Moment of inertia, quadrupole moment, Love number of neutron star and their relations with strange matter equations of state

Abstract

We investigate the impact of strange matter equations of state involving $\Lambda$ hyperons, Bose-Einstein condensate of $K^{-}$ mesons and first order hadron-quark phase transition on moment of inertia, quadrupole moment and tidal deformability parameter of slowly rotating neutron stars. All these equations of state are compatible with the 2 M${}_{solar}$ constraint. The main findings of this investigation are the universality of the I-Q and I-Love number relations, which are preserved by the EoSs including $\Lambda$ hyperons and antikaon condensates, but broken in presence of a first order hadron-quark phase transition. Furthermore, it is also noted that the quadrupole moment approaches the Kerr value of a black hole for maximum mass neutron stars.

8 pages, 10 figures, submitted to EPJA (July, 2017)

References in corpus (10)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
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• Tidal Love numbers of neutron stars
• Constraining neutron star tidal Love numbers with gravitational wave detectors
• New Hyperon Equations of State for Supernovae and Neutron Stars in Density-dependent Hadron Field Theory
• A new temperature dependent hyperonic equation of state: application to rotating neutron star models and I-Q-relations
• Rotating proto-neutron stars: spin evolution, maximum mass and I-Love-Q relations
• Massive Neutron Stars with Antikaon Condensates in a Density Dependent Hadron Field Theory
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• Maximum mass and universal relations of rotating relativistic hybrid hadron-quark stars
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• Investigating Universal Relations in Compact Stars featuring $\Delta -$Admixed Exotic Dense Matter