Gravitational instability with a dark matter background: exploring the different scenarios

We study the Jeans-type gravitational instability for a self-gravitating medium composed of two species, baryonic (bright) and dark matter particles, using a hybrid quantum-classical fluid approach. Baryonic matter is treated classically, which is appropriate for most astrophysical environments, e.g...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2022-06, Vol.82 (6), p.1-11, Article 565
Main Author: Ourabah, Kamel
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Baryons
Dark matter
Dark matter (Astronomy)
Elementary Particles
Globules
Gravitation
Gravitational instability
Hadrons
Heavy Ions
Jeans (Clothing)
Mathematical models
Measurement Science and Instrumentation
Neutrinos
Nonlinearity
Nuclear Energy
Nuclear Physics
Pauli exclusion principle
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Radiation, Background
Regular Article - Theoretical Physics
Stability criteria
String Theory
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Summary:We study the Jeans-type gravitational instability for a self-gravitating medium composed of two species, baryonic (bright) and dark matter particles, using a hybrid quantum-classical fluid approach. Baryonic matter is treated classically, which is appropriate for most astrophysical environments, e.g., Bok globules, while dark matter is treated through a quantum hydrodynamic approach allowing for possible nonlinearities. These nonlinearities may arise in bosonic dark matter due to attractive or repulsive short-range self-interaction (attractive interaction being more relevant for axions) or from the Pauli exclusion principle for fermionic dark matter, e.g., massive neutrinos. This allows us to explore, in a very broad context, the impact of a dark matter background on the Jeans process for different scenarios discussed in the literature. We confront the established stability criterion with Bok globule stability observations and show that the model adequately accounts for the data with dark matter parameters close to those predicted independently from numerical simulations.
ISSN:1434-6052
1434-6044
1434-6052
DOI:10.1140/epjc/s10052-022-10529-0