Bulk viscosity of baryonic matter with trapped neutrinos

被引:50
作者
Alford, Mark [1 ]
Harutyunyan, Arus [2 ,3 ]
Sedrakian, Armen [4 ,5 ]
机构
[1] Washington Univ, Dept Phys, St Louis, MO 63130 USA
[2] Byurakan Astrophys Observ, Byurakan 0213, Armenia
[3] Yerevan State Univ, Alek Manukyan 1, Yerevan 0025, Armenia
[4] Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany
[5] Univ Wroclaw, Inst Theoret Phys, PL-50204 Wroclaw, Poland
关键词
NEUTRON-STAR CORES; URCA PROCESSES; HOT;
D O I
10.1103/PhysRevD.100.103021
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study bulk viscosity arising from weak current Urca processes in dense baryonic matter at and beyond nuclear saturation density. We consider the temperature regime where neutrinos are trapped and therefore have nonzero chemical potential. We model the nuclear matter in a relativistic density functional approach, taking into account the trapped neutrino component. We find that the resonant maximum of the bulk viscosity would occur at or below the neutrino trapping temperature, so in the neutrino trapped regime the bulk viscosity decreases with temperature as T-2, this decrease being interrupted by a drop to zero at a special temperature where the proton fraction becomes density-independent and the material scale-invariant. The bulk viscosity is larger for matter with lower lepton fraction, i.e., larger isospin asymmetry. We find that bulk viscosity in the neutrino-trapped regime is smaller by several orders of magnitude than in the neutrino-transparent regime, which implies that bulk viscosity in neutrino-trapped matter is probably not strong enough to affect significantly the evolution of neutron star mergers. This also implies weak damping of gravitational waves emitted by the oscillations of the post-merger remnant in the high-temperature, neutrino-trapped phase of evolution.
引用
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页数:26
相关论文
共 65 条
[1]   GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral [J].
Abbott, B. P. ;
Abbott, R. ;
Abbott, T. D. ;
Acernese, F. ;
Ackley, K. ;
Adams, C. ;
Adams, T. ;
Addesso, P. ;
Adhikari, R. X. ;
Adya, V. B. ;
Affeldt, C. ;
Afrough, M. ;
Agarwal, B. ;
Agathos, M. ;
Agatsuma, K. ;
Aggarwal, N. ;
Aguiar, O. D. ;
Aiello, L. ;
Ain, A. ;
Ajith, P. ;
Allen, B. ;
Allen, G. ;
Allocca, A. ;
Altin, P. A. ;
Amato, A. ;
Ananyeva, A. ;
Anderson, S. B. ;
Anderson, W. G. ;
Angelova, S. V. ;
Antier, S. ;
Appert, S. ;
Arai, K. ;
Araya, M. C. ;
Areeda, J. S. ;
Arnaud, N. ;
Arun, K. G. ;
Ascenzi, S. ;
Ashton, G. ;
Ast, M. ;
Aston, S. M. ;
Astone, P. ;
Atallah, D. V. ;
Aufmuth, P. ;
Aulbert, C. ;
AultONeal, K. ;
Austin, C. ;
Avila-Alvarez, A. ;
Babak, S. ;
Bacon, P. ;
Bader, M. K. M. .
PHYSICAL REVIEW LETTERS, 2017, 119 (16)
[2]   Bulk viscosity due to kaons in color-flavor-locked quark matter [J].
Alford, Mark G. ;
Braby, Matt ;
Reddy, Sanjay ;
Schafer, Thomas .
PHYSICAL REVIEW C, 2007, 75 (05)
[3]   Bulk viscosity in 2SC quark matter [J].
Alford, Mark G. ;
Schmitt, Andreas .
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2007, 34 (01) :67-101
[4]   Damping of density oscillations in neutrino-transparent nuclear matter [J].
Alford, Mark G. ;
Harris, Steven P. .
PHYSICAL REVIEW C, 2019, 100 (03)
[5]   β equilibrium in neutron-star mergers [J].
Alford, Mark G. ;
Harris, Steven P. .
PHYSICAL REVIEW C, 2018, 98 (06)
[6]   Viscous Dissipation and Heat Conduction in Binary Neutron-Star Mergers [J].
Alford, Mark G. ;
Bovard, Luke ;
Hanauske, Matthias ;
Rezzolla, Luciano ;
Schwenzer, Kai .
PHYSICAL REVIEW LETTERS, 2018, 120 (04)
[7]   Phase conversion dissipation in multicomponent compact stars [J].
Alford, Mark G. ;
Han, Sophia ;
Schwenzer, Kai .
PHYSICAL REVIEW C, 2015, 91 (05)
[8]   Large amplitude behavior of the bulk viscosity of dense matter [J].
Alford, Mark G. ;
Mahmoodifar, Simin ;
Schwenzer, Kai .
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2010, 37 (12)
[9]   Leptonic contribution to the bulk viscosity of nuclear matter [J].
Alford, Mark G. ;
Good, Gerald .
PHYSICAL REVIEW C, 2010, 82 (05)
[10]   Bulk viscosity in kaon-condensed color-flavor-locked quark matter [J].
Alford, Mark G. ;
Braby, Matt ;
Schmitt, Andreas .
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2008, 35 (11)