Ultradense dark matter haloes accompanying primordial black holes
M. Delos, and J. Silk. (2022)cite arxiv:2210.04904Comment: 5 pages, 3 figures.
Abstract
Primordial black holes (PBHs) form from large-amplitude initial density
fluctuations and may comprise some or all of the dark matter. If PBHs have an
extended mass spectrum, or in mixed PBH-particle dark matter scenarios, the
extreme density fluctuations necessary to produce PBHs also lead to the
formation of a much greater abundance of dark matter minihaloes with internal
densities potentially of order $10^12$ M$_ødot$ pc$^-3$. We develop an
analytic description of the formation of these ultradense haloes and use it to
quantitatively compare PBH and halo distributions. PBHs that contribute only a
per cent level fraction of the dark matter are accompanied by ultradense haloes
that nevertheless comprise an order-unity fraction. This finding significantly
alters the predictions of many PBH scenarios, enabling a variety of new
observational tests.
Description
Ultradense dark matter haloes accompanying primordial black holes
%0 Generic
%1 delos2022ultradense
%A Delos, M. Sten
%A Silk, Joseph
%D 2022
%K library
%T Ultradense dark matter haloes accompanying primordial black holes
%U http://arxiv.org/abs/2210.04904
%X Primordial black holes (PBHs) form from large-amplitude initial density
fluctuations and may comprise some or all of the dark matter. If PBHs have an
extended mass spectrum, or in mixed PBH-particle dark matter scenarios, the
extreme density fluctuations necessary to produce PBHs also lead to the
formation of a much greater abundance of dark matter minihaloes with internal
densities potentially of order $10^12$ M$_ødot$ pc$^-3$. We develop an
analytic description of the formation of these ultradense haloes and use it to
quantitatively compare PBH and halo distributions. PBHs that contribute only a
per cent level fraction of the dark matter are accompanied by ultradense haloes
that nevertheless comprise an order-unity fraction. This finding significantly
alters the predictions of many PBH scenarios, enabling a variety of new
observational tests.
@misc{delos2022ultradense,
abstract = {Primordial black holes (PBHs) form from large-amplitude initial density
fluctuations and may comprise some or all of the dark matter. If PBHs have an
extended mass spectrum, or in mixed PBH-particle dark matter scenarios, the
extreme density fluctuations necessary to produce PBHs also lead to the
formation of a much greater abundance of dark matter minihaloes with internal
densities potentially of order $10^{12}$ M$_\odot$ pc$^{-3}$. We develop an
analytic description of the formation of these ultradense haloes and use it to
quantitatively compare PBH and halo distributions. PBHs that contribute only a
per cent level fraction of the dark matter are accompanied by ultradense haloes
that nevertheless comprise an order-unity fraction. This finding significantly
alters the predictions of many PBH scenarios, enabling a variety of new
observational tests.},
added-at = {2022-10-12T09:35:52.000+0200},
author = {Delos, M. Sten and Silk, Joseph},
biburl = {https://www.bibsonomy.org/bibtex/2993edd25d0da795ddf8bfed65d1e4b7b/gpkulkarni},
description = {Ultradense dark matter haloes accompanying primordial black holes},
interhash = {ad54b73e3641bbcd5403a83527942380},
intrahash = {993edd25d0da795ddf8bfed65d1e4b7b},
keywords = {library},
note = {cite arxiv:2210.04904Comment: 5 pages, 3 figures},
timestamp = {2022-10-12T09:35:52.000+0200},
title = {Ultradense dark matter haloes accompanying primordial black holes},
url = {http://arxiv.org/abs/2210.04904},
year = 2022
}