Effect of hyperons on f-mode oscillations in Neutron Stars. (arXiv:2011.02204v2 [astro-ph.HE] UPDATED)

Effect of hyperons on f-mode oscillations in Neutron Stars. (arXiv:2011.02204v2 [astro-ph.HE] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Pradhan_B/0/1/0/all/0/1">Bikram Keshari Pradhan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chatterjee_D/0/1/0/all/0/1">Debarati Chatterjee</a>

As the densities in the interior of neutron stars exceed those of terrestrial
nuclear experiments, they provide a scope for studying the nature of dense
matter under extreme conditions. The composition of the inner core of neutron
stars is highly uncertain, and it is speculated that exotic forms of matter
such as hyperons may appear there. Gravitational waves emitted by unstable
oscillation modes in neutron stars contain information about their interior
composition and therefore allow us to probe the interior directly. Recently, a
systematic investigation of f-mode oscillations in neutron stars revealed the
role of the uncertainty in nuclear saturation parameters, particularly the
effective nucleon mass, on its frequency. In this work, we study the influence
of the appearance of hyperons on f-mode oscillation frequencies and therefore
on the emission of gravitational waves. We also speculate whether a future
detection of f-mode frequencies could provide a possibility of probing the
presence of hyperons in the neutron star core.

As the densities in the interior of neutron stars exceed those of terrestrial
nuclear experiments, they provide a scope for studying the nature of dense
matter under extreme conditions. The composition of the inner core of neutron
stars is highly uncertain, and it is speculated that exotic forms of matter
such as hyperons may appear there. Gravitational waves emitted by unstable
oscillation modes in neutron stars contain information about their interior
composition and therefore allow us to probe the interior directly. Recently, a
systematic investigation of f-mode oscillations in neutron stars revealed the
role of the uncertainty in nuclear saturation parameters, particularly the
effective nucleon mass, on its frequency. In this work, we study the influence
of the appearance of hyperons on f-mode oscillation frequencies and therefore
on the emission of gravitational waves. We also speculate whether a future
detection of f-mode frequencies could provide a possibility of probing the
presence of hyperons in the neutron star core.

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