Results 51 to 60 of about 2,374,498 (256)

The Anisotropic Circumgalactic Medium of Massive Early-type Galaxies

The Astrophysical Journal, 2022
Abstract Using measurements of the [O iii], Hα, and [N ii] emission line fluxes originating in the cool (T ∼104 K) gas that populates the halos of massive early-type galaxies with stellar masses greater than 1010.4 M ⊙, we explore the recent conjecture that active galactic nucleus (AGN) activity ...
Huanian 华年 Zhang 张, Dennis Zaritsky   +1 more
openaire   +2 more sources

Transverse clues on the kiloparsec-scale structure of the circumgalactic medium as traced by C IV absorption

Astronomy & Astrophysics
The kiloparsec-scale kinematics and density structure of the circumgalactic medium (CGM) is still poorly constrained observationally, which poses a problem for understanding the role of the baryon cycle in galaxy evolution.
Sebastián López, A. Afruni, David Zamora, Nicolás Tejos, C. Ledoux, J. Hernandez, Trystyn A. M. Berg, Helena Cortés, F. Urbina, Evelyn J. Johnston, L. Felipe Barrientos, Matthew Bayliss, R. Cuellar, Jens-Kristian Krogager, P. Noterdaeme, Manuel Solimano   +15 more
openalex   +2 more sources

A MUSE source-blind survey for emission from the circumgalactic medium. [PDF]

Sci Adv
The recent detection of optical emission lines from the circumgalactic medium (CGM) in combined, large samples of low-redshift, normal galaxy spectra hints at the potential to map the cool (∼104 kelvin) CGM in individual, representative galaxies.
Zhang H, Zaritsky D.
europepmc   +2 more sources

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

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

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

MUSEQuBES: characterizing the circumgalactic medium of redshift ≈3.3 Ly α emitters [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT We present the first characterization of the circumgalactic medium of Ly α emitters (LAEs), using a sample of 96 z ≈ 3.3 LAEs detected with the VLT/MUSE in fields centred on eight bright background quasars. The LAEs have low Ly α luminosities ($\sim 10^{42}\, \text{erg}\, \text{s}^{-1}$) and star formation rates (SFRs) $\sim 1 ...
Muzahid, Sowgat, Schaye, Joop, Cantalupo, Sebastiano, Marino, Raffaella Anna, Bouché, Nicolas, Johnson, Sean, Maseda, Michael, Wendt, Martin, Wisotzki, Lutz, Zabl, Johannes   +9 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

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