Rights statement: This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Rajeshwari Dutta, Michele Fumagalli, Matteo Fossati, Richard M Bielby, John P Stott, Emma K Lofthouse, Sebastiano Cantalupo, Fergus Cullen, Robert A Crain, Todd M Tripp, J Xavier Prochaska, Fabrizio Arrigoni Battaia, Joseph N Burchett, Johan P U Fynbo, Michael T Murphy, Joop Schaye, Nicolas Tejos, Tom Theuns, Metal-enriched halo gas across galaxy overdensities over the last 10 billion years, Monthly Notices of the Royal Astronomical Society, Volume 508, Issue 3, December 2021, Pages 4573–4599, https://doi.org/10.1093/mnras/stab2752 is available online at: https://academic.oup.com/mnras/article-abstract/508/3/4573/6375434
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
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 - Arrigoni Battaia, Fabrizio
AU - Burchett, Joseph N.
AU - Fynbo, Johan P. U.
AU - Murphy, Michael T.
AU - Schaye, Joop
AU - Tejos, Nicolas
AU - Theuns, Tom
N1 - This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Rajeshwari Dutta, Michele Fumagalli, Matteo Fossati, Richard M Bielby, John P Stott, Emma K Lofthouse, Sebastiano Cantalupo, Fergus Cullen, Robert A Crain, Todd M Tripp, J Xavier Prochaska, Fabrizio Arrigoni Battaia, Joseph N Burchett, Johan P U Fynbo, Michael T Murphy, Joop Schaye, Nicolas Tejos, Tom Theuns, Metal-enriched halo gas across galaxy overdensities over the last 10 billion years, Monthly Notices of the Royal Astronomical Society, Volume 508, Issue 3, December 2021, Pages 4573–4599, https://doi.org/10.1093/mnras/stab2752 is available online at: https://academic.oup.com/mnras/article-abstract/508/3/4573/6375434
PY - 2021/12/31
Y1 - 2021/12/31
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 ≍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 C IV absorption, and found that it is likely to be more extended than the Mg II gas, with ≍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 ≍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 ≍1.5 and ≍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 ≍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 C IV absorption, and found that it is likely to be more extended than the Mg II gas, with ≍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 ≍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 ≍1.5 and ≍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
U2 - 10.1093/mnras/stab2752
DO - 10.1093/mnras/stab2752
M3 - Journal article
VL - 508
SP - 4573
EP - 4599
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 3
ER -