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Measuring the temperature and profiles of Lyman-α absorbers.

Garzilli, Antonella and Theuns, Tom and Schaye, Joop (2020) 'Measuring the temperature and profiles of Lyman-α absorbers.', Monthly notices of the Royal Astronomical Society., 492 (2). pp. 2193-2207.

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.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1093/mnras/stz3585
Publisher 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.
Date accepted:09 December 2019
Date deposited:22 January 2020
Date of first online publication:23 December 2019
Date first made open access:22 January 2020

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