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Dark matter: Dynamical problems

Dark matter: Dynamical problems We discuss the issues related to the dynamic properties of dark matter, considering the motion of a massive body in the medium consisting of dark matter particles. The formulas for estimating the acceleration (deceleration) of the body depending on the density and velocity distribution of particles in the medium are given. We estimate the dark matter accretion rate onto the compact objects in the galactic nuclei. There is a significant difference between the black holes and other compact objects (neutron stars, dense star clusters, etc.): while the black holes absorb all the incident particles of dark matter within the capture cross-section, other objects are virtually transparent to these particles, making only the gravitational capture possible. We propose a new cosmological test based on the analysis of redshift dependence of the mass-luminosity ratio for the galaxies and galactic systems. A set of problems linked with the interaction of dark and ordinary matter is discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Astrophysical Bulletin Springer Journals

Dark matter: Dynamical problems

Astrophysical Bulletin , Volume 69 (4) – Nov 23, 2014

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References (27)

Publisher
Springer Journals
Copyright
Copyright © 2014 by Pleiades Publishing, Ltd.
Subject
Physics; Astronomy, Astrophysics and Cosmology
ISSN
1990-3413
eISSN
1990-3421
DOI
10.1134/S1990341314040014
Publisher site
See Article on Publisher Site

Abstract

We discuss the issues related to the dynamic properties of dark matter, considering the motion of a massive body in the medium consisting of dark matter particles. The formulas for estimating the acceleration (deceleration) of the body depending on the density and velocity distribution of particles in the medium are given. We estimate the dark matter accretion rate onto the compact objects in the galactic nuclei. There is a significant difference between the black holes and other compact objects (neutron stars, dense star clusters, etc.): while the black holes absorb all the incident particles of dark matter within the capture cross-section, other objects are virtually transparent to these particles, making only the gravitational capture possible. We propose a new cosmological test based on the analysis of redshift dependence of the mass-luminosity ratio for the galaxies and galactic systems. A set of problems linked with the interaction of dark and ordinary matter is discussed.

Journal

Astrophysical BulletinSpringer Journals

Published: Nov 23, 2014

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