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Astrophysics > Cosmology and Nongalactic Astrophysics

arXiv:1307.6150 (astro-ph)
[Submitted on 23 Jul 2013 (v1), last revised 3 Oct 2013 (this version, v2)]

Title:Seeding supermassive black holes with a non-vortical dark-matter subcomponent

Authors:Ignacy Sawicki (U. Heidelberg, ITP), Valerio Marra (U. Heidelberg, ITP), Wessel Valkenburg (U. Leiden, Inst. Theor. Phys)
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Abstract:A perfect irrotational fluid with the equation of state of dust, Irrotational Dark Matter (IDM), is incapable of virializing and instead forms a cosmoskeleton of filaments with supermassive black holes at the joints. This stark difference from the standard cold dark matter (CDM) scenario arises because IDM must exhibit potential flow at all times, preventing shell-crossing from occurring. This scenario is applicable to general non-oscillating scalar-field theories with a small sound speed. Our model of combined IDM and CDM components thereby provides a solution to the problem of forming the observed billion-solar-mass black holes at redshifts of six and higher. In particular, as a result of the reduced vortical flow, the growth of the black holes is expected to be more rapid at later times as compared to the standard scenario.
Comments: 9 pages, 4 figures. v2 reflects version accepted for publication in PRD. Improvements to discussion of observable consequences of the scenario
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO); Astrophysics of Galaxies (astro-ph.GA); General Relativity and Quantum Cosmology (gr-qc)
Cite as: arXiv:1307.6150 [astro-ph.CO]
  (or arXiv:1307.6150v2 [astro-ph.CO] for this version)
  https://doi.org/10.48550/arXiv.1307.6150
Journal reference: Phys. Rev. D 88, 083520 (2013)
Related DOI: https://doi.org/10.1103/PhysRevD.88.083520

Submission history

From: Ignacy Sawicki [view email]
[v1] Tue, 23 Jul 2013 16:48:56 UTC (916 KB)
[v2] Thu, 3 Oct 2013 08:11:52 UTC (926 KB)
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