Results 41 to 50 of about 335 (139)
The Astrophysical Journal LettersAccording to modern cosmological models, galaxies are embedded within cosmic filaments, which supply a continuous flow of pristine gas, fueling star formation and driving their evolution. However, due to their low density, the direct detection of diffuse
Eshita Banerjee +4 more
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The Astrophysical JournalThis paper investigates the physical conditions of the circumgalactic medium of L ^⋆ galaxies through explorations of observed ion tracer gas kinematics and comparisons of observations to different ionization models.
Samantha L. Garza +6 more
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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
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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
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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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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
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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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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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The Distance to the Magellanic Stream: Constraints from Optical Absorption along Stellar Sight Lines
The Astrophysical JournalThe Magellanic Stream is a large tail of neutral and ionized gas originating from tidal and hydrodynamical interactions between the Magellanic Clouds as they orbit the Milky Way (MW).
Sapna Mishra +4 more
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