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Q-stars in scalar-tensor gravitational theories

Athanasios Prikas
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Abstract

We study q-stars in Brans-Dicke gravitational theory. We find that when the Brans-Dicke constant, $ω_{\textrm{BD}}$, tends to infinity, the results of General Relativity are reproduced. For other values of $ω_{\textrm{BD}}$, the particle number, mass and radius of the star and the absolute value of the matter field are a few percent larger than in the case of General Relativity. We also investigate the general scalar-tensor gravitational theory and find that the star parameters are a few percent larger than in the case of General Relativity.

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Athanasios Prikas. 2005-06-12. Q-stars in scalar-tensor gravitational theories. https://doi.org/10.1016/j.physletb.2005.06.022

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