The circum-galactic medium of quasars: transverse and line-of-sight absorptions

Abstract

Quasar projected pairs (QPPs) can be used for investigating the circumgalactic medium of quasars through the study of intervening absorption lines in the spectrum of the background quasar that are at the same redshift of the foreground quasar. Here we report on optical spectroscopy, gathered at Gran Telescopio Canarias, of 14 QPPs. In 7 cases we find MgII absorption lines associated with the foreground quasar. Only for two cases line-of-sight absorptions (LOS) are revealed. These new observations complement our previous study performed on other 30 QPPs. A brief discussion of the properties of the intervening absorption lines associated with the foreground quasar for the full dataset is reported.

arXiv comment9 pages, 5 figures, accepted for publication in Astrophysics and Space Science

References in corpus (13)

• The Circumgalactic Medium
• Feedback and Recycled Wind Accretion: Assembling the z=0 Galaxy Mass Function
• The Half Million Quasars (HMQ) Catalogue
• The Impact of Star Formation Feedback on the Circumgalactic Medium
• Quasars Probing Quasars I: Optically Thick Absorbers Near Luminous Quasars
• Quasars Probing Quasars VI. Excess HI Absorption Within One Proper Mpc of z~2 Quasars
• On the redshift of TeV BL Lac objects
• Dust in the Circumgalactic Medium of Low-Redshift Galaxies
• On the origin of excess cool gas in quasar host halos
• The extent of the MgII absorbing circum-galactic medium of quasars
• On the cool gaseous haloes of quasars
• Spatially Resolved Metal Loss from M31
• Signature of outflows in strong MgII absorbers in quasar sightlines