17th International Conference on Topics in Astroparticle and Underground Physics (TAUP 2021)

26 August 2021 to 3 September 2021

A Numerical Study of Oscillations of Highly Magnetized Non-rotating Axisymmetric Neutron Stars

30 Aug 2021, 17:10
50m
Talk in parallel session High Energy Astrophysics, Cosmic Rays and Multimessenger Astronomy

Speaker

Man Yin Leung (Department of Physics, The Chinese University of Hong Kong)

Description

Highly magnetized neutron stars with magnetic fields of $10^{15-16}$ G are promising candidates to be the observed soft gamma repeaters and X-ray pulsars. On the other hand, oscillations of perturbed neutron stars are closely related to the composition, structure, and equation of state of the star. Thus far, the numerical study of oscillations of magnetized neutron stars has not yet realized the observed order of field magnitude. Here, we present a breakthrough by using a multigrid-based general relativistic code, Gmunu, to dynamically simulate the oscillations of highly magnetized non-rotating axisymmetric neutron stars with field strengths of $10^{15-17}$ G under non-linear perturbations. We extract the eigenfrequencies and eigenfunctions of the excited oscillation modes and preliminary results show that the eigenfrequencies decrease with the magnetic to binding energy ratio of the neutron star, implying a suppression of perturbative oscillations in a more magnetized neutron star.

Primary authors

Man Yin Leung (Department of Physics, The Chinese University of Hong Kong) Mr. Patrick Chi-Kit Cheong (Department of Physics, The Chinese University of Hong Kong) Prof. Tjonnie Guang Feng Li (Department of Physics, The Chinese University of Hong Kong)

Presentation Materials

 A Numerical Study of Oscillations of Highly Magnetized Neutron Stars | Leung, M.Y. | TAUP2021 A Numerical Study of Oscillations of Highly Magnetized Non-rotating Axisymmetric Neutron Stars_Leung M.Y._TAUP2021.pdf
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