Evolution of the Quasar Luminosity Function: Implications for EoR-21cm
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Authors
Kulkarni, G
Choudhury, TR
Puchwein, E
Haehnelt, MG
Publication Date
2018Journal Title
Proceedings of the International Astronomical Union
ISSN
1743-9213
Publisher
Cambridge University Press (CUP)
Volume
12
Issue
S333
Pages
246-249
Type
Article
Metadata
Show full item recordCitation
Kulkarni, G., Choudhury, T., Puchwein, E., & Haehnelt, M. (2018). Evolution of the Quasar Luminosity Function: Implications for EoR-21cm. Proceedings of the International Astronomical Union, 12 (S333), 246-249. https://doi.org/10.1017/S1743921317011140
Abstract
<jats:title>Abstract</jats:title><jats:p>We present predictions for the spatial distribution of 21 cm brightness temperature fluctuations from high-dynamic-range simulations for AGN-dominated reionization histories that have been tested against available <jats:italic>Lyα</jats:italic> and CMB data. We model AGN by extrapolating the observed M<jats:sub>bh</jats:sub>–σ relation to high redshifts and assign them ionizing emissivities consistent with recent UV luminosity function measurements. AGN-dominated reionization histories increase the variance of the 21 cm emission by a factor of up to ten compared to similar reionization histories dominated by faint galaxies, to values close to 100 mK<jats:sup>2</jats:sup> at scales accessible to experiments (<jats:italic>k</jats:italic> ≲ 1 cMpc<jats:sup>−1</jats:sup><jats:italic>h</jats:italic>). This is lower than the sensitivity reached by ongoing experiments by only a factor of about two or less. AGN dominated reionization should be easily detectable by LOFAR (and later HERA and SKA1) at their design sensitivity.</jats:p>
Sponsorship
Science and Technology Facilities Council (ST/M007065/1)
Identifiers
External DOI: https://doi.org/10.1017/S1743921317011140
This record's URL: https://www.repository.cam.ac.uk/handle/1810/283316
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