multiphase Intragroup Medium: Results from the COS-IGrM Survey
• Detection of Metal-Rich, Cool-Warm Gas in the Outskirts of Galaxy Clusters
• DIISC-I: The Discovery of Kinematically Anomalous HI Clouds in M 100
• Searching for cold gas traced by MgII quasar absorbers in massive X-ray-selected galaxy clusters