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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 731535.0, MPI für Astronomie / Publikationen_mpia
Circumgalactic medium of quasars: C IV absorption systems
Authors:Landoni, M.; Falomo, R.; Treves, A.; Scarpa, R.; Farina, E. P.
Date of Publication (YYYY-MM-DD):2016
Title of Journal:Monthly Notices of the Royal Astronomical Society
Volume:457
Issue / Number:1
Start Page:267
End Page:271
Audience:Not Specified
Abstract / Description:We investigate the properties of circumgalactic gas in the halo of quasar (QSO) host galaxies from C IV absorption-line systems. We use the optical spectroscopy of closely aligned pairs of quasars (projected distance ≤ 200 kpc) obtained at the Gran Telescopio Canarias to investigate the distribution of the absorbing gas for a sample of 18 quasars at z ˜ 2. We have found that the detected absorption systems of EW ≥ 0.3 Å associated with the foreground QSOs are revealed up to 200 kpc from the centre of the host galaxy. The structure of the absorbing gas is patchy with a covering fraction of the gas that quickly decreases beyond 100 kpc. These results are in qualitative agreement with those found for the lower ionization metal Mg II λ2800 Å.
Free Keywords:quasars: absorption lines; quasars: general
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0035-8711 %R 10.1093/mnras/stv2964
URL:http://cdsads.u-strasbg.fr/abs/2016MNRAS.457..267L
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