Neutron Star Crust Can Support A Large Ellipticity

Autor:	Morales, J. A., Horowitz, C. J.
Rok vydání:	2022
Předmět:	General Relativity and Quantum Cosmology Astrophysics - High Energy Astrophysical Phenomena Nuclear Theory
Zdroj:	MNRAS 517 (2022) 5610
Druh dokumentu:	Working Paper
DOI:	10.1093/mnras/stac3058
Popis:	Non-axisymmetrical deformations of the crust on rapidly rotating neutron stars are one of the main targets of searches for continuous gravitational waves. The maximum ellipticity, or fractional difference in moments of inertia, that can be supported by deformations of the crust (known as "mountains") provides an important upper limit on the strength of these continuous gravitational wave sources. We use the formalism of Gittins et al 2021, along with a deforming force that acts mainly in the transverse direction, to obtain a maximum ellipticity of 7.4$\times$10$^{-6}$. This is larger than the original results of Gittins et al 2021 but consistent with earlier calculations by Ushomirsky et al 2000. This suggests that rotating neutron stars could be strong sources of continuous gravitational waves. Comment: 9 pages, 5 figures, minor revisions MNRAS in press
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2209.03222 Zobrazit plný text záznamu View this record from Arxiv