Cartan $F(R)$ gravity introduces the equivalent scalar-tensor theory by extending the gravity sector. From the solution of the modified Cartan equation leads to the interaction with the scalar field and the fermion. We derived the effective potential of the scalar field using the auxiliary field method, which is commonly used in studies of spontaneous chiral symmetry breaking. Using this effective potential we investigated the mass-radius relation of neutron star to solve the Tolman-Oppenheimer-Volkoff equation. By the numerical computation, we found that the contribution of the scalar field increases the mass of a neutron star. This could give theoretical plausibility to the current observations.
Determination of the internal structure of neutron stars from gravitational wave spectra
本文从中子星的引力波谱中推断出中子星的内部结构。迭代应用Tsui和Leung提出的中子星标度坐标对数微扰法的逆格式[Astrophys. J. { \bf 631},495(2005)],我们能够从恒星脉动的准简正模频率确定恒星的质量、半径和质量分布。此外,这种反演方案还可以得到精确的核物质物态方程。本文导出了轴向$w$模振荡的显式公式,并给出了不同状态方程表征的中子星的数值结果。
EMRI Dephasing from a Torsion-Inspired Near-Zone Kerr Deformation: Motivated by Spin-Polarized Dark Matter
Faculty of Physics, Lomonosov Moscow State University(莫斯科国立大学物理系);International School, I.M. Sechenov First Moscow State Medical University(伊万·谢切诺夫第一莫斯科国立医科大学国际学院);Steklov Mathematical Institute, Russian Academy of Sciences(俄罗斯科学院斯捷克洛夫数学研究所)
Bayesian Inference of Neutron Star Properties in $f(Q)$ Gravity Using NICER Observations
Birla Institute of Technology and Science-Pilani, Hyderabad Campus(印度理工学院比拉学院海德拉巴校区);The Chinese University of Hong Kong, Shenzhen (CUHK-Shenzhen)(香港中文大学(深圳))
Emergent Einstein-Cartan gravity from a spinor loop
Center for Theoretical Physics and College of Physics, Jilin University(吉林大学理论物理中心及物理学院);Department of Information and Mathematical Sciences, Tokyo Woman’s Christian University(东京女子基督教大学信息数学科学系);Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics (MOE), Central China Normal University(华中师范大学粒子物理研究所及夸克与轻子物理教育部重点实验室);State Key Laboratory of Nuclear Physics and Technology, Institute of Quantum Matter, South China Normal University(华南师范大学量子物质研究院及核物理与技术国家重点实验室);Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter, Guangdong Provincial Key Laboratory of Nuclear Science(广东省物质结构与基本相互作用卓越基础研究中心及广东省核科学重点实验室);Department of Physics and Astronomy, Kwansei Gakuin University(关西学院大学物理天文学系)
我们给一个简短的大纲,在第二节。2,规范思想应用于内部($U(1),\, SU(2),\dots$)和外部($R^4,\,SO(1,3),\dots$)对称性的历史发展,并强调相应守恒流的根本重要性。在第二节中,3.中子干涉仪在地球引力场中的实验结果,用等效原理解释,可以用加速旋转参考系中的狄拉克方程预言。在这样一个非惯性系中使用狄拉克方程,我们描述了如何在规范理论的方法(见表1)中,存在于包含挠率和曲率的黎曼-嘉当时空中的爱因斯坦-嘉当理论作为最简单的引力理论而产生。这与爱因斯坦在黎曼时空中得出广义相对论的方法相反。以秒为单位。\在图4和图5中,我们考虑了物质的守恒能量-动量流,并对相关的平移子群进行了测量。爱因斯坦的远程平行理论的出现被证明是等价的,为无自旋的物质和电磁,广义相对论。在成功地规范了平移之后,就可以直接规范四维仿射群$R^4 \semidirect GL(4,R)$或它的庞加莱子群$R^4\semidirect SO(1,3)$。我们在第二节中简要报告了这些结果。6(metric-affine geometry)and in Sec. 7(度量仿射场方程(\ref{zeroth},\ref{first},\ref{second}))。最后,在SEC。8,我们收集了一些模型,目前正在讨论中,它带来了生命的度量仿射规范框架开发。
Sensitivity of neutron star observables to microscopic nuclear parameters of realistic equations of state
The Grainger College of Engineering, Illinois Center for Advanced Studies of the Universe, Department of Physics, University of Illinois at Urbana-Champaign(伊利诺伊大学厄巴纳-香槟分校);Center for Nuclear Research, Department of Physics, Kent State University(肯特州立大学)
Universal description of the Neutron Star's surface and its key global properties: A Machine Learning Approach for nonrotating and rapidly rotating stellar models
Self-consistent treatment of thermal effects in neutron-star post-mergers: observational implications for third-generation gravitational-wave detectors
该研究利用数值相对论模拟和贝叶斯模型选择,量化有限温度 EoS 与混合表示在 BNS 并合后引力波信号中的差异,证明第三代探测器可在数十至百 Mpc 尺度识别热效应建模影响。
Dynamical tidal response of neutron stars: From effective field theory to gravitational waveforms
Université Paris Cité(巴黎西岱大学);CNRS(法国国家科学研究中心);Johns Hopkins University(约翰斯·霍普金斯大学);Università di Pisa(比萨大学);INFN, Sezione di Pisa(意大利国家核物理研究所比萨分部);Sapienza Università di Roma(罗马第一大学);INFN, Sezione di Roma(意大利国家核物理研究所罗马分部)