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arXiv 1105.3302astro-ph.HEastro-ph.CO
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双星中子星合并的余辉

Afterglow of binary neutron star merger

Masaru Shibata, Yudai Suwa, Kenta Kiuchi, Kunihito Ioka

摘要:

两颗中子星的合并通常会产生一颗快速旋转的超大质量中子星(HMNS)。我们通过数值相对论模拟表明,这种HMNS周围的磁场轮廓在其随后的演化过程中动态变化,因此,重子发射出具有~ 0.1 B^2 R^3 Omega的大亮度电磁辐射(B、R和Omega是极向磁场强度)HMNS的表面、恒星半径和角速度)。电磁辐射主要沿磁偶极方向发射,其预测光度为~ 10^{47}(B/10^{13} G)^2(R/10 km)^3(Omega/10^4 rad/s)ergs/s,与类星体的光度相当。

英文摘要:

The merger of two neutron stars results often in a rapidly and differentially rotating hypermassive neutron star (HMNS). We show by numerical-relativity simulation that the magnetic-field profile around such HMNS is dynamically varied during its subsequent evolution, and as a result, electromagnetic radiation with a large luminosity ~ 0.1 B^2 R^3 Omega is emitted with baryon (B, R, and Omega are poloidal magnetic-field strength at stellar surface, stellar radius, and angular velocity of a HMNS). The predicted luminosity of electromagnetic radiation, which is primarily emitted along the magnetic-dipole direction, is ~ 10^{47} (B/10^{13} G)^2(R/10 km)^3(Omega/10^4 rad/s) ergs/s, that is comparable to the luminosity of quasars.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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