期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 427, 期 2, 页码 1238-1244出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2966.2012.22053.x
关键词
surveys; galaxies: haloes; quasars: absorption lines; galaxies: star formation
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 approximate to 2.2 and z similar to 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.
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