%0 Generic %1 cappelluti2021exploring %A Cappelluti, Nico %A Hasinger, Günther %A Natarajan, Priyamvada %D 2021 %K library %T Exploring the high-redshift PBH-$Łambda$CDM Universe: early black hole seeding, the first stars and cosmic radiation backgrounds %U http://arxiv.org/abs/2109.08701 %X 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 $\sim$10$^6$ M$_ødot$, 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-$Łambda$CDM~ Universe are presented. In this picture, PBH DM mini-halos collapse earlier than in standard ŁambdaCDM, baryons cool to form stars at $z\sim15-20$, and growing PBHs at these early epochs start to accrete through Bondi capture. The volume emissivity of these sources peaks at $z\sim20$ 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 $M_bh-\sigma$ 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.

@misc{cappelluti2021exploring, 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 $\sim$10$^6$ M$_{\odot}$, 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-$\Lambda$CDM~ Universe are presented. In this picture, PBH DM mini-halos collapse earlier than in standard \LambdaCDM, baryons cool to form stars at $z\sim15-20$, and growing PBHs at these early epochs start to accrete through Bondi capture. The volume emissivity of these sources peaks at $z\sim20$ 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 $M_{\rm bh}-\sigma$ 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.}, added-at = {2021-09-21T06:59:57.000+0200}, author = {Cappelluti, Nico and Hasinger, Günther and Natarajan, Priyamvada}, biburl = {https://www.bibsonomy.org/bibtex/2a281231c761ec14144e966e84f74376d/gpkulkarni}, description = {Exploring the high-redshift PBH-$\Lambda$CDM Universe: early black hole seeding, the first stars and cosmic radiation backgrounds}, interhash = {6dc2877125534a5ea28e9f5277628c1d}, intrahash = {a281231c761ec14144e966e84f74376d}, keywords = {library}, note = {cite arxiv:2109.08701Comment: 31 pages, 20 figures, submitted to ApJ, comments welcome}, timestamp = {2021-09-21T06:59:57.000+0200}, title = {Exploring the high-redshift PBH-$\Lambda$CDM Universe: early black hole seeding, the first stars and cosmic radiation backgrounds}, url = {http://arxiv.org/abs/2109.08701}, year = 2021 }