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Mechanical feedback effects on primordial black hole accretion
- Source :
- Digital.CSIC. Repositorio Institucional del CSIC, instname, Dipòsit Digital de la UB, Universidad de Barcelona
- Publication Year :
- 2020
- Publisher :
- EDP Sciences, 2020.
-
Abstract
- [Context] Dark matter may consist, at least partially, of primordial black holes formed during the radiation-dominated era. The radiation produced by accretion onto primordial black holes leaves characteristic signatures on the properties of the medium at high redshift, before and after hydrogen recombination. Therefore, reliable modeling of accretion onto these objects is required to obtain robust constraints on their abundance.<br />[Aims] We investigate the effect of mechanical feedback, that is, the impact of outflows (winds and– or –jets) on the medium, on primordial black hole accretion, and thereby on the associated radiation.<br />[Methods] Using analytical and numerical calculations, we studied for the first time the possibility that outflows can reduce the accretion rate of primordial black holes with masses similar to those detected by the LIGO-Virgo collaboration.<br />[Results] Despite the complexity of the accretion rate evolution, mechanical feedback is useful in to significantly reducing the primordial black hole accretion rate, at least by one order of magnitude, when outflows are aligned with the motion of the compact object. If the outflow is perpendicular to the direction of motion, the effect is less important, but it is still non-negligible.<br />[Conclusions] Outflows from primordial black holes, even rather weak ones, can significantly decrease the accretion rate, effectively weakening abundance constraints on these objects. Our results motivate further numerical simulations with a more realistic setup, which would yield more precise quantitative predictions.<br />V.B-R. acknowledges support by the Spanish Ministerio de Economía y Competitividad (MINECO/FEDER, UE) under grant AYA2016-76012-C3-1-P, with partial support by the European Regional Development Fund (ERDF/FEDER), MDM-2014-0369 of ICCUB (Unidad de Excelencia “María de Maeztu”), and the Catalan DEC grant 2017 SGR 643. NB is supported by the Spanish MINECO under grant BES-2015-073372.
- Subjects :
- Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Astrophysics::High Energy Astrophysical Phenomena
Dark matter
FOS: Physical sciences
Primordial black hole
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Compact star
Radiation
01 natural sciences
General Relativity and Quantum Cosmology
0103 physical sciences
Astrophysics::Solar and Stellar Astrophysics
010303 astronomy & astrophysics
Astrophysics::Galaxy Astrophysics
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics
010308 nuclear & particles physics
jets and outflows [ISM]
Computer Science::Information Retrieval
Astronomy and Astrophysics
Black hole physics
Redshift
Accretion (astrophysics)
Forats negres (Astronomia)
ISM: jets and outflows
Dark matter (Astronomy)
Space and Planetary Science
Outflow
Matèria fosca (Astronomia)
Astrophysics::Earth and Planetary Astrophysics
Black holes (Astronomy)
Astrophysics - High Energy Astrophysical Phenomena
Order of magnitude
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- ISSN :
- 20167601
- Database :
- OpenAIRE
- Journal :
- Digital.CSIC. Repositorio Institucional del CSIC, instname, Dipòsit Digital de la UB, Universidad de Barcelona
- Accession number :
- edsair.doi.dedup.....f970fbf95fba8dfaccbe00eb6f7894d1