Results 71 to 80 of about 5,245 (177)

Validating Semi-Analytic Models of High-Redshift Galaxy Formation using Radiation Hydrodynamical Simulations [PDF]

, 2018
We use a cosmological hydrodynamic simulation calculated with Enzo and the semi-analytic galaxy formation model (SAM) GAMMA to address the chemical evolution of dwarf galaxies in the early universe.
Côté, Benoit, O'Shea, Brian W., Silvia, Devin, Smith, Britton, Wise, John H.   +4 more
core   +2 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   +3 more sources

FEASTS Combined with Interferometry. IV. Mapping H i Emission to a Limit of NH i = 1017.7 cm−2 in Seven Edge-on Galaxies

The Astrophysical Journal
We present a statistical study of the neutral atomic hydrogen (H i ) gas extending into the circumgalactic medium perpendicular to the disk for seven edge-on galaxies with inclinations above 85° from the FEASTS program with a 3 σ (20 km s ^−1 ) column ...
Dong Yang, Jing Wang, Zhijie Qu, Zezhong Liang, Xuchen Lin, Simon Weng, Xinkai Chen, Barbara Catinella, Luca Cortese, D. B. Fisher, Luis C. Ho, Yingjie Jing, Fangzhou Jiang, Peng Jiang, Ziming Liu, Céline Péroux, Li Shao, Lister Staveley-Smith, Q. Daniel Wang, Jie Wang   +19 more
doaj   +1 more source

Extended Lyman-Alpha Emission around Star-forming Galaxies

, 2011
Lyman-alpha (Lya) photons that escape the interstellar medium of star-forming galaxies may be resonantly scattered by neutral hydrogen atoms in the circumgalactic and intergalactic media, thereby increasing the angular extent of the galaxy's Lya emission.
Berlind, Bond, Bouwens, Cowie, David Weinberg, Faucher-Giguère, Finkelstein, Gawiser, Guaita, Hayashino, Hayes, Hy Trac, Jordi Miralda-Escudé, Kashikawa, Keel, Kollmeier, Kravtsov, Kunth, Laursen, Loeb, Madau, Malhotra, Ono, Ouchi, Ouchi, Pieri, Rauch, Renyue Cen, Rhoads, Shopbell, Steidel, Steidel, Steidel, Taniguchi, Trac, Trac, Veilleux, Zheng, Zheng, Zheng Zheng, Östlin   +40 more
core   +1 more source

Discovery of Optically Emitting Circumgalactic Nebulae around the Majority of UV-luminous Quasars at Intermediate Redshift

The Astrophysical Journal
We report the discovery of large, ionized, [O ii ]-emitting circumgalactic nebulae around the majority of 30 UV-luminous quasars at z = 0.4–1.4 observed with deep, wide-field integral field spectroscopy with the Multi-Unit Spectroscopy Explorer (MUSE) by
Sean D. Johnson, Zhuoqi (Will) Liu, Jennifer I-Hsiu Li, Joop Schaye, Jenny E. Greene, Sebastiano Cantalupo, Gwen C. Rudie, Zhijie Qu, Hsiao-Wen Chen, Marc Rafelski, Sowgat Muzahid, Mandy C. Chen, Thierry Contini, Wolfram Kollatschny, Nishant Mishra, Patrick Petitjean, Michael Rauch, Fakhri S. Zahedy   +17 more
doaj   +1 more source

An HST/COS legacy survey of high-velocity ultraviolet absorption in the Milky Way's circumgalactic medium and the Local Group [PDF]

, 2017
To characterize the absorption properties of this circumgalactic medium (CGM) and its relation to the LG we present the so-far largest survey of metal absorption in Galactic high-velocity clouds (HVCs) using archival ultraviolet (UV) spectra of ...
Bekhti, N. Ben, Charlton, J. C., Fechner, C., Fox, A. J., Ganguly, R., Howk, J. C., Lehner, N., Muzahid, S., Nuza, S. E., Richter, P., Wakker, B. P., Wendt, M.   +11 more
core   +3 more sources

Unveiling the Sources of X-Ray Luminosity in DESI Galaxy Groups: Insights from the SRG/eROSITA All-sky Survey

The Astrophysical Journal
We use the first eROSITA all-sky survey to investigate the contributions of active galactic nuclei (AGN) and extended gas to the total X-ray luminosity ( L _X ) of galaxy groups with different halo masses ( M _h ) at different redshifts.
Yun-Liang Zheng, Xiaohu Yang, Teng Liu, Shijiang Chen, Esra Bulbul, Ang Liu, Yi Zhang, Dawei Li, Xi Kang, Yizhou Gu, Yirong Wang, Qingyang Li, Jiaqi Wang   +12 more
doaj   +1 more source

Keck Spectroscopy of Faint 3 < z < 7 Lyman Break Galaxies: III. The Mean Ultraviolet Spectrum at z=4 [PDF]

, 2011
We present and discuss the mean rest-frame ultraviolet spectrum for a sample of 81 Lyman Break Galaxies (LBGs) selected to be B-band dropouts with a mean redshift of z=3.9 and apparent magnitudes ...
Ellis, Richard S., Jones, Tucker, Stark, Daniel P.   +2 more
core   +2 more sources

The kinetic Sunyaev–Zel'dovich tomography – II. Probing the circumgalactic medium [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
We propose the use of the kinetic Sunyaev-Zel'dovich (kSZ) effect to probe the circumgalactic medium (CGM), with the aid of a spectroscopic survey covering the same area of a SZ survey. One can design an optimal estimator of the kSZ effect of the CGM with a matched filter, and construct the cross correlation between the estimator and the peculiar ...
Shao, Jiawei, Fang, Taotao
openaire   +2 more sources

MUSEQuBES: The Kinematics of O vi-bearing Gas in and around Low-redshift Galaxies

The Astrophysical Journal
We present a detailed study of the kinematics of O vi -bearing gas around 60 low-mass (median ${\mathrm{log}}_{10}({M}_{\star }/{M}_{\odot })$  = 8.9) galaxies at low redshift (0.1 
Sayak Dutta, Sowgat Muzahid, Joop Schaye, Sebastiano Cantalupo, Hsiao-Wen Chen, Sean Johnson   +5 more
doaj   +1 more source