Results 71 to 80 of about 1,770 (180)

Discovery of Optically Emitting Circumgalactic Nebulae around the Majority of UV-luminous Quasars at Intermediate Redshift

The Astrophysical Journal
We report the discovery of large, ionized, [O ii ]-emitting circumgalactic nebulae around the majority of 30 UV-luminous quasars at z = 0.4–1.4 observed with deep, wide-field integral field spectroscopy with the Multi-Unit Spectroscopy Explorer (MUSE) by
Sean D. Johnson, Zhuoqi (Will) Liu, Jennifer I-Hsiu Li, Joop Schaye, Jenny E. Greene, Sebastiano Cantalupo, Gwen C. Rudie, Zhijie Qu, Hsiao-Wen Chen, Marc Rafelski, Sowgat Muzahid, Mandy C. Chen, Thierry Contini, Wolfram Kollatschny, Nishant Mishra, Patrick Petitjean, Michael Rauch, Fakhri S. Zahedy   +17 more
doaj   +1 more source

MUSEQuBES: The Column Density, Covering Fraction, and Mass of O vi-bearing Gas in and Around Low-redshift Galaxies

The Astrophysical Journal
We present a study of O vi -bearing gas around 247 low-mass (median ${\mathrm{log}}_{10}({M}_{\star }/{M}_{\odot })$ = 8.7) galaxies at low redshifts (0.1 < z < 0.7) using background quasars as part of the MUSE Quasar-fields Blind Emitters Survey ...
Sayak Dutta, Sowgat Muzahid, Joop Schaye, Nicolas F. Bouché, Sebastiano Cantalupo, Hsiao-Wen Chen, Sean Johnson   +6 more
doaj   +1 more source

Unveiling the Sources of X-Ray Luminosity in DESI Galaxy Groups: Insights from the SRG/eROSITA All-sky Survey

The Astrophysical Journal
We use the first eROSITA all-sky survey to investigate the contributions of active galactic nuclei (AGN) and extended gas to the total X-ray luminosity ( L _X ) of galaxy groups with different halo masses ( M _h ) at different redshifts.
Yun-Liang Zheng, Xiaohu Yang, Teng Liu, Shijiang Chen, Esra Bulbul, Ang Liu, Yi Zhang, Dawei Li, Xi Kang, Yizhou Gu, Yirong Wang, Qingyang Li, Jiaqi Wang   +12 more
doaj   +1 more source

The origin of cold gas in the circumgalactic medium

Astronomy & Astrophysics
Context. The presence of cold gas (T ≲ 104 K) in the circumgalactic medium (CGM) of galaxies has been confirmed in observations and in high-resolution simulations, but its origin is still a puzzle. Possible mechanisms are cold accretion from the intergalactic medium (IGM), clumps embedded in outflows and transported from the disk, and gas detaching ...
Decataldo, Davide, Shen, Sijing, Mayer, Lucio, Baumschlager, Bernhard, Madau, Piero   +4 more
openaire   +4 more sources

MUSEQuBES: The Kinematics of O vi-bearing Gas in and around Low-redshift Galaxies

The Astrophysical Journal
We present a detailed study of the kinematics of O vi -bearing gas around 60 low-mass (median ${\mathrm{log}}_{10}({M}_{\star }/{M}_{\odot })$  = 8.9) galaxies at low redshift (0.1 
Sayak Dutta, Sowgat Muzahid, Joop Schaye, Sebastiano Cantalupo, Hsiao-Wen Chen, Sean Johnson   +5 more
doaj   +1 more source

Cooling flow solutions for the circumgalactic medium [PDF]

Monthly Notices of the Royal Astronomical Society, 2019
ABSTRACT In several models of galaxy formation feedback occurs in cycles or mainly at high redshift. At times and in regions where feedback heating is ineffective, hot gas in the galaxy halo is expected to form a cooling flow, where the gas advects inward on a cooling timescale.
Eliot Quataert, Claude-André Faucher-Giguère, Drummond Fielding, Jonathan Stern   +3 more
openaire   +2 more sources

The Circumgalactic Medium in Massive Halos [PDF]

, 2017
29 pages, 7 figures, invited review to appear in "Gas Accretion onto Galaxies", Astrophysics and Space Science Library, eds. A. Fox & R.
openaire   +2 more sources

The Morphology and Kinematics of a Giant, Symmetric Nebula around a Radio-loud Quasar 3C 57: Extended Rotating Gas or Biconical Outflows?

The Astrophysical Journal
Gas flows between galaxies and the circumgalactic medium play a crucial role in galaxy evolution. When ionized by a quasar, these gas flows can be directly traced as giant nebulae. We present a study of a giant nebula around a radio-loud quasar, 3C 57 at
Zhuoqi (Will) Liu, Sean D. Johnson, Jennifer I-Hsiu Li, Benoît Epinat, Gwen C. Rudie, Ana Monreal-Ibero, Sebastiano Cantalupo, Zhijie Qu, Mandy C. Chen, Wolfram Kollatschny, Sowgat Muzahid, Fakhri S. Zahedy, Elise Kesler, Nishant Mishra   +13 more
doaj   +1 more source

Cosmic Ray Mediated Thermal Fronts in the Warm-hot Circumgalactic Medium

The Astrophysical Journal
We investigate the 1D plane-parallel front connecting the warm (10 ^4 K) and hot (10 ^6 K) phases of the circumgalactic medium (CGM), focusing on the influence of cosmic rays (CRs) in shaping these transition layers.
Hanjue Zhu, Ellen G. Zweibel, Nickolay Y. Gnedin   +2 more
doaj   +1 more source

MAGiiCAT V. ORIENTATION of OUTFLOWS and ACCRETION DETERMINE the KINEMATICS and COLUMN DENSITIES of the CIRCUMGALACTIC MEDIUM

, 2015
We investigate the dependence of gas kinematics and column densities in the MgII-absorbing circumgalactic medium on galaxy color, azimuthal angle, and inclination to trace baryon cycle processes. Our sample of 30 foreground isolated galaxies at 0.
Michael Murphy (18924760), Nikole Nielsen (18923479), Jessica L. Evans (19001873), Glenn Kacprzak (18924052), Christopher W. Churchill (18999602)   +4 more
core   +1 more source