Universal behavior of rotating neutron stars in GR: even simpler than their Newtonian counterparts

Дата и время публикации : 2013-11-21T18:41:21Z

Авторы публикации и институты :
George Pappas
Theocharis A. Apostolatos

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: Main text followed by supplemental material. 11 figures and 4 tables
Первичная категория: gr-qc

Все категории : gr-qc, astro-ph.HE

Краткий обзор статьи: Recently it was shown that slowly rotating neutron stars exhibit an interesting correlation between their moment of inertia $I$, their quadrupole moment $Q$, and their tidal deformation Love number $lambda$ (the I-Love-Q relations), independently of the equation of state of the compact object. This universal behavior has been shown to break down in rapidly rotating neutron stars. In the present work a similar, more general, universality is shown to hold true for all rotating neutron stars within General Relativity; the first four multipole moments of the neutron star have interconnections that are independent of which nuclear matter equation of state we assume. By exploiting this relation, we can describe quite accurately the geometry around a neutron star with fewer parameters, even if we don’t know precisely the equation of state. Furthermore, this universal behavior displayed by neutron stars, could promote them to a more promising class of candidates (next to black holes) for testing theories of gravity.

Category: Physics