The Unchanging Circumgalactic Medium Over the Past 11 Billion Years

Abstract

This paper examines how the circumgalactic medium (CGM) evolves as a function of time by comparing results from different absorption-line surveys that have been conducted in the vicinities of galaxies at different redshifts. Despite very different star formation properties of the galaxies considered in these separate studies and different intergalactic radiation fields at redshifts between z~2.2 and z~0, I show that both the spatial extent and mean absorption equivalent width of the CGM around galaxies of comparable mass have changed little over this cosmic time interval.

8 pages, 3 figures, accepted for publication in MNRAS

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• The Co-Evolution of Galaxies and the Cool Circumgalactic Medium Probed with the SDSS and DESI Legacy Imaging Surveys
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• Metal Enrichment in the Reionization Epoch
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• Observational Diagnostics of Gas Flows: Insights from Cosmological Simulations
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• MUSE Analysis of Gas around Galaxies (MAGG) -- VI. The cool and enriched gas environment of z$\gtrsim$3 Ly$\alpha$ emitters
• Star-forming Galactic Contrails at z=3.2 as a Source of Metal Enrichment and Ionizing Radiation
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• Baryonic Ecosystem IN Galaxies (BEINGMgII) -- III. Cool gas reservoirs at $0.3\le z\le 1.6$ in the Dark Energy Survey