Jeans smoothing of the Ly forest absorption lines

We investigate a contribution of the Jeans smoothing to the minimal width of Ly forest lines and discuss how the accounting for this additional broadening affects the inferred parameters of the intergalactic matter equation of state. We estimate a power-law index γ of the equation of state, a temper...

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Bibliographic Details
Published in:Journal of physics. Conference series 2019-11, Vol.1400 (2), p.22024
Main Authors: Telikova, K N, Balashev, S A, Shternin, P S
Format: Article
Language:English
Subjects:
Equations of state
Parameters
Photoionization
Physics
Red shift
Smoothing
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Summary:We investigate a contribution of the Jeans smoothing to the minimal width of Ly forest lines and discuss how the accounting for this additional broadening affects the inferred parameters of the intergalactic matter equation of state. We estimate a power-law index γ of the equation of state, a temperature at the mean density T0 and a hydrogen photoionization rate Γ within 4 redshift bins. Furthermore, in each bin we obtain an upper limit on the scale-parameter fJ, which sets the relation between the Jeans length and the characteristic physical size of the absorber clouds.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1400/2/022024