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http://hdl.handle.net/10773/39456
Title: | Stability and physical properties of spherical excited scalar boson stars |
Author: | Brito, Marco Herdeiro, Carlos Radu, Eugen Sanchis-Gual, Nicolas Zilhão, Miguel |
Issue Date: | 15-Apr-2023 |
Publisher: | American Physical Society |
Abstract: | We study the time evolution of spherical, excited -- with $n$ radial nodes -- scalar boson stars in General Relativity minimally coupled to a complex massive scalar field with quartic self-interactions. We report that these stars, with up to $n=10$, can be made dynamically stable, up to timescales of $t\sim\frac{10^{4}}{c\mu}$, where $\mu$ is the inverse Compton wavelength of the scalar particle, for sufficiently large values of the self-interactions coupling constant $\lambda$, which depend on $n$. We observe that the compactness of these solutions is rather insensitive to $n$, for large $\lambda$ and fixed frequency. Generically, along the branches where stability was studied, these excited boson stars are not compact enough to allow for innermost stable circular orbits or light rings. Finally, we discuss the angular velocity of particles along timelike circular orbits, suggesting an application, for solutions in the Newtonian limit, to galactic rotation curves. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/39456 |
DOI: | 10.1103/PhysRevD.107.084022 |
ISSN: | 2470-0010 |
Appears in Collections: | CIDMA - Artigos DMat - Artigos |
Files in This Item:
File | Description | Size | Format | |
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2302.08900.pdf | 936.65 kB | Adobe PDF | View/Open |
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