Compact statis stars with polytropic equation of state in minimal dilatonic gravity
Abstract
We present solution of the equations for relativistic static spherically symmetric stars (SSSS) in the model of minimal dilatonic gravity (MDG) using the polytropic equation of state. A polytropic equation of state, which has a good fitting with a more realistic one, is used. Results are obtained for all variables of a single neutron star in the model of MDG. The maximum mass about two solar masses is in accordance with the latest observations of pulsars. Several new effects are observed for the variables related with the dilaton and the cosmological constant . The mass-radius relation is also obtained. Special attention is paid to the behavior of the quantities which describe the effects analogous to those of dark energy and dark matter in MDG. The results of the present paper confirm the conclusion that the dilaton is able to play simultaneously the role of dark energy and dark matter.
Keywords
Cite
@article{arxiv.1412.3015,
title = {Compact statis stars with polytropic equation of state in minimal dilatonic gravity},
author = {Plamen Fiziev and Kalin Marinov},
journal= {arXiv preprint arXiv:1412.3015},
year = {2015}
}
Comments
10 pages, 10 figures, TeX file. New commnets, references and acknowledgments added. The jpg files for figures are replaced by eps ones. Accepted for publication in Bulgarian Astronomical Journal, vol. 22