A VLT/MUSE galaxy survey towards QSO Q1410: looking for a WHIM traced by BLAs in inter-cluster filaments

Abstract Cosmological simulations predict that a significant fraction of the low-z baryon budget resides in large-scale filaments in the form of a diffuse plasma at temperatures T ∼ 105 − 107 K. However, direct observation of this so-called warm-hot intergalactic medium (WHIM) has been elusive. In t...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2018-07, Vol.477 (3), p.2991-3013
Main Authors: Pessa, Ismael, Tejos, Nicolas, Barrientos, L Felipe, Werk, Jessica, Bielby, Richard, Padilla, Nelson, Morris, Simon L, Prochaska, J Xavier, Lopez, Sebastian, Hummels, Cameron
Format: Article
Language:English
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Summary:Abstract Cosmological simulations predict that a significant fraction of the low-z baryon budget resides in large-scale filaments in the form of a diffuse plasma at temperatures T ∼ 105 − 107 K. However, direct observation of this so-called warm-hot intergalactic medium (WHIM) has been elusive. In the Λcold dark matter paradigm, galaxy clusters correspond to the nodes of the cosmic web at the intersection of several large-scale filamentary threads. In previous work, we used HST/COS data to conduct the first survey of broad H i  Lyα absorbers (BLAs) potentially produced by WHIM in inter-cluster filaments. We targeted a single QSO, namely Q1410, whose sightline intersects seven independent inter-cluster axes at impact parameters
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/sty723