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Measuring the temperature and profiles of Ly α absorbers

Garzilli, Antonella; Theuns, Tom; Schaye, Joop

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Authors

Antonella Garzilli

Joop Schaye



Abstract

The distribution of the absorption line broadening observed in the Lyα forest carries information about the temperature, T, and widths, λF, of the filaments in the intergalactic medium (IGM), and the background hydrogen photo-ionization rate, ΓHI. In this work, we present and test a new method for inferring T and λF and ΓHI from combining the distribution of the absorption line broadening and the median flux. The method accounts for any underlying degeneracies. We apply our method to mock spectra from the reference model of the EAGLE cosmological simulation, and we demonstrate that we are able to reconstruct the IGM properties.

Citation

Garzilli, A., Theuns, T., & Schaye, J. (2020). Measuring the temperature and profiles of Ly α absorbers. Monthly Notices of the Royal Astronomical Society, 492(2), 2193-2207. https://doi.org/10.1093/mnras/stz3585

Journal Article Type Article
Acceptance Date Dec 9, 2019
Online Publication Date Dec 23, 2019
Publication Date Feb 28, 2020
Deposit Date Dec 12, 2019
Publicly Available Date Jan 22, 2020
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 492
Issue 2
Pages 2193-2207
DOI https://doi.org/10.1093/mnras/stz3585
Public URL https://durham-repository.worktribe.com/output/1280903

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Copyright Statement
This article has been accepted for publication in the Monthly notices of the Royal Astronomical Society ©: 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.






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