Gravitational cooling of self-gravitating Bose-Condensates

Details Gravitational cooling of self-gravitating Bose-Condensates Gravitational cooling of self-gravitating Bose-Condensates

2006-03-22

arxiv.org/abs/astro-ph/0603613v1

Astrophys.J.645:814-819,2006

Astronomy and Astrophysics

Astrophysics

10 aastex pages, 12 eps figures. Accepted for publication in ApJ

Scientific paper

10.1086/504508

Equilibrium configurations for a self-gravitating scalar field with self-interaction are constructed. The corresponding Schr\"odinger-Poisson (SP) system is solved using finite differences assuming spherical symmetry. It is shown that equilibrium configurations of the SP system are late-time attractor solutions for initially quite arbitrary density profiles, which relax and virialize through the emission of scalar field bursts; a process dubbed gravitational cooling. Among other potential applications, these results indicate that scalar field dark matter models (in its different flavors) tolerate the introduction of a self-interaction term in the SP equations. This study can be useful in exploring models in which dark matter in galaxies is not point-like.

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