GAMMA-RAY BURST AFTERGLOW PLATEAUS AND GRAVITATIONAL WAVES: MULTI-MESSENGER SIGNATURE OF A MILLISECOND MAGNETAR?
GAMMA-RAY BURST AFTERGLOW PLATEAUS AND GRAVITATIONAL WAVES: MULTI-MESSENGER SIGNATURE OF A MILLISECOND MAGNETAR?
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DOI：
10.1088/0004-637x/702/2/1171
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发表时间：
2009-07
期刊：
影响因子：
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通讯作者：
A. Corsi;P. Mészáros
中科院分区：
文献类型：
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作者：
A. Corsi;P. Mészáros
在伽马射线暴的早期X射线余辉中存在浅衰变阶段是一个常见的特征。在这里，我们调查了一种可能性，即这与一颗高度磁化的毫秒脉冲星的形成有关，该脉冲星以比瞬时发射更长的时间尺度向火球注入能量。在这种情况下，新生的中子星可能会经历长期的杆模不稳定，导致引力波损失，这将影响中子星的自转。在这种情况下，附近各向同性能量约为1050尔格的伽马射线暴将在几分钟到大约一小时的较长时间尺度上，产生与观测到的X射线光曲线平台相关的可探测到的引力波信号。相对于伽马射线暴触发，引力波信号的峰值将被延迟，这为诸如先进的LIGO和室女座引力波干涉仪提供了在飞行中捕捉其特征的具有挑战性的可能性。
The existence of a shallow decay phase in the early X-ray afterglows of gamma-ray bursts is a common feature. Here we investigate the possibility that this is connected to the formation of a highly magnetized millisecond pulsar, pumping energy into the fireball on timescales longer than the prompt emission. In this scenario, the nascent neutron star could undergo a secular bar-mode instability, leading to gravitational wave losses which would affect the neutron star spin-down. In this case, nearby gamma-ray bursts with isotropic energies of the order of 1050 ergs would produce a detectable gravitational wave signal emitted in association with an observed X-ray light-curve plateau, over relatively long timescales of minutes to about an hour. The peak amplitude of the gravitational wave signal would be delayed with respect to the gamma-ray burst trigger, offering gravitational wave interferometers such as the advanced LIGO and Virgo the challenging possibility of catching its signature on the fly.