Results 51 to 60 of about 5,245 (177)
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
openaire +2 more sources
A small-scale dynamo in feedback-dominated galaxies - III. Cosmological simulations [PDF]
, 2017 Magnetic fields are widely observed in the Universe in virtually all astrophysical objects, from individual stars to entire galaxies, even in the intergalactic medium, but their specific generation has long been debated.
Rieder, Michael, Teyssier, Romain
core +1 more source
Regulation of Star Formation by a Hot Circumgalactic Medium
The Astrophysical Journal, 2023 Galactic outflows driven by supernovae (SNe) are thought to be a powerful regulator of a galaxy’s star-forming efficiency. Mass, energy, and metal outflows ( η _M , η _E , and η _Z , here normalized by the star formation rate, the SNe energy, and metal ...
Christopher Carr +4 more
doaj +1 more source
Was the Cosmic Web of Protogalactic Material Permeated by Lobes of Radio Galaxies During the Quasar Era? [PDF]
, 2001 Evidence for extended active lifetimes (> 10^8 yr) for radio galaxies implies that many large radio lobes were produced during the `quasar era', 1.5 < z < 3, when the comoving density of radio sources was 2 -- 3 dex higher than the present level. However,
Best P. N. +10 more
core +2 more sources
A Budget and Accounting of Metals at z~0: Results from the COS-Halos Survey
, 2014 We present a budget and accounting of metals in and around star-forming galaxies at $z\sim 0$. We combine empirically derived star formation histories with updated supernova and AGB yields and rates to estimate the total mass of metals produced by ...
Katz, Neal +6 more
core +1 more source
Recent X-ray Observations and the Evolution of Hot Gas in Elliptical Galaxies: Evidence for Circumgalactic Gas [PDF]
, 1997 X-ray emitting gaseous halos, such as that in elliptical galaxies like NGC 4472, cannot have been produced solely from gas expelled from galactic stars.
Athanassoula E. +14 more
core +3 more sources
Probing extreme black‐hole outflows on short timescales via high spectral‐resolution x‐ray imagers
Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.Abstract We investigate outflows and the physics of super‐Eddington versus sub‐Eddington regimes in black hole systems. Our focus is on prospective science using next‐generation high‐resolution soft x‐ray instruments. We highlight the properties of black hole ultraluminous x‐ray source (ULX) systems in particular. Owing to scale invariance in accreting
C. Pinto +9 more
wiley +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 +2 more
openaire +1 more source
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 +12 more
doaj +1 more source
Positive and negative feedback by AGN jets in high-redshift galaxies [PDF]
, 2014 Simulations of feedback by jets from active galactic nuclei (AGN) in the past mostly focused on the interaction at large scales as the circumgalactic medium or intra-cluster medium for clusters of galaxies. Only in recent years, simulations have included
Broll, W., Schick, D.
core +2 more sources