Potential--density pairs for spherical galaxies and bulges: the influence of scalar fields
Abstract
A family of potential--density pairs has been found for spherical halos and bulges of galaxies in the Newtonian limit of scalar--tensor theories of gravity. The scalar field is described by a Klein--Gordon equation with a source that is coupled to the standard Poisson equation of Newtonian gravity. The net gravitational force is given by two contributions: the standard Newtonian potential plus a term stemming from massive scalar fields. General solutions have been found for spherical systems. In particular, we compute potential--density pairs of spherical galactic systems, and some other astrophysical quantities that are relevant to generating initial conditions for spherical galaxy simulations.
Keywords
Cite
@article{arxiv.astro-ph/0401572,
title = {Potential--density pairs for spherical galaxies and bulges: the influence of scalar fields},
author = {M. A. Rodriguez-Meza and Jorge L. Cervantes-Cota},
journal= {arXiv preprint arXiv:astro-ph/0401572},
year = {2009}
}
Comments
Paper accepted for publication in MNRAS, with four figures