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Journal Article

Dynamical evolution of fermion-boson stars

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons4301

Palenzuela,  Carlos
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons2709

Alic,  Daniela
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Fulltext (public)

1210.2299
(Preprint), 380KB

PRD87_084040.pdf
(Any fulltext), 507KB

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Citation

Valdez-Alvarado, S., Palenzuela, C., Alic, D., & Ureña-López, L. A. (2013). Dynamical evolution of fermion-boson stars. Physical Review D, 87: 084040. doi:10.1103/PhysRevD.87.084040.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000E-77ED-C
Abstract
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.