Jeans smoothing of the Ly$\alpha$ forest absorption lines

Abstract

We investigate a contribution of the Jeans smoothing to the minimal width of Ly$\alpha$ 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 $\gamma$ of the equation of state, a temperature at the mean density $T_0$ and a hydrogen photoionization rate $\Gamma$ within 4 redshift bins. Furthermore, in each bin we obtain an upper limit on the scale-parameter $f_{\mathrm{J}}$, which sets the relation between the Jeans length and the characteristic physical size of the absorber clouds.

arXiv comment6 pages, 4 figures, 1 table; to appear in proceedings of the International Conference PhysicA.Spb/2019, St. Petersburg, October 22-24, 2019

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Cited by in corpus (2)

• How to constrain warm dark matter with the Lyman $\alpha$ forest
• Thermal state of the intergalactic medium at $z\sim 2-4$