BS1 - Black Hole foils, Boson stars |
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Speaker |
Marunovic, Anja |
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Coauthors |
Horvat, Dubravko; Marunovic, Anja |
| Talk Title |
Boson stars with nonminimal coupling |
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Abstract |
The oldest, and accordingly the most studied, astrophysical example based on the Lagrangian formalism, is the boson star, which is a compact object built from a self-interacting, gravitationally bound scalar field. It is known that boson stars coupled to Einstein’s general relativity possess some features that characterize gravastars, such as the anisotropy in principal pressures and relatively large compactness (μ_max = 0.32). However, no matter how large the self-coupling is, the ordinary boson star cannot attain arbitrarily large compression and as such does not represent a good black hole mimicker. In this talk I will show that when the boson star is nonminimally coupled to gravity, the resulting configurations resemble more the dark energy stars then the ordinary boson stars, with compactness significantly larger then that in ordinary boson stars (if matter is not constrained with the energy conditions). |
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Talk view |
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