Role of nucleon-nucleon correlation in transport coefficients and gravitational-wave-driven r-mode instability of neutron stars
Role of nucleon-nucleon correlation in transport coefficients and gravitational-wave-driven r-mode instability of neutron stars
复制标题
核子-核子相关性在中子星输运系数和引力波驱动的 r 模式不稳定性中的作用
DOI：
10.1016/j.physletb.2020.135963
复制
发表时间：
2020-11
期刊：
影响因子：
--
通讯作者：
Dong J.M.
中科院分区：
文献类型：
--
作者：
Shang X.L.;Wang P.;Zuo W.;Dong J.M.
研究了致密核物质的热导率和剪切粘度，以及沿着的正则中子星剪切粘度时标，其中费米面耗尽（即，考虑了核子-核子关联引起的Z因子效应。在Brueckner理论的框架下，计算了影响输运系数的因素，包括建立恒星结构的状态方程、核子有效质量、介质内截面和费米面处的Z因子。在高密度下，费米面耗尽使输运系数提高了数倍，这对抑制NS的引力波驱动模不稳定性更为有利.然而，Z因子淬灭的中子三重态超流性的开始提供了相反的效应，这可能比上面提到的Z因子效应本身更重要。因此，与以往的认识不同，在低温下超流NS物质中，核子剪切粘滞系数仍然小于轻子剪切粘滞系数。因此，即使在相当低的核心温度106 K下，剪切粘度也不能稳定正则NS对strs模式振荡。
The thermal conductivity and shear viscosity of dense nuclear matter, along with the corresponding shear viscosity timescale of canonical neutron stars (NSs), are investigated, where the effect of Fermi surface depletion (i.e., theZ-factor effect) induced by the nucleon-nucleon correlation is taken into account. The factors which are responsible for the transport coefficients, including the equation of state for building the stellar structure, nucleon effective masses, in-medium cross sections, and theZ-factor at Fermi surfaces, are all calculated in the framework of the Brueckner theory. The Fermi surface depletion is found to enhance the transport coefficients by several times at high densities, which is more favorable to damping the gravitational-wave-drivenr-mode instability of NSs. Yet, the onset of theZ-factor-quenched neutron triplet superfluidity provides the opposite effects, which can be much more significant than the above mentionedZ-factor effect itself. Therefore, different from the previous understanding, the nucleon shear viscosity is still smaller than the lepton one in the superfluid NS matter at low temperatures. Accordingly, the shear viscosity cannot stabilize canonical NSs againstr-mode oscillations even at quite low core temperatures 106K.
登录
查看更多内容
DOI：
10.1088/2041-8205/779/1/l4
发表时间：
2013-08
期刊：
The Astrophysical Journal Letters
影响因子：
--
作者：
W. Newton;K. Murphy;J. Hooker;Bao-An Li
通讯作者：
W. Newton;K. Murphy;J. Hooker;Bao-An Li
DOI：
10.1103/physrevc.82.015805
发表时间：
2010-06
期刊：
Phy. Rev. C
影响因子：
--
作者：
H.F. Zhang;U. Lombardo;W. Zuo
通讯作者：
W. Zuo
热致密物质中的核有效质量
影响因子：
3.1
作者：
Shang Xinle;Li Ang;Miao Zhiqiang;Burgio G.-F.;Schulze H-J.
通讯作者：
Schulze H-J.
影响因子：
3.1
作者：
I. Vidaña
通讯作者：
I. Vidaña
DOI：
10.1111/j.1745-3933.2011.01015.x
发表时间：
2010-11
影响因子：
--
作者：
P. Shternin;D. Yakovlev;C. Heinke;W. Ho;D. Patnaude
通讯作者：
P. Shternin;D. Yakovlev;C. Heinke;W. Ho;D. Patnaude