https://doi.org/10.1140/epja/s10050-023-01119-z
Regular Article - Theoretical Physics
Radial oscillations of neutron stars with antikaon condensate
1
Government General Degree College, Singur, Jalaghata, 712409, Hooghly, West Bengal, India
2
Space sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, Bât. B5a, 4000, Liège, Belgium
Received:
14
May
2023
Accepted:
25
August
2023
Published online:
9
September
2023
In this article, we study the neutron stars with antikaon condensates and their radial oscillations. We incorporate the antikaons 
within a relativistic mean field theory with density dependent couplings. A transition to the kaon condensed phase is treated as a second order phase transition for different possible antikaon optical potentials. Then, we solve the structure equations of stars and calculate the fundamental and higher order frequencies of their radial pulsations. We study the eigenfunctions of different radial modes for a 
star with equations of state having different potential depths of antikaons. We also study the large frequency separations for the star. We find distinct features of the appearances of antikaons on the eigenfunctions. The shape of the eigenfunctions corresponding to the radial perturbations is affected due to the appearance of the antikaons, but for the pressure perturbation, the shape remains unchanged.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
