Results 41 to 50 of about 544 (157)

The physical nature of circumgalactic medium absorbers in Simba

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, Romeel Davé, Daniele Sorini, Weiguang Cui, Jacob Christiansen   +4 more
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The imprint of dark subhaloes on the circumgalactic medium [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT The standard model of cosmology, the Λ cold dark matter (ΛCDM) model, robustly predicts the existence of a multitude of dark matter ‘subhaloes’ around galaxies like the Milky Way. A wide variety of observations have been proposed to look for the gravitational effects such subhaloes would induce in observable matter.
Ian G McCarthy, Andreea S Font
openaire   +2 more sources

Figuring Out Gas and Galaxies in Enzo (FOGGIE). IX. The Angular Momentum Evolution of Milky Way–like Galaxies and Their Circumgalactic Gas

The Astrophysical Journal
We investigate the coevolution of the angular momentum of Milky Way–like galaxies, their circumgalactic gas, and their dark matter halos using zoom-in simulations from the Figuring Out Gas and Galaxies in Enzo suite.
Raymond C. Simons, Molly S. Peeples, Jason Tumlinson, Brian W. O’Shea, Cassandra Lochhaas, Anna C. Wright, Ayan Acharyya, Ramona Augustin, Kathleen A. Hamilton-Campos, Britton D. Smith, Nicolas Lehner, Jessica K. Werk, Yong Zheng   +12 more
doaj   +1 more source

Ceci n’est pas une Couche de Mélange: The Meaning of Resolved Turbulent Radiative Mixing

The Astrophysical Journal
Turbulent radiative mixing layers (TRMLs) are of fundamental importance to the transport of energy and momentum in multiphase, astrophysical fluids. We use measurements of the microscopic and macroscopic properties of these layers in high-resolution ...
Lachlan Lancaster, Rajsekhar Mohapatra, Drummond B. Fielding, Greg L. Bryan   +3 more
doaj   +1 more source

The circumgalactic medium

This is a pre-print of a chapter for the Encyclopedia of Astrophysics (edited by I. Mandel, section editor S.
Chen, Hsiao-Wen, Zahedy, Fakhri S.
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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, Oh, S. Peng   +1 more
openaire   +2 more sources

The Origin of Da Scaling: Suppressed Cooling in Fast-cooling Mixing Layers

The Astrophysical Journal
In numerical experiments simulating turbulent radiative mixing layers (TRMLs), it is observed that as the cooling time in the mixed gas, t _cool , becomes very short compared to the dynamical time of the turbulence, t _eddy / t _cool  ≫ 1, there is a ...
Lachlan Lancaster, Drummond Fielding, Rajsekhar Mohapatra, Greg L. Bryan   +3 more
doaj   +1 more source

On the Origin of High-velocity Clouds in the Galaxy

The Astrophysical Journal
The origin of our Galaxy’s high-velocity clouds (HVCs) remains a mystery after many decades of effort. In this paper, we use the TNG50 simulation of the IllustrisTNG project to identify cool, dense clouds that match observations of Galactic H i HVCs.
Scott Lucchini, Jiwon Jesse Han, Lars Hernquist, Charlie Conroy   +3 more
doaj   +1 more source

The SUPERCOLD-CGM Survey. I. Probing the Extended CO(4–3) Emission of the Circumgalactic Medium in a Sample of 10 Enormous Lyα Nebulae at z ∼ 2

The Astrophysical Journal, 2023
To understand how massive galaxies at high z coevolve with enormous reservoirs of halo gas, it is essential to study the coldest phase of the circumgalactic medium (CGM), which directly relates to stellar growth.
Jianrui Li, Bjorn H. C. Emonts, Zheng Cai, Jianan Li, Fabrizio Arrigoni Battaia, Jason X Prochaska, Ilsang Yoon, Matthew D. Lehnert, Craig Sarazin, Yunjing Wu, Mark Lacy, Brian Mason, Kyle Massingill   +12 more
doaj   +1 more source

Analyzing Oxygen Ionization in the Circumgalactic Medium

Research Notes of the AAS, 2021
Abstract Galaxies are surrounded by low-density, highly-ionized clouds of gas, called the Circumgalactic Medium (CGM), which provides insight into galaxy evolution. CGM observations are sensitive to ionization levels, which requires studying ionization types: photoionization (PI), more density-dependent and associated with cooler gas ...
Sally Zhu, Rahul Sharma, Clayton J. Strawn   +2 more
openaire   +1 more source