Stability and gravitational collapse of neutron stars with realistic equations of state

被引:28
作者
Pretel, J. M. Z. [1 ]
da Silva, M. F. A. [2 ]
机构
[1] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, RI, Brazil
[2] Univ Estado Rio de Janeiro, Dept Fis Teor, BR-20550013 Rio De Janeiro, RJ, Brazil
关键词
equation of state; gravitation; hydrodynamics; instabilities; stars: neutron; APPROACHING SCHWARZSCHILD LIMIT; DYNAMICAL INSTABILITY; RADIAL OSCILLATIONS; MASSES;
D O I
10.1093/mnras/staa1493
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We discuss the stability and construct dynamical configurations describing the gravitational collapse of unstable neutron stars with realistic equations of state compatible with the recent LIGO-Virgo constraints. Unlike other works that consider the collapse of a stellar configuration without a priori knowledge if it is stable or unstable, we first perform a complete analysis on stellar stability for such equations of state. Negative values of the squared frequency of the fundamental mode indicate us radial instability with respect to the collapse of the unstable star to a black hole. We find numerical solutions corresponding to the temporal and radial behaviour during the evolution of the collapse for certain relevant physical quantities such as mass, luminosity, energy density, pressure, heat flow, temperature, and quantities that describe bulk viscous processes. Our results show that the equation of state undergoes abrupt changes close to the moment of event horizon formation as a consequence of dissipative effects. During the collapse process all energy conditions are respected, which implies that our model is physically acceptable.
引用
收藏
页码:5027 / 5039
页数:13
相关论文
共 50 条
[41]   Gravitational instability of finite isothermal spheres in general relativity. Analogy with neutron stars [J].
Chavanis, PH .
ASTRONOMY & ASTROPHYSICS, 2002, 381 (02) :709-730
[42]   Coalescing neutron stars - Gravitational waves from polytropic models [J].
Ruffert, M ;
Rampp, M ;
Janka, HT .
ASTRONOMY & ASTROPHYSICS, 1997, 321 (03) :991-1006
[43]   EQUATION OF STATE FOR MASSIVE NEUTRON STARS [J].
Katayama, Tetsuya ;
Miyatsu, Tsuyoshi ;
Saito, Koichi .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2012, 203 (02)
[44]   Gravitational wave emission from rotating superfluid neutron stars [J].
Jones, D. I. .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2010, 402 (04) :2503-2519
[45]   SPINDOWN OF ISOLATED NEUTRON STARS: GRAVITATIONAL WAVES OR MAGNETIC BRAKING? [J].
Staff, Jan E. ;
Jaikumar, Prashanth ;
Chan, Vincent ;
Ouyed, Rachid .
ASTROPHYSICAL JOURNAL, 2012, 751 (01)
[46]   Information theoretical methods as discerning quantifiers of the equations of state of neutron stars [J].
de Avellar, M. G. B. ;
de Souza, R. A. ;
Horvath, J. E. ;
Paret, D. M. .
PHYSICS LETTERS A, 2014, 378 (47) :3481-3487
[47]   LOCV calculation of the equations of state and properties of rapidly rotating neutron stars [J].
Farajian, A. H. ;
Bigdeli, M. ;
Belbasi, S. .
CHINESE PHYSICS C, 2018, 42 (06)
[48]   LOCV calculation of the equations of state and properties of rapidly rotating neutron stars [J].
A.H.Farajian ;
M.Bigdeli ;
S.Belbasi .
Chinese Physics C, 2018, 42 (06) :132-137
[49]   The Induced Surface Tension Contribution for the Equation of State of Neutron Stars [J].
Sagun, Violetta V. ;
Lopes, Ilidio ;
Ivanytskyi, Aleksei I. .
ASTROPHYSICAL JOURNAL, 2019, 871 (02)
[50]   Gravitational wave signals from the collapse of the first stars [J].
Schneider, R ;
Ferrara, A ;
Ciardi, B ;
Ferrari, V ;
Matarrese, S .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2000, 317 (02) :385-390