The COS-Holes Survey: Connecting Galaxy Black Hole Mass with the State of the CGM
The Astrophysical JournalWe present an analysis of Hubble Space Telescope COS/G160M observations of C IV in the inner circumgalactic medium (CGM) of a novel sample of eight z ∼ 0, L ≈ L ^⋆ galaxies, paired with UV-bright QSOs at impact parameters ( R _proj ) between 25 and 130 ...
Samantha L. Garza +11 more
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Kinematics of Circumgalactic O vi Gas and Disk Rotation of z ≈ 0.2 Star-forming Galaxies
The Astrophysical JournalQuasar sightline observations reveal that low ionization state gas corotates with the galaxy disk and often at subcentrifugal velocities, suggesting that the gas is spiraling toward the galaxy disk.
Stephanie H. Ho +4 more
doaj +1 more source
EXOSAT observations of a broad absorption-line quasar: PHL 5200 [PDF]
, 1987 In our observations of the 45' (FWHM) region centered on a broad absorption-line quasar PHL 5200 perfor- med with the medium energy (ME) and low energy (LE) experiments on board EXOSAT Observatory we have detected X-ray emission in the 2-6 keV energy ...
Singh, K. P. +2 more
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The Signatures of Density Fluctuations and Mixing Gas in Circumgalactic Absorption Systems
The Astrophysical JournalWe investigate the prospects for detecting and constraining density and temperature inhomogeneities in the circumgalactic medium using absorption measurements of metal ions.
Yakov Faerman +3 more
doaj +1 more source
One H2 molecule per ten million H atoms reveals sub-parsec-scale cold overdensities at z ∼ 4★
Astronomy & AstrophysicsWe present the detection and analysis of H2 absorption at z = 4.24 towards the bright quasar J 0007−5705, which was observed with the Very Large Telescope as part of the ESPRESSO QUasar Absorption Line Survey (EQUALS). The high resolving power of R ≈ 120
Noterdaeme P. +13 more
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Monitoring of the Aggregation Process of Dense Colloidal Silica Suspensions in a Stirred Tank by Acoustic Spectroscopy [PDF]
, 2008 The aim of this study is to analyze the behaviour of dense colloidal suspensions in flow by acoustic spectroscopy. The destabilization and the aggregation of stable colloidal silica dispersions in a stirred tank are obtained by addition of salt ...
Frances, Christine, Tourbin, Mallorie
core +1 more source
The Qz5 Survey. II. Metallicity Evolution of Damped Lyα Systems Out to z ∼ 5
The Astrophysical JournalDamped Ly α absorbers (DLAs) are the highest H i column density ( N _H I ) absorption line systems detected in the spectra of background quasars. DLAs dominate the neutral gas content of the Universe (Ω _HI ) and are used to measure the metallicity ...
M. E. Wisz +12 more
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On the Radiative Acceleration of Quasar Absorption Line Clouds
, 1978 Radiation may expel dense gas clouds from quasar emission line regions. Small clouds can be accelerated to velocities approaching c if they are confined so as to maintain high densities.
Goldreich, Peter
core
Circumnuclear Gas of a Quasar in Absorption and Emission Lines
The Astrophysical JournalWe present a detailed analysis of the unusual absorption- and emission-line spectrum of the quasar SDSS J074850.39+442439.0 (hereafter J0748+4424) at a redshift of z = 2.18. The archival SDSS optical spectrum is abundant in narrow absorption lines (NALs)
Xuejie Dai +12 more
doaj +1 more source
The Astrophysical JournalHow do galaxies of different luminosities contribute to the metal absorber populations of varying species and strength? We present our analysis of the predicted metal contributions from galaxies as observed in quasar absorption line spectra during the ...
Samir Kušmić +3 more
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