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.

15 pages, 3 figures, JCAP style

References in corpus (20)

• Observation of an anomalous positron abundance in the cosmic radiation
• A New Era in the Quest for Dark Matter
• Search for a dark photon in e+e- collisions at BABAR
• The non-gravitational interactions of dark matter in colliding galaxy clusters
• Light ring stability in ultra-compact objects
• Light rings as observational evidence for event horizons: long-lived modes, ergoregions and nonlinear instabilities of ultracompact objects
• Search for ultralight scalar dark matter with atomic spectroscopy
• Search for invisible decays of sub-GeV dark photons in missing-energy events at the CERN SPS
• Illuminating the Hidden Sector of String Theory by Shining Light through a Magnetic Field
• A filament of dark matter between two clusters of galaxies
• Detecting Dark Matter with Imploding Pulsars in the Galactic Center
• An experiment to search for dark matter interactions using sodium iodide detectors
• Dark Matter-induced Collapse of Neutron Stars: A Possible Link Between Fast Radio Bursts and the Missing Pulsar Problem
• Particle dark matter searches outside the Local Group
• Sharp bounds on 2m/r for static spherical objects
• Charged massive scalar field configurations supported by a spherically symmetric charged reflecting shell
• No nonminimally coupled massless scalar hair for spherically symmetric neutral reflecting stars
• A particle dark matter footprint on the first generation of stars
• Upper bound on the gravitational masses of stable spatially regular charged compact objects
• Upper bound on the radii of regular ultra-compact star photonspheres

Cited by in corpus (11)

• 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
• Analytical investigations on formations of hairy neutral reflecting shells in the scalar-Gauss-Bonnet gravity
• 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