Probing the central engine of long gamma-ray bursts and hypernovae with gravitational waves and neutrinos
Probing the central engine of long gamma-ray bursts and hypernovae with gravitational waves and neutrinos
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DOI：
10.1103/physrevd.80.123008
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发表时间：
2009-06
影响因子：
5
通讯作者：
Y. Suwa;K. Murase
中科院分区：
文献类型：
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作者：
Y. Suwa;K. Murase
对于长伽马射线暴（GRBs）和超新星（HNe）的中心引擎，中微子湮灭和磁场是两种常见的可行能源候选。我们研究了伴随这两种机制的引力波（GW）发射。特别是，我们专注于来自大质量黑洞周围的高吸积盘的中微子所产生的引力波信号。我们表明，如果中心引擎由中微子供能，对于约1兆秒差距的事件，激光干涉空间天线（LISA）能够探测到中微子引发的引力波，而对于约100兆秒差距的事件，分赫兹干涉引力波天文台（DECIGO）/大爆炸观测者（BBO）能够探测到。引力波信号取决于观测角度，并且与中微子信号呈反相关。但是，同时探测到中微子也是有可能的，并且当后续的电磁观测使我们能够确定源时，这对诊断爆炸机制是有帮助的。引力波和中微子观测对于探测不产生即时辐射的受阻喷流以及成功的喷流可能是有用的。即使在未探测到的情况下，引力波和中微子的观测也可能对伽马射线暴和超新星的中心引擎产生有益的启示。
There are the two common candidates as the viable energy source for the central engine of long gamma-ray bursts (GRBs) and hypernovae (HNe), neutrino annihilation and magnetic fields. We investigate gravitational wave (GW) emission accompanied by these two mechanisms. Especially, we focus on GW signals produced by neutrinos from a hyper-accreting disk around a massive black hole. We show that neutrino-induced GWs are detectable for {approx}1 Mpc events by LISA and {approx}100 Mpc by DECIGO/BBO, if the central engine is powered by neutrinos. The GW signals depend on the viewing angle and they are anticorrelated with neutrino ones. But, simultaneous neutrino detections are also expected, and helpful for diagnosing the explosion mechanism when later electromagnetic observations enable us to identify the source. GW and neutrino observations are potentially useful for probing choked jets that do not produce prompt emission, as well as successful jets. Even in nondetection cases, observations of GWs and neutrinos could lead to profitable implications for the central engine of GRBs and HNe.