Results 41 to 50 of about 5,245 (177)

The Circumgalactic Medium of Quasars [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractI will argue that observations of the diffuse gas in the outskirts of quasar host galaxies, or the so called circumgalactic medium, are essential for understanding how luminous quasars evolve in a cosmological context. Such observations also provide a fruitful comparison to theory, because hydrodynamics at moderate overdensities is much easier ...
openaire   +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

Mapping circumgalactic medium observations to theory using machine learning

Monthly Notices of the Royal Astronomical Society, 2023
ABSTRACT We present a random forest (RF) framework for predicting circumgalactic medium (CGM) physical conditions from quasar absorption line observables, trained on a sample of Voigt profile-fit synthetic absorbers from the simba cosmological simulation.
Sarah Appleby, Romeel Davé, Daniele Sorini, Christopher C Lovell, Kevin Lo   +4 more
openaire   +2 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

MUSE-ALMA Haloes – VIII. Statistical study of circumgalactic medium gas [PDF]

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT The distribution of gas and metals in the circumgalactic medium (CGM) plays a critical role in how galaxies evolve. The MUSE-ALMA Haloes survey combines MUSE, ALMA, and HST observations to constrain the properties of the multiphase gas in the CGM and the galaxies associated with the gas probed in absorption.
S Weng, C Péroux, A Karki, R Augustin, V P Kulkarni, R Szakacs, M A Zwaan, A Klitsch, A Hamanowicz, E M Sadler, A Biggs, A Y Fresco, M Hayes, J C Howk, G G Kacprzak, H Kuntschner, D Nelson, M Pettini   +17 more
openaire   +4 more sources

Gas Accretion in Star-Forming Galaxies

, 2016
Cold-mode gas accretion onto galaxies is a direct prediction of LCDM simulations and provides galaxies with fuel that allows them to continue to form stars over the lifetime of the Universe.
A. B. Ford, A. Boksenberg, A. Dekel, A. Dekel, A. J. Battisti, A. M. Brooks, A. M. Diamond-Stanic, A. M. Wolfe, B. A. Keeney, B. D. Oppenheimer, B. D. Savage, B. E. Penprase, B. P. Wakker, C. C. Steidel, C. C. Steidel, C. C. Steidel, C. J. Liang, C. L. Martin, C. Péroux, C. Thom, C. W. Churchill, C. W. Churchill, C. W. Churchill, C. W. Danforth, C.-A. Faucher-Giguère, D. C. Martin, D. C. Martin, D. Kereš, D. Kereš, D. Kunth, D. V. Bowen, F. Voort van de, F. Voort van de, G. C. Rudie, G. G. Kacprzak, G. G. Kacprzak, G. G. Kacprzak, G. G. Kacprzak, G. G. Kacprzak, G. G. Kacprzak, G. G. Kacprzak, G. G. Kacprzak, G. G. Kacprzak, H. Rahmani, H.-W. Chen, H.-W. Chen, H.-W. Chen, H.-W. Chen, H.-W. Chen, H.-W. Chen, I. Schroetter, J. Bergeron, J. C. Charlton, J. C. Charlton, J. D. Meiring, J. F. Navarro, J. N. Bregman, J. N. Burchett, J. N. Burchett, J. Ribaudo, J. T. Stocke, J. T. Stocke, J. Tumlinson, J. X. Prochaska, J. X. Prochaska, J. X. Prochaska, J.-K. Krogager, K. H. R. Rubin, K. L. Adelberger, K. L. Cooksey, K. M. Lanzetta, K. R. Sembach, K. R. Stewart, K. R. Stewart, M. Danovich, M. Danovich, M. Fumagalli, M. Fumagalli, M. Fumagalli, M. Fumagalli, M. Rafelski, N. Bouché, N. Bouché, N. Bouché, N. H. M. Crighton, N. H. M. Crighton, N. H. M. Crighton, N. L. Mathes, N. Lehner, N. Lehner, N. M. Nielsen, N. M. Nielsen, N. M. Nielsen, N. M. Nielsen, N. Yoshida, P. Guillemin, P. Ocvirk, P. Richter, P. Richter, R. A. Jorgenson, R. A. Jorgenson, R. Bordoloi, R. Bordoloi, R. Bordoloi, R. Cooke, R. J. Cooke, S. Borthakur, S. Côté, S. D. Johnson, S. D. Johnson, S. L. Ellison, S. Muzahid, S. Muzahid, S. Quiret, S. Shen, S. Shen, S. Zibetti, T. Goerdt, T. J. Cooper, T. Kimm, T. M. Tripp, T. M. Tripp, T. M. Tripp, T.-W. Lan, Y. Birnboim, Y. Zheng   +125 more
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High-resolution absorption spectroscopy of the circumgalactic medium of the Milky Way

, 2013
In this article we discuss the importance of high-resolution absorption spectroscopy for our understanding of the distribution and physical nature of the gaseous circumgalactic medium (CGM) that surrounds the Milky Way.
Bekhti, N. Ben, Bomans, D., Fox, A. J., Frank, S., Murphy, M. T., Richter, P.   +5 more
core   +1 more source

Mining Circumgalactic Baryons in the Low-Redshift Universe [PDF]

, 2014
(Abridged) This paper presents an absorption-line study of the multiphase circumgalactic medium (CGM) based on observations of Lya, CII, CIV, SiII, SiIII, and SiIV absorption transitions in the vicinities of 195 galaxies at redshift zRh leads to a strict
Chen, Hsiao-Wen, Liang, Cameron Jia
core   +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

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
openaire   +4 more sources