Limiting Rotation Rate of Neutron Stars from Crust Breaking and Gravitational Waves

Autor:	Morales, J. A., Horowitz, C. J.
Rok vydání:	2024
Předmět:	Astrophysics - High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology Nuclear Theory
Druh dokumentu:	Working Paper
Popis:	Neutron stars are not observed to spin faster than about half their breakup rate. This limiting rotational frequency may be related to the strength of their crusts. As a star spins up from accretion, centrifugal forces stress the crust. We perform finite-element simulations of rotating neutron stars and find that the crust fails at rotation rates about half the breakup rate. We argue that this crust failure is asymmetric and produces a significant ellipticity (fractional difference in moments of inertia). A rotating star, with this ellipticity, radiates gravitational waves that limit further spin up. These stars may be promising sources for LIGO / VIRGO and next generation gravitational wave detectors. Comment: 7 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2410.19111 Zobrazit plný text záznamu View this record from Arxiv