RAPIDLY ROTATING COOL NEUTRON-STARS

Citation
Ag. Aksenov et al., RAPIDLY ROTATING COOL NEUTRON-STARS, ASTRONOM ZH, 72(5), 1995, pp. 717-732
Citations number
37
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ASTRONOMICESKIJ ZURNAL
ISSN journal
00046299 → ACNP
Volume
72
Issue
5
Year of publication
1995
Pages
717 - 732
Database
ISI
SICI code
0004-6299(1995)72:5<717:RRCN>2.0.ZU;2-7
Abstract
Stationary models for cool rapidly rotating neutron stars are construc ted. Axially symmetric case in Newtonian approximation is considered a nd general relativity effects are evaluated. The chosen barotropic equ ation of state and rotation law determine state of the star at a given mass M and angular momentum J. The region of parameters M and J is ob tained which provide loss of dynamical stability of the star (fragment ation) when the ratio of rotational energy to gravitational energy bet a > 0.27, and which are allowed for a collapsing star; in this region one may expect two-stage collapse and explosion to occur. Ln particula r, it is shown that these conditions are fulfilled for a collapsing ir on-oxygen stellar core with a mass of 2M. which is described by a soli d-body rotating polytrope n = 3 having a maximum possible angular velo city and being marginally stable relative to the collapse.