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- W1596682656 abstract "We investigate the extent and the properties of the MgII cool, low-density absorbing gas located in the halo and in the circum-galactic environment of quasars, using a sample of 31 projected quasar pairs with impact parameter pd<200kpc in the redshift range 0.5<z<1.6. In the transverse direction, we detect 18 MgII absorbers associated with the foreground quasars, while no absorption system originated by the gas surrounding the quasar itself is found along the line-of-sight. This suggests that the quasar emission induces an anisotropy in the absorbing gas distribution. Our observations indicate that the covering fraction (fc) of MgII absorption systems with rest frame equivalent width Wr(2796)>0.3Ang. ranges from fc~1.0 at pd<65kpc to fc~0.2 at pd>150kpc, and appears to be higher than for galaxies. Our findings support a scenario where the luminosity/mass of the host galaxies affect the extent and the richness of the absorbing MgII circum-galactic medium." @default.
- W1596682656 created "2016-06-24" @default.
- W1596682656 creator A5023527745 @default.
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- W1596682656 creator A5025418191 @default.
- W1596682656 creator A5038551760 @default.
- W1596682656 creator A5046272470 @default.
- W1596682656 creator A5090206203 @default.
- W1596682656 date "2014-05-02" @default.
- W1596682656 modified "2023-09-26" @default.
- W1596682656 title "The extent of the Mg ii absorbing circumgalactic medium of quasars★" @default.
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