论文标题
通过短伽马射线爆发残留物的重力波辐射来限制状态的核方程
Constraining the nuclear equation of state via gravitational-wave radiation of short gamma-ray burst remnants
论文作者
论文摘要
在某些短GRB中观察到的X射线发射的内部平台表明，在双中性恒星（NS）合并后形成了残留的超质量磁力。在本文中，我们假设旋转能主要是通过重力波（GW）辐射而不是磁偶极子（MD）辐射丢失，并且通过质量四极杆变形和磁力的R模式流体介绍了对状态NS核方程（EOS）的进一步限制。我们提出了两个短的GRB，带有测量的红移，101219a和160821b，其X射线光曲线表现出内部高原。这表明，超级NS可以作为中央发动机生存。通过考虑十二个NS EOSS，在质量四极变形的情况下，我们发现GM1，DD2和DDME2模型给出了$ M _ {\ rm P} $ band band band属于$ \ varepsilon = 0.01 $ \ varepsilon proto-magnetar质量分布的2 $σ$区域。这与旋转能量损失的MD辐射主导的模型的约束是一致的。但是，对于具有$α= 0.1 $的R模式流体振荡模型，数据表明NS EOS接近SHEN和APR模型，该模型与MD辐射显然不同于MD辐射和质量四极杆变形案例。
The observed internal plateau of X-ray emission in some short GRBs suggests the formation of a remnant supra-massive magnetar following a double neutron star (NS) merger. In this paper, we assume that the rotational energy is lost mainly via gravitational wave (GW) radiation instead of magnetic dipole (MD) radiation, and present further constraints on the NS nuclear equation of state (EoS) via mass quadrupole deformation and r-mode fluid oscillations of the magnetar. We present two short GRBs with measured redshifts, 101219A and 160821B, whose X-ray light curves exhibit an internal plateau. This suggests that a supra-massive NS may survive as the central engine. By considering twelve NS EoSs, within the mass quadrupole deformation scenario we find that the GM1, DD2, and DDME2 models give an $M_{\rm p}$ band falling within the 2$σ$ region of the proto-magnetar mass distribution for $\varepsilon=0.01$. This is consistent with the constraints from the MD radiation dominated model of rotational energy loss. However, for an r-mode fluid oscillation model with $α=0.1$ the data suggest that the NS EOS is close to the Shen and APR models, which is obviously different from the MD radiation dominated and mass quadrupole deformation cases.
