Results 21 to 30 of about 1,770 (180)
The Study of the Circumgalactic Medium with Quasar Pairs
The Astrophysical Journal Supplement Series, 2023 We have collected 10,025 foreground–background quasar pairs with projected distances d _p < 500 kpc from the large quasar catalog of the Sloan Digital Sky Survey DR16Q. We investigate the properties of the Mg ii absorption lines with W _r > 0.15 Å around
Zhi-Fu Chen +7 more
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Gas Kinematics in the Multiphase Circumgalactic Medium [PDF]
Proceedings of the International Astronomical Union, 2016 AbstractWe use high-resolution Keck, VLT, or Hubble Space Telescope spectra of background quasars to examine the kinematic properties of the multiphase, metal-enriched circumgalactic medium in the outskirts of galaxies at 0.08 < zgal < 1.0, focusing on the low-ionization Mgii and high-ionization Ovi doublets.
Nikole M. Nielsen +6 more
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The Anisotropic Circumgalactic Medium of Sub-L* Galaxies
The Astrophysical JournalUsing stacked emission-line flux measurements of cool circumgalactic gas (CGM) in lower-mass galaxies (10 ^9.0 ≤ M _* / M _⊙ ≤ 10 ^10.2 ), we measure the dependence of the emission characteristics on orientation relative to the disk plane as a function ...
Huanian Zhang, Miao Li, Dennis Zaritsky
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The physical nature of circumgalactic medium absorbers in
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT We study the nature of the low-redshift circumgalactic medium (CGM) in the Simba cosmological simulations as traced by ultraviolet absorption lines around galaxies in bins of stellar mass ($\mbox{$M_\star $}\, > 10^{10}{\rm M}_\odot$) for star-forming, green valley and quenched galaxies at impact parameters r⊥ ≤ 1.25r200.
Sarah Appleby +4 more
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The MUSECuBES surveys on the circumgalactic medium
, 2019 The circumgalactic medium (CGM) is a dynamic, complex, multiphase, metal-enriched gas reservoir surrounding galaxies which harbors gas and metal masses comparable to those in galaxies themselves. Using a large quantity of spectral and imaging data obtained with MUSE & UVES on the VLT and ACS & COS on-board HST, we have started a major campaign ...
Muzahid, Sowgat (6471758) +1 more
openaire +3 more sources
Understanding gas mixing in the circumgalactic medium [PDF]
Monthly Notices of the Royal Astronomical SocietyABSTRACT We study gas mixing in a simulated Milky Way–mass galaxy’s circumgalactic medium (CGM) using cosmological ‘zoom-in’ simulations. We insert tracer dyes in the CGM with different gas flows (shearing, coherent, and static) and diverse physical properties to track gas mixing.
Hilay Shah +3 more
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Key Physical Processes in the Circumgalactic Medium
Annual Review of Astronomy and Astrophysics, 2023 Spurred by rich, multiwavelength observations and enabled by new simulations, ranging from cosmological to subparsec scales, the past decade has seen major theoretical progress in our understanding of the circumgalactic medium (CGM). We review key physical processes in the CGM. Our conclusions include the following: ▪The properties of the CGM depend on
Faucher-Giguere, Claude-Andre +1 more
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The Truncated Circumgalactic Medium of the Large Magellanic Cloud
The Astrophysical Journal LettersThe Large Magellanic Cloud (LMC) is the nearest massive galaxy to the Milky Way (MW). Its circumgalactic medium (CGM) is complex and multiphase, containing both stripped H i structures like the Magellanic Stream and Bridge and a diffuse warm corona seen ...
Sapna Mishra +8 more
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Properties of the simulated circumgalactic medium [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT The circumgalactic medium (CGM) is closely linked to galaxy formation and evolution, but difficult to characterize observationally and typically poorly resolved in cosmological simulations. We use spherically symmetric, idealized, high-resolution simulations of the CGM in $10^{12}$ and $10^{11}\, \mathrm{M}_\odot$ dark matter ...
Cassandra Lochhaas +4 more
openaire +2 more sources
The Astrophysical Journal, 2023 The circumgalactic medium (CGM) is often assumed to exist in or near hydrostatic equilibrium, with the regulation of accretion and the effects of feedback treated as perturbations to a stable balance between gravity and thermal pressure.
Cassandra Lochhaas +11 more
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