The Epoch of Reionization in Warm Dark Matter Scenarios

M. Romanello; N. Menci; M. Castellano

doi:10.20944/preprints202106.0521.v2

Preprint Article Version 2 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 16 June 2021 / Approved: 21 June 2021 / Online: 21 June 2021 (15:11:58 CEST)
Version 2 : Received: 5 November 2021 / Approved: 8 November 2021 / Online: 8 November 2021 (15:55:37 CET)

In this paper we investigate how the Reionization process is affected by early galaxy formation in different cosmological scenarios. We use a semi-analytic model with suppressed initial power spectra to obtain the UV Luminosity Function in thermal Warm Dark Matter and sterile neutrino cosmologies. We retrace the ionization history of intergalactic medium with hot stellar emission only, exploiting fixed and variable photons escape fraction models ( fesc). For each cosmology, we find an upper limit to fixed fesc, which guarantees the completion of the process at z <6.7. The analysis is tested with two limit hypothesis on high-z ionized hydrogen volume fraction, comparing our predictions with observational results.

Reionization; Warm Dark Matter; sterile neutrinos; escape fraction;

Physical Sciences, Astronomy and Astrophysics

Comment 1

Received: 8 November 2021
Commenter: Massimiliano Romanello
Commenter's Conflict of Interests: Author

Comment: New version (peer reviewed)

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The Epoch of Reionization in Warm Dark Matter Scenarios

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