Metal-enriched halo gas across galaxy overdensities over the last 10 billion years
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Metal-enriched halo gas across galaxy overdensities over the last 10 billion years. / Dutta, Rajeshwari; Fumagalli, Michele; Fossati, Matteo; Bielby, Richard M.; Stott, John P.; Lofthouse, Emma K.; Cantalupo, Sebastiano; Cullen, Fergus; Crain, Robert A.; Tripp, Todd M.; Prochaska, J. Xavier; Battaia, Fabrizio Arrigoni; Burchett, Joseph N.; Fynbo, Johan P. U.; Murphy, Michael T.; Schaye, Joop; Tejos, Nicolas; Theuns, Tom.
I: Monthly Notices of the Royal Astronomical Society, Bind 508, Nr. 3, 12.2021, s. 4573-4599.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Metal-enriched halo gas across galaxy overdensities over the last 10 billion years
AU - Dutta, Rajeshwari
AU - Fumagalli, Michele
AU - Fossati, Matteo
AU - Bielby, Richard M.
AU - Stott, John P.
AU - Lofthouse, Emma K.
AU - Cantalupo, Sebastiano
AU - Cullen, Fergus
AU - Crain, Robert A.
AU - Tripp, Todd M.
AU - Prochaska, J. Xavier
AU - Battaia, Fabrizio Arrigoni
AU - Burchett, Joseph N.
AU - Fynbo, Johan P. U.
AU - Murphy, Michael T.
AU - Schaye, Joop
AU - Tejos, Nicolas
AU - Theuns, Tom
PY - 2021/12
Y1 - 2021/12
N2 - We present a study of metal-enriched halo gas traced by Mg II and C IV absorption at z < 2 in the MUSE Analysis of Gas around Galaxies survey and the Quasar Sightline and Galaxy Evolution survey. Using these large and complete galaxy surveys in quasar fields, we study the dependence of the metal distribution on galaxy properties and overdensities, out to physical projected separations of 750 kpc. We find that the cool, low-ionization gas is significantly affected by the environment across the full redshift range probed, with approximate to 2-3 times more prevalent and stronger Mg II absorption in higher overdensity group environments and in regions with greater overall stellar mass and star formation rates. Complementary to these results, we have further investigated the more highly ionized gas as traced by CIV absorption, and found that it is likely to be more extended than the Mg II gas, with approximate to 2 times higher covering fraction at a given distance. We find that the strength and covering fraction of C IV absorption show less significant dependence on galaxy properties and environment than the Mg II absorption, but more massive and star-forming galaxies nevertheless also show approximate to 2 times higher incidence of C IV absorption. The incidence of Mg II and C IV absorption within the virial radius shows a tentative increase with redshift, being higher by a factor of approximate to 1.5 and approximate to 4, respectively, at z > 1. It is clear from our results that environmental processes have a significant impact on the distribution of metals around galaxies and need to be fully accounted for when analysing correlations between gaseous haloes and galaxy properties.
AB - We present a study of metal-enriched halo gas traced by Mg II and C IV absorption at z < 2 in the MUSE Analysis of Gas around Galaxies survey and the Quasar Sightline and Galaxy Evolution survey. Using these large and complete galaxy surveys in quasar fields, we study the dependence of the metal distribution on galaxy properties and overdensities, out to physical projected separations of 750 kpc. We find that the cool, low-ionization gas is significantly affected by the environment across the full redshift range probed, with approximate to 2-3 times more prevalent and stronger Mg II absorption in higher overdensity group environments and in regions with greater overall stellar mass and star formation rates. Complementary to these results, we have further investigated the more highly ionized gas as traced by CIV absorption, and found that it is likely to be more extended than the Mg II gas, with approximate to 2 times higher covering fraction at a given distance. We find that the strength and covering fraction of C IV absorption show less significant dependence on galaxy properties and environment than the Mg II absorption, but more massive and star-forming galaxies nevertheless also show approximate to 2 times higher incidence of C IV absorption. The incidence of Mg II and C IV absorption within the virial radius shows a tentative increase with redshift, being higher by a factor of approximate to 1.5 and approximate to 4, respectively, at z > 1. It is clear from our results that environmental processes have a significant impact on the distribution of metals around galaxies and need to be fully accounted for when analysing correlations between gaseous haloes and galaxy properties.
KW - galaxies: groups: general
KW - galaxies: haloes
KW - quasars: absorption lines
KW - MG-II ABSORPTION
KW - PRESSURE STRIPPING EVENTS
KW - STAR-FORMING GALAXIES
KW - LBG REDSHIFT SURVEY
KW - COLD DARK-MATTER
KW - C-IV ABSORPTION
KW - CIRCUMGALACTIC MEDIUM
KW - STELLAR MASS
KW - MUSE SNEAKS
KW - ENVIRONMENTAL DEPENDENCE
U2 - 10.1093/mnras/stab2752
DO - 10.1093/mnras/stab2752
M3 - Journal article
VL - 508
SP - 4573
EP - 4599
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 3
ER -
ID: 286626277