Cosmological 21-cm line observations to test scenarios of super-Eddington accretion on to black holes being seeds of high-redshifted supermassive black holes
نویسندگان
چکیده
In this paper, we study scenarios of the super-Eddington accretion onto black holes at high redshifts $z > 10$, which are expected to be seeds evolve supermassive until redshift \sim 7$. For an initial mass, $M_{\rm BH, ini} \lesssim 2 \times 10^{3} M_{\odot}$ a seed definitely need accretion, can applicable both astrophysical and primordial origins. Such disk inevitably emitted high-energy photons had heated cosmological plasma inter-galactic medium continuously from redshifts. case, cosmic history gas temperature is modified, by absorption feature 21 cm lines suppressed. By comparing theoretical predictions 21cm line with observational data $z\sim17$, obtain upper bound on mass-accretion rate as function BH masses. order realize BH} 10^9 7$ continuous consistent 17$, obtained severe mass 10^2 ($M_{\rm 10^6 M_{\odot}$) when assume its comoving number density $n_{\rm seed,0} 10^{-3} {\rm Mpc}^{-3}$ ($n_{\rm 10^{-7} Mpc}^{-3}$). We also discuss some implications for application holes.
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ژورنال
عنوان ژورنال: Physical review
سال: 2022
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.106.043539