Antonella Garzilli
Measuring the temperature and profiles of Ly α absorbers
Garzilli, Antonella; Theuns, Tom; Schaye, Joop
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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