论文标题
强磁性中子星的热演化和斧头发射特性
Thermal Evolution and Axion Emission Properties of Strongly Magnetized Neutron Stars
论文作者
论文摘要
紧凑型天体物理物体（例如中子星（NS））的发射特性与关键的天文观察物有关。在当前的工作中，我们使用改良的Tolman oppenheimer volkoff（TOV）在存在强烈磁场的情况下获得了非旋转NS的质量，压力曲线。我们通过在修改的TOV方程中使用特定距离依赖性磁场来获得轮廓。我们采用三种不同的状态方程（EOS）来通过假设NSS的核心包含HADRONIC物质来求解TOV方程。使用上述轮廓，我们确定球形对称NSS的冷却速率，随着和不包括磁场使用NScool代码的时间。我们还确定了三种不同NS的冷却速率与半径的函数。此外，我们确定在存在和不存在轴质量$ 16 $ MEV和三个不同EOS的磁场的情况下，NSS发出的中微子，轴和光子的光度。我们的比较研究表明，由于强磁场的影响，中微子，轴和光子的冷却速率和亮度发生了显着变化。我们还发现，由于磁场，与没有磁场相比，轴突质量结合略有增加。
Emission properties of compact astrophysical objects such as Neutron stars (NSs) are associated with crucial astronomical observables. In the current work, we obtain the mass, pressure profiles of the non-rotating NSs using the modified Tolman Oppenheimer Volkoff (TOV) system of equations in the presence of intense magnetic field. We obtain the profiles by using a specific distance-dependent magnetic field in the modified TOV equations. We employ three different equations of states (EoS) to solve the TOV equations by assuming the core of NSs comprises a hadronic matter. Employing the above profiles, we determine the cooling rates of spherically symmetric NSs as a function of time with and without including the magnetic field using the NSCool code. We have also determined the cooling rates as a function of radius for three different NSs. Furthermore, we determine the luminosity of neutrinos, axions, and photons emitting from the NSs in the presence and absence of a magnetic field for an axion mass $16$ meV and three different EoS. Our comparative study indicates that the cooling rate and luminosities of neutrinos, axions, and photons change significantly due to the impact of the strong magnetic field. We also find that due to the magnetic field, the axion mass bound increases slightly compared to without a magnetic field..
