Dynamical evolution of fermion-boson stars
| Autor: | Daniela Alic, Susana Valdez-Alvarado, Carlos Palenzuela, L. Arturo Ureña-López |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Nuclear and High Energy Physics Particle physics Cosmology and Nongalactic Astrophysics (astro-ph.CO) Hot dark matter Dark matter Scalar field dark matter FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics General Relativity and Quantum Cosmology Gravitation Dark matter halo Neutron star Stars Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Astrophysics::Galaxy Astrophysics Dark fluid Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Physical Review D |
| ISSN: | 1550-2368 1550-7998 |
| DOI: | 10.1103/physrevd.87.084040 |
| Popis: | Compact objects, like neutron stars and white dwarfs, may accrete dark matter, and then be sensitive probes of its presence. These compact stars with a dark matter component can be modeled by a perfect fluid minimally coupled to a complex scalar field (representing a bosonic dark matter component), resulting in objects known as fermion-boson stars. We have performed the dynamical evolution of these stars in order to analyze their stability, and to study their spectrum of normal modes, which may reveal the amount of dark matter in the system. Their stability analysis shows a structure similar to that of an isolated (fermion or boson) star, with equilibrium configurations either laying on the stable or on the unstable branch. The analysis of the spectrum of normal modes indicates the presence of new oscillation modes in the fermionic part of the star, which result from the coupling to the bosonic component through the gravity. 13 pages, 9 figures. Replaced with the journal final version |
| Databáze: | OpenAIRE |
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