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Title: Supermassive Black Holes from Ultra Strongly Self Interacting Dark Matter

Abstract

We consider the cosmological consequences if a small fraction (ƒ≲0.1) of the dark matter is ultra-strongly self-interacting, with an elastic self-interaction cross section per unit mass σ$$\gg$$1 cm2g-1. This possibility evades all current constraints that assume that the self-interacting component makes up the majority of the dark matter. Nevertheless, even a small fraction of ultra-strongly self-interacting dark matter (uSIDM) can have observable consequences on astrophysical scales. In particular, the uSIDM subcomponent can undergo gravothermal collapse and form seed black holes in the center of a halo. These seed black holes, which form within several hundred halo interaction times, contain a few percent of the total uSIDM mass in the halo. For reasonable values of σƒ, these black holes can form at high enough redshifts to grow to ~109M⊙ quasars by z≳6, alleviating tension within the standard Λ cold dark matter cosmology. The ubiquitous formation of central black holes in halos could also create cores in dwarf galaxies by ejecting matter during binary black hole mergers, potentially resolving the “too big to fail” problem.

Authors:
 [1];  [2];  [2]
+ Show Author Affiliations
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  2. Princeton Univ., NJ (United States)
Publication Date:
Research Org.:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1596714
Grant/Contract Number:  
SC0011632
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 804; Journal Issue: 2; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Pollack, Jason, Spergel, David N., and Steinhardt, Paul J. Supermassive Black Holes from Ultra Strongly Self Interacting Dark Matter. United States: N. p., 2015. Web. doi:10.1088/0004-637X/804/2/131.
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Pollack, Jason, Spergel, David N., & Steinhardt, Paul J. Supermassive Black Holes from Ultra Strongly Self Interacting Dark Matter. United States. https://doi.org/10.1088/0004-637X/804/2/131
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Pollack, Jason, Spergel, David N., and Steinhardt, Paul J. Tue . "Supermassive Black Holes from Ultra Strongly Self Interacting Dark Matter". United States. https://doi.org/10.1088/0004-637X/804/2/131. https://www.osti.gov/servlets/purl/1596714.
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@article{osti_1596714,
title = {Supermassive Black Holes from Ultra Strongly Self Interacting Dark Matter},
author = {Pollack, Jason and Spergel, David N. and Steinhardt, Paul J.},
abstractNote = {We consider the cosmological consequences if a small fraction (ƒ≲0.1) of the dark matter is ultra-strongly self-interacting, with an elastic self-interaction cross section per unit mass σ$\gg$1 cm2g-1. This possibility evades all current constraints that assume that the self-interacting component makes up the majority of the dark matter. Nevertheless, even a small fraction of ultra-strongly self-interacting dark matter (uSIDM) can have observable consequences on astrophysical scales. In particular, the uSIDM subcomponent can undergo gravothermal collapse and form seed black holes in the center of a halo. These seed black holes, which form within several hundred halo interaction times, contain a few percent of the total uSIDM mass in the halo. For reasonable values of σƒ, these black holes can form at high enough redshifts to grow to ~109M⊙ quasars by z≳6, alleviating tension within the standard Λ cold dark matter cosmology. The ubiquitous formation of central black holes in halos could also create cores in dwarf galaxies by ejecting matter during binary black hole mergers, potentially resolving the “too big to fail” problem.},
doi = {10.1088/0004-637X/804/2/131},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 804,
place = {United States},
year = {Tue May 12 00:00:00 EDT 2015},
month = {Tue May 12 00:00:00 EDT 2015}
}
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https://doi.org/10.1088/0004-637X/804/2/131
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