Results 81 to 90 of about 10,836 (194)

The Signatures of Density Fluctuations and Mixing Gas in Circumgalactic Absorption Systems

The Astrophysical Journal
We investigate the prospects for detecting and constraining density and temperature inhomogeneities in the circumgalactic medium using absorption measurements of metal ions.
Yakov Faerman, Daniel R. Piacitelli, Matthew McQuinn, Jessica K. Werk   +3 more
doaj   +1 more source

Peering through the dust II: $XMM-Newton$ observations of two additional FIRST-2MASS red quasars

, 2017
We obtained $XMM-Newton$ observations of two highly luminous dust-reddened quasars, F2M1113+1244 and F2M1656+3821, that appear to be in the early, transitional phase predicted by merger-driven models of quasar/galaxy co-evolution. These sources have been
Glikman, Eilat, Lacy, Mark, LaMassa, Stephanie, Piconcelli, Enrico, Urry, Meg   +4 more
core   +1 more source

The COS-Holes Survey: Connecting Galaxy Black Hole Mass with the State of the CGM

The Astrophysical Journal
We 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, Jessica K. Werk, Benjamin D. Oppenheimer, Kirill Tchernyshyov, N. Nicole Sanchez, Yakov Faerman, Kate H. R. Rubin, Misty C. Bentz, Jonathan J. Davies, Joseph N. Burchett, Robert A. Crain, J. Xavier Prochaska   +11 more
doaj   +1 more source

Imaging and spectroscopy of galaxies associated with two z~0.7 damped Lyman-alpha absorption systems

, 2003
We have identified galaxies near two quasars which are at the redshift of damped Lyman-alpha (DLA) systems in the UV spectra of the quasars. Both galaxies are actively forming stars.
Bergeron J., Fioc M., Le Brun V., Lisa J. Storrie-Lombardi, Mark Lacy, Michael D. Gregg, Reimers D., Richard L. White, Robert H. Becker, Tanya Urrutia   +9 more
core   +1 more source

Kinematics of Circumgalactic O vi Gas and Disk Rotation of z ≈ 0.2 Star-forming Galaxies

The Astrophysical Journal
Quasar 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, Crystal L. Martin, Hasti Nateghi, Glenn G. Kacprzak, Jonathan Stern   +4 more
doaj   +1 more source

Directly imaging damped Lyman-alpha galaxies at z>2. I: Methodology and First Results

, 2010
We present the methodology for, and the first results from, a new imaging program aimed at identifying and characterizing the host galaxies of damped Lyman-alpha absorbers (DLAs) at z>2.
Aragon-Salamanca, Barnes, Bertin, Bertin, Bolton, Bouwens, Brammer, Bunker, Cardelli, Ceverino, Chen, Christensen, Christensen, Cooke, Cooke, Dekel, Dessauges-Zavadsky, Djorgovski, Downes, Ellison, Ferguson, Fox, Fynbo, Förster Schreiber, Genzel, Gilmour, Governato, Grazian, Grazian, Hennawi, Hildebrandt, J. Xavier Prochaska, Jedamzik, John M. O'Meara, Kacprzak, Kanekar, Kanekar, Kereš, Kim, Kulkarni, Kulkarni, Kulkarni, Landolt, Leibundgut, Madau, Madau, Matsuda, Michele Fumagalli, Monier, Møller, Møller, Møller, Møller, Nagamine, Nissim Kanekar, Noterdaeme, O'Meara, O'Meara, Obreschkow, Oke, Papovich, Pontzen, Pontzen, Prochaska, Prochaska, Prochaska, Rafelski, Rao, Rao, Rauch, Razoumov, Reddy, Reddy, Rutledge, Salim, Schaye, Schlegel, Storrie-Lombardi, Sutherland, Verheijen, Walter, Warren, Weatherley, Wolfe, Wolfe, Wolfe, Wolfe, Zwaan, Zwaan   +88 more
core   +1 more source

The CIViL* Survey: The Discovery of a C iv Dichotomy in the Circumgalactic Medium of L* Galaxies

The Astrophysical Journal Letters
This paper investigates C iv absorption in the circumgalactic medium (CGM) of L ^⋆ galaxies and its relationship with galaxy star formation rates. We present new observations from the C iv in L ^⋆ galaxies survey (PID # 17076) using the Hubble Space ...
Samantha L. Garza, Jessica K. Werk, Trystyn A. M. Berg, Yakov Faerman, Benjamin D. Oppenheimer, Rongmon Bordoloi, Sara L. Ellison   +6 more
doaj   +1 more source

Probing the Interstellar Medium of External Galaxies Using Quasar Absorption Lines: the 3C 232/NGC 3067 System [PDF]

Quasar absorption lines offer unique opportunities to probe the interstellar medium of external galaxies. Researchers present new optical and UV absorption line spectroscopy of the quasar 3C232 (z=0.55) revealing new detail in the foreground absorption ...
Case, James, Donahue, Megan, Shull, J. Michael, Snow, Theodore P., Stocke, John T.   +4 more
core   +1 more source

An FeLoBAL Binary Quasar

, 2002
In an ongoing infrared imaging survey of quasars at Keck Observatory, we have discovered that the z=1.285 quasar SDSS J233646.2-010732.6 comprises two point sources with a separation of 1.67". Resolved spectra show that one component is a standard quasar
Becker, Robert H., Chaffee, Fred H., Fan, Xiaohui, Gregg, Michael D., Richards, Gordon T., White, Richard L.   +5 more
core   +1 more source

MUSEQuBES: Unveiling Cosmic Web Filaments at z ≈ 3.6 through Dual Absorption and Emission Line Analysis

The Astrophysical Journal Letters
According 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, Sowgat Muzahid, Joop Schaye, Sebastiano Cantalupo, Sean D. Johnson   +4 more
doaj   +1 more source