Exploring the high-redshift PBH-\${\textbackslash}{Lambda}\$CDM Universe: early black hole seeding, the first stars and cosmic radiation backgrounds. Cappelluti, N., Hasinger, G., & Natarajan, P. arXiv:2109.08701 [astro-ph], September, 2021. arXiv: 2109.08701
Exploring the high-redshift PBH-\${\textbackslash}{Lambda}\$CDM Universe: early black hole seeding, the first stars and cosmic radiation backgrounds [link]Paper  abstract   bibtex   
We explore the observational implications of a model in which primordial black holes (PBHs) with a broad birth mass function ranging in mass from a fraction of a solar mass to \${\textbackslash}sim\$10\${\textasciicircum}6\$ M\$_\{{\textbackslash}odot\}\$, consistent with current observational limits, constitute the dark matter component in the Universe. The formation and evolution of dark matter and baryonic matter in this PBH-\${\textbackslash}Lambda\$CDM\textasciitilde Universe are presented. In this picture, PBH DM mini-halos collapse earlier than in standard \textbackslashLambdaCDM, baryons cool to form stars at \$z{\textbackslash}sim15-20\$, and growing PBHs at these early epochs start to accrete through Bondi capture. The volume emissivity of these sources peaks at \$z{\textbackslash}sim20\$ and rapidly fades at lower redshifts. As a consequence, PBH DM could also provide a channel to make early black hole seeds and naturally account for the origin of an underlying dark matter halo - host galaxy and central black hole connection that manifests as the \$M_\{{\textbackslash}rm bh\}-{\textbackslash}sigma\$ correlation. To estimate the luminosity function and contribution to integrated emission power spectrum from these high-redshift PBH DM halos, we develop a Halo Occupation Distribution (HOD) model. In addition to tracing the star formation and reionizaton history, it permits us to evaluate the Cosmic Infrared and X-ray Backgrounds (CIB and CXB). We find that accretion onto PBHs/AGN successfully accounts for the detected backgrounds and their cross-correlation, with the inclusion of an additional IR stellar emission component. Detection of the deep IR source count distribution by the JWST could reveal the existence of this population of high-redshift star-forming and accreting PBH DM.
@article{cappelluti_exploring_2021,
	title = {Exploring the high-redshift {PBH}-\${\textbackslash}{Lambda}\${CDM} {Universe}: early black hole seeding, the first stars and cosmic radiation backgrounds},
	shorttitle = {Exploring the high-redshift {PBH}-\${\textbackslash}{Lambda}\${CDM} {Universe}},
	url = {http://arxiv.org/abs/2109.08701},
	abstract = {We explore the observational implications of a model in which primordial black holes (PBHs) with a broad birth mass function ranging in mass from a fraction of a solar mass to \${\textbackslash}sim\$10\${\textasciicircum}6\$ M\$\_\{{\textbackslash}odot\}\$, consistent with current observational limits, constitute the dark matter component in the Universe. The formation and evolution of dark matter and baryonic matter in this PBH-\${\textbackslash}Lambda\$CDM{\textasciitilde} Universe are presented. In this picture, PBH DM mini-halos collapse earlier than in standard {\textbackslash}LambdaCDM, baryons cool to form stars at \$z{\textbackslash}sim15-20\$, and growing PBHs at these early epochs start to accrete through Bondi capture. The volume emissivity of these sources peaks at \$z{\textbackslash}sim20\$ and rapidly fades at lower redshifts. As a consequence, PBH DM could also provide a channel to make early black hole seeds and naturally account for the origin of an underlying dark matter halo - host galaxy and central black hole connection that manifests as the \$M\_\{{\textbackslash}rm bh\}-{\textbackslash}sigma\$ correlation. To estimate the luminosity function and contribution to integrated emission power spectrum from these high-redshift PBH DM halos, we develop a Halo Occupation Distribution (HOD) model. In addition to tracing the star formation and reionizaton history, it permits us to evaluate the Cosmic Infrared and X-ray Backgrounds (CIB and CXB). We find that accretion onto PBHs/AGN successfully accounts for the detected backgrounds and their cross-correlation, with the inclusion of an additional IR stellar emission component. Detection of the deep IR source count distribution by the JWST could reveal the existence of this population of high-redshift star-forming and accreting PBH DM.},
	urldate = {2021-10-25},
	journal = {arXiv:2109.08701 [astro-ph]},
	author = {Cappelluti, Nico and Hasinger, Günther and Natarajan, Priyamvada},
	month = sep,
	year = {2021},
	note = {arXiv: 2109.08701},
	keywords = {Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena},
}

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