Ultra-compact spherically symmetric dark matter charged star objects

Abstract

We study the properties of ultra-compact spherically symmetric dark matter sector star objects, being the solution of Einstein equations with two $U(1)$-gauge fields. One of them is the ordinary Maxwell field, while the auxiliary gauge field pertains to the hidden sector, and mimics the properties of dark matter. The visible and hidden sectors are coupled by a kinetic mixing term with a coupling constant $\alpha$. We also investigate the possibility of condensation of charged scalar field around the reflecting dark matter star object. It happens that dark matter sector, both dark matter charge and coupling constant, cause shrinking of the star radius for which the condensation may occur.

arXiv comment15 pages, 3 figures, JCAP style

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• Charged compact star in $f(R,T)$ gravity in Tolman-Kuchowicz spacetime
• Scalarization of horizonless reflecting stars: neutral scalar fields non-minimally coupled to Maxwell fields
• Extended Phase Space Thermodynamics for Black Holes in a Cavity
• Scalarization of compact stars in the scalar-Gauss-Bonnet gravity
• Influence of dark matter on black hole scalar hair
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• Influence of dark photon on magnetized and charged particle orbits around static spherically symmetric black hole
• Mass formulae and staticity condition for dark matter charged black holes
• Can synchrotron radiation reveal the presence of {\it dark sector} around black hole?
• A no-go theorem for scalar fields with couplings from Ginzburg-Landau models
• Black hole dark monopole system