Axion stars in MGD background
arXiv:2305.15752 · doi:10.1140/epjc/s10052-023-11731-4
Abstract
The minimal geometric deformation (MGD) paradigm is here employed to survey axion stars on fluid branes. The finite value of the brane tension provides beyond-general relativity corrections to the density, compactness, radius, and asymptotic limit of the gravitational mass function of axion stars, in a MGD background. The brane tension also enhances the effective range and magnitude of the axion field coupled to gravity. MGD axion stars are compatible to mini-massive compact halo objects for almost all the observational range of brane tension, however, a narrow range allows MGD axion star densities large enough to produce stimulated decays of the axion to photons, with no analogy in the general-relativistic (GR) limit. Besides, the gravitational mass and the density of MGD axion stars are shown to be up to four orders of magnitude larger than the GR axion stars, being also less sensitive to tidal disruption events under collision with neutron stars, for lower values of the fluid brane tension.
arXiv comment31 pages, 14 figures
References in corpus (46)
- An Alternative to Compactification
- New Dimensions at a Millimeter to a Fermi and Superstrings at a TeV
- Axions In String Theory
- Brane-World Gravity
- Decoupling gravitational sources in general relativity: from perfect to anisotropic fluids
- Axion Cosmology
- Formation of Solitonic Stars Through Gravitational Cooling
- Decoupling gravitational sources in general relativity: the extended case
- Gravitational Bose-Einstein condensation in the kinetic regime
- Searching Exact Solutions for Compact Stars in Braneworld: a conjecture
- Gravitational decoupled anisotropies in compact stars
- Hairy black holes by gravitational decoupling
- Isotropization and change of complexity by gravitational decoupling
- Anisotropic Tolman VII solution by gravitational decoupling
- Minimal Geometric Deformation in a cloud of strings
- A causal Schwarzschild-de Sitter interior solution by gravitational decoupling
- Brane-world stars with solid crust and vacuum exterior
- The role of exterior Weyl fluids on compact stellar structures in Randall-Sundrum gravity
- Using MGD gravitational decoupling to extend the isotropic solutions of Einstein equations to the anisotropical domain
- A general interior anisotropic solution for a BTZ vacuum in the context of the Minimal Geometric Deformation decoupling approach
- Compact Anisotropic Models in General Relativity by Gravitational Decoupling
- Self-gravitating system made of axions
- Einstein-Klein-Gordon by gravitational decoupling
- Strong Deflection Limit Lensing Effects in the Minimal Geometric Deformation and Casadio-Fabbri-Mazzacurati Solutions
- A way of decoupling gravitational sources in pure Lovelock gravity
- A simple protocol to construct solutions with vanishing complexity by Gravitational Decoupling
- Kerr-de Sitter Black Hole Revisited
- Extended quantum portrait of MGD black holes and information entropy
- Color-flavor locked quark stars in energy-momentum squared gravity
- A simple method to generate exact physically acceptable anisotropic solutions in general relativity
- The minimal of geometric deformation of Yang-Mills-Dirac stellar configurations
- Black string corrections in variable tension braneworld scenarios
- Holographic entanglement entropy under the minimal geometric deformation and extensions
- A static and spherically symmetric hairy black hole in the framework of the Gravitational Decoupling
- Probing the minimal geometric deformation with trace and Weyl anomalies
- Echoes of the gravitational decoupling: scalar perturbations and quasinormal modes of hairy black holes
- Class I polytropes for anisotropic matter
- Gravitational waves and extra dimensions: a short review
- Can the dark matter halo be a collisionless ensemble of axion stars?
- Quasi Normal Modes of hairy black holes at higher--order WKB approach
- Differential configurational entropy and the gravitational collapse of a kink
- Horndeski stars
- Brane World Models Need Low String Scale
- Black holes and nilmanifolds: quasinormal modes as the fingerprints of extra dimensions?
- Space-time singularities and the axion in the Poincare coset models ISO(2,1)/H
- The Poincare' coset models ISO(d-1,1)/R^n and T-duality
Cited by in corpus (4)
- Gravitational decoupling and aerodynamics: black holes and analog gravity in a jet propulsion lab
- Completely Deformed Complexity-free Anisotropic Fluid Sphere
- Gravitational decoupling and regular hairy black holes: Geodesic stability, quasinormal modes, and thermodynamic properties
- Hair imprints of the gravitational decoupling and hairy black hole spectroscopy