Self-gravitating system made of axions
Cosmology and Nongalactic Astrophysics
2011-03-23 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We show that the inclusion of an axion-like effective potential in the construction of a self-gravitating system made of scalar fields leads to a decrease on its compactness when the value of the self-interaction coupling constant is increased. By including the current values for the axion mass m and decay constant f_a, we have computed the mass and the radius for self-gravitating systems made of axion particles. It is found that such objects will have asteroid-size masses and radius of few meters, then, the self-gravitating system made of axions could play the role of scalar mini-machos that are mimicking a cold dark matter model for the galactic halo.
Cite
@article{arxiv.1001.1769,
title = {Self-gravitating system made of axions},
author = {J. Barranco and A. Bernal},
journal= {arXiv preprint arXiv:1001.1769},
year = {2011}
}
Comments
5 pages, 3 figures. References added. Accepted for publication in Physical Review D