Abstract
We review particle-like configurations of complex scalar field, localized by gravity, so-called boson stars. In the simplest case, these solutions posses spherical symmetry, they may arise in the massive Einstein-Klein-Gordon theory with global \(U(1)\) symmetry, as gravitationally bounded lumps of scalar condensate. Further, there are spinning axially symmetric boson stars which possess non-zero angular momentum, and a variety of non-trivial multipolar stationary configurations without any continuous symmetries. In this short overview we discuss important dynamic properties of the boson stars, concentrating on recent results on the construction of multicomponent constellations of boson stars.
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Acknowledgements
Ya.S. gratefully acknowledges the networking support by the COST Actions CA16104. This work was supported in part by the Ministry of Science and High Education of Russian Federation, project FEWF-2020–0003 and by the BLTP JINR Heisenberg-Landau program 2020.
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Shnir, Y. (2023). Boson Stars. In: Pfeifer, C., Lämmerzahl, C. (eds) Modified and Quantum Gravity. Lecture Notes in Physics, vol 1017. Springer, Cham. https://doi.org/10.1007/978-3-031-31520-6_10
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