Regular Article – Theoretical Physics
Gravitational wave signatures of highly magnetized neutron stars
Centro de Ciências Exatas, Naturais e Tecnológicas - CCENT, Universidade Estadual da Região Tocantina do Maranhão (UEMASUL), CEP 65901-480, Imperatriz, MA, Brazil
2 Centro Federal de Educação Tecnológica de Minas Gerais, Campus VIII, CEP 37022-560, Varginha, MG, Brazil
3 Departamento de Física - CCET, Universidade Federal do Maranhão (UFMA), Campus Universitário do Bacanga, São Luís, MA, Brazil
4 Departamento de Física, Universidade Federal de Santa Catarina (UFSC), CP 476, CEP 88040-900, Florianópolis, SC, Brazil
Accepted: 25 November 2020
Published online: 11 December 2020
Motivated by the recent gravitational wave detection by the LIGO–VIRGO observatories, we study the Love number and dimensionless tidal polarizability of highly magnetized stars. We also investigate the fundamental quasi-normal mode of neutron stars subject to high magnetic fields. To perform our calculations we use the chaotic field approximation and consider both nucleonic and hyperonic stars. As far as the fundamental mode is concerned, we conclude that the role played by the constitution of the stars is far more relevant than the intensity of the magnetic field, and if massive stars are considered, the ones constituted by nucleons only present frequencies somewhat lower than the ones with hyperonic cores. This feature that can be used to point out the real internal structure of neutron stars. Moreover, our studies clearly indicate that strong magnetic fields play a crucial role in the deformability of low mass neutron stars, with possible consequences on the interpretation of the detected gravitational waves signatures.
© The Author(s) 2020
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