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Gas around galaxy haloes - III: hydrogen absorption signatures around galaxies and QSOs in the Sherwood simulation suite

Meiksin, Avery; Bolton, James S.; Puchwein, Ewald

Authors

Avery Meiksin

Ewald Puchwein



Abstract

Modern theories of galaxy formation predict that galaxies impact on their gaseous surroundings, playing the fundamental role of regulating the amount of gas converted into stars. While star-forming galaxies are believed to provide feedback through galactic winds, quasi-stellar objects (QSOs) are believed instead to provide feedback through the heat generated by accretion on to a central supermassive black hole. A quantitative difference in the impact of feedback on the gaseous environments of star-forming galaxies and QSOs has not been established through direct observations. Using the Sherwood cosmological simulations, we demonstrate that measurements of neutral hydrogen in the vicinity of star-forming galaxies and QSOs during the era of peak galaxy formation show excess Ly α absorption extending up to comoving radii of ∼150 kpc for star-forming galaxies and 300–700 kpc for QSOs. Simulations including supernovae-driven winds account for the absorption around star-forming galaxies but not QSOs.

Citation

Meiksin, A., Bolton, J. S., & Puchwein, E. (2017). Gas around galaxy haloes - III: hydrogen absorption signatures around galaxies and QSOs in the Sherwood simulation suite. Monthly Notices of the Royal Astronomical Society, 468(2), 1893-1901. https://doi.org/10.1093/mnras/stx191

Journal Article Type Article
Acceptance Date Jan 19, 2017
Online Publication Date Jan 23, 2017
Publication Date Jan 23, 2017
Deposit Date May 5, 2017
Publicly Available Date Mar 28, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 468
Issue 2
Pages 1893-1901
DOI https://doi.org/10.1093/mnras/stx191
Keywords Galaxies: formation, Intergalactic medium, Quasars: absorption lines, Largescale structure of Universe
Public URL https://nottingham-repository.worktribe.com/output/839432
Publisher URL https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stx191
Additional Information This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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