Matches in SemOpenAlex for { <https://semopenalex.org/work/W3103175047> ?p ?o ?g. }
- W3103175047 endingPage "66" @default.
- W3103175047 startingPage "66" @default.
- W3103175047 abstract "Recent studies have revealed a dynamic interplay between the galaxy ecosystem and circumgalactic medium (CGM). We investigate the CGM at high redshifts (z ≳ 2) by using bright afterglows of gamma-ray bursts (GRBs) as background sources. We compiled a sample of medium-resolution (Δv < 50 km s−1) and high signal-to-noise ratio (typical S/N ∼ 10) spectra from 27 GRB afterglows covering z ∼ 2–6, with six of them at z ≳ 4. We analyzed the high- and low-ionization absorption features within ±400 km s−1 to extract the CGM and interstellar medium (ISM) kinematics. In the stacked spectra, high-ionization absorption profiles (e.g., C iv, Si iv) present significant absorption excess in their blue wings (v < −100 km s−1) relative to the red wings (v > 100 km s−1). The stronger blue wings in high-ionization species are indicative of the presence of ubiquitous warm outflows in the GRB hosts at high redshifts. We used simple toy models to kinematically distinguish the CGM and ISM absorption and estimate the CGM mass and outflow velocity. We find tentative evidence of the evolution of the CGM metal mass by ∼0.5 dex between two redshift bins, each spanning 1 Gyr, z1: 2–2.7 and z2: 2.7–5. By comparing with past studies, we find that over the course of evolution of present-day galaxies with M* > 1010 M⊙, the ratio of C iv mass in the CGM to the stellar mass remains fairly uniform, with log(MC iv/M*) ∼ −4.5 within ±0.5 dex from z ∼ 4 to z ∼ 0, suggesting CGM–galaxy coevolution." @default.
- W3103175047 created "2020-11-23" @default.
- W3103175047 creator A5031948703 @default.
- W3103175047 creator A5066623199 @default.
- W3103175047 creator A5078616858 @default.
- W3103175047 date "2019-10-11" @default.
- W3103175047 modified "2023-09-30" @default.
- W3103175047 title "The CGM–GRB Study. I. Uncovering the Circumgalactic Medium around GRB Hosts at Redshifts 2–6" @default.
- W3103175047 cites W1488192889 @default.
- W3103175047 cites W1532014147 @default.
- W3103175047 cites W1674341624 @default.
- W3103175047 cites W1688406301 @default.
- W3103175047 cites W174732049 @default.
- W3103175047 cites W1897009212 @default.
- W3103175047 cites W1898317671 @default.
- W3103175047 cites W1964261965 @default.
- W3103175047 cites W1969939835 @default.
- W3103175047 cites W1977486943 @default.
- W3103175047 cites W1979958629 @default.
- W3103175047 cites W1983520954 @default.
- W3103175047 cites W1986303447 @default.
- W3103175047 cites W1990209373 @default.
- W3103175047 cites W1994156061 @default.
- W3103175047 cites W2004902419 @default.
- W3103175047 cites W2006160097 @default.
- W3103175047 cites W2010946099 @default.
- W3103175047 cites W2024922695 @default.
- W3103175047 cites W2027220275 @default.
- W3103175047 cites W2033859797 @default.
- W3103175047 cites W2038854264 @default.
- W3103175047 cites W2040441522 @default.
- W3103175047 cites W2042857033 @default.
- W3103175047 cites W2045603377 @default.
- W3103175047 cites W2047806989 @default.
- W3103175047 cites W2052831225 @default.
- W3103175047 cites W2056539748 @default.
- W3103175047 cites W2058210847 @default.
- W3103175047 cites W2059628351 @default.
- W3103175047 cites W2060923225 @default.
- W3103175047 cites W2061616354 @default.
- W3103175047 cites W2062790267 @default.
- W3103175047 cites W2064888972 @default.
- W3103175047 cites W2073868676 @default.
- W3103175047 cites W2076246932 @default.
- W3103175047 cites W2080386153 @default.
- W3103175047 cites W2084646370 @default.
- W3103175047 cites W2086437052 @default.
- W3103175047 cites W2091864771 @default.
- W3103175047 cites W2099551201 @default.
- W3103175047 cites W2101307399 @default.
- W3103175047 cites W2101447891 @default.
- W3103175047 cites W2101687185 @default.
- W3103175047 cites W2103267716 @default.
- W3103175047 cites W2106418369 @default.
- W3103175047 cites W2112213929 @default.
- W3103175047 cites W2114561384 @default.
- W3103175047 cites W2116610103 @default.
- W3103175047 cites W2118190921 @default.
- W3103175047 cites W2118534222 @default.
- W3103175047 cites W2119131940 @default.
- W3103175047 cites W2131085026 @default.
- W3103175047 cites W2133898867 @default.
- W3103175047 cites W2135625048 @default.
- W3103175047 cites W2136054245 @default.
- W3103175047 cites W2137699785 @default.
- W3103175047 cites W2139971953 @default.
- W3103175047 cites W2153886904 @default.
- W3103175047 cites W2158622701 @default.
- W3103175047 cites W2159132166 @default.
- W3103175047 cites W2159431892 @default.
- W3103175047 cites W2160888524 @default.
- W3103175047 cites W2165542860 @default.
- W3103175047 cites W2168444438 @default.
- W3103175047 cites W2192697332 @default.
- W3103175047 cites W2338033719 @default.
- W3103175047 cites W24142966 @default.
- W3103175047 cites W2464531482 @default.
- W3103175047 cites W2474884382 @default.
- W3103175047 cites W2522815141 @default.
- W3103175047 cites W2528477579 @default.
- W3103175047 cites W2539770846 @default.
- W3103175047 cites W2575767105 @default.
- W3103175047 cites W2594781706 @default.
- W3103175047 cites W2597238720 @default.
- W3103175047 cites W2599925174 @default.
- W3103175047 cites W2610250334 @default.
- W3103175047 cites W2736368318 @default.
- W3103175047 cites W2736838127 @default.
- W3103175047 cites W2756617856 @default.
- W3103175047 cites W2765989795 @default.
- W3103175047 cites W2787073449 @default.
- W3103175047 cites W2788556386 @default.
- W3103175047 cites W2798790498 @default.
- W3103175047 cites W2805783412 @default.
- W3103175047 cites W2808342581 @default.
- W3103175047 cites W2851740057 @default.
- W3103175047 cites W2889409564 @default.
- W3103175047 cites W2895970607 @default.