Results 31 to 40 of about 544 (157)

Interpreting Observations of Absorption Lines in the Circumgalactic Medium with a Turbulent Medium [PDF]

The Astrophysical Journal, 2020
Abstract Single-phase photoionization equilibrium (PIE) models are often used to infer the underlying physical properties of galaxy halos probed in absorption with ions at different ionization potentials. To incorporate the effects of turbulence, we use the Models of Agitated and Illuminated Hindering and Emitting Media (MAIHEM) code to ...
Edward Buie, Michele Fumagalli, Evan Scannapieco   +2 more
openaire   +5 more sources

The impact of star formation feedback on the circumgalactic medium [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
We use idealized 3D hydrodynamic simulations to study the dynamics and thermal structure of the circumgalactic medium (CGM). Our simulations quantify the role of cooling, stellar feedback driven galactic winds and cosmological gas accretion in setting the properties of the CGM in dark matter haloes ranging from $10^{11}$ to $10^{12}$ M$_\odot$.
Fielding, Drummond, Quataert, Eliot, McCourt, Michael, Thompson, Todd A.   +3 more
openaire   +2 more sources

The Angular Momentum of the Circumgalactic Medium in the TNG100 Simulation [PDF]

The Astrophysical Journal, 2020
Abstract We present an analysis of the angular momentum content of the circumgalactic medium (CGM) using TNG100, one of the flagship runs of the IllustrisTNG project. We focus on Milky Way–mass halos (∼1012 M ⊙) at z = 0 but also analyze other masses and redshifts up to z = 5.
Daniel DeFelippis, Shy Genel, Greg L. Bryan, Dylan Nelson, Annalisa Pillepich, Lars Hernquist   +5 more
openaire   +3 more sources

The hidden circumgalactic medium

, 2019
The cycling of baryons in and out of galaxies is what ultimately drives galaxy formation and evolution. The circumgalactic medium (CGM) represents the interface between the interstellar medium and the cosmic web, hence its properties are directly shaped by the baryon cycle.
Cicone, C., De Breuck, C., Chen, C., van Kampen, E., Narayanan, D., Mroczkowski, T., Andreani, P., Klaassen, P., Weiss, A., Kohno, K., Kauffmann, J., Wagg, J., Riechers, D., Gullberg, B., Geach, J., Shen, S., Hill, J., Brownson, S.   +17 more
openaire   +5 more sources

DUST IN THE CIRCUMGALACTIC MEDIUM OF LOW-REDSHIFT GALAXIES [PDF]

The Astrophysical Journal, 2015
Using spectroscopically selected galaxies from the Sloan Digital Sky Survey we present a detection of reddening due to dust in the circumgalactic medium of galaxies. We detect the mean change in the colors of "standard crayons" correlated with the presence of foreground galaxies at z ~0.05 as a function of angular separation.
J. E. G. Peek, Brice Ménard, Lia Corrales   +2 more
openaire   +4 more sources

The Panchromatic Circumgalactic Medium

, 2019
Galaxies are surrounded by extended atmospheres, which are often called the circumgalactic medium (CGM) and are the least understood part of galactic ecosystems. The CGM serves as a reservoir of both diffuse, metal-poor gas accreted from the intergalactic medium, and metal-rich gas that is either ejected from galaxies by energetic feedback or stripped ...
Wang, Q. Daniel, Burchett, Joseph N., Lehner, Nicolas, O'Meara, John M., Peeples, Molly S., Peek, J. E. G., Rafelski, Marc, Tumlinson, Jason, Werk, Jessica, Zaritsky, Dennis   +9 more
openaire   +2 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, J. F. Steiner, A. Bodaghee, P. Chakraborty, M. Sobolewska, D. R. Pasham, A. Ogorzalek, J. Zuhone, A. Bogdan, M. Vogelsberger   +9 more
wiley   +1 more source

Galactic winds in cosmological simulations of the circumgalactic medium [PDF]

Monthly Notices of the Royal Astronomical Society, 2013
(Abridged) We explore new observationally-constrained sub-resolution models of galactic outflows and investigate their impact on the circumgalactic medium (CGM) over redshifts z = 2 - 4. We perform cosmological hydrodynamic simulations, including star formation, chemical enrichment, and four cases of SNe-driven outflows: no wind (NW), an energy-driven ...
P. Barai, M. Viel, BORGANI, STEFANO, E. Tescari, TORNATORE, LUCA, K. Dolag, KILLEDAR, Madhura Akalank, MONACO, Pierluigi, V. D'Odorico, S. Cristiani   +9 more
openaire   +5 more sources

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, Greg L. Bryan, Drummond B. Fielding, Viraj Pandya, Rachel S. Somerville   +4 more
doaj   +1 more source

THE CIRCUMGALACTIC MEDIUM OF THE MILKY WAY IS HALF HIDDEN [PDF]

The Astrophysical Journal, 2015
We assess the fraction of the Milky Way's circumgalactic medium (CGM) eluding detection due to its velocity being similar to gas in the disk. This is achieved using synthetic observations of the CGM in a simulated MW-mass galaxy that shows similar CGM kinematics to the MW and external L$\sim$L$_*$ galaxies.
Y. Zheng, M. E. Putman, J. E. G. Peek, M. R. Joung   +3 more
openaire   +2 more sources