蟹状星云脉冲星射电巨脉冲与Chandra光子的相关
Correlation of Chandra photons with the radio giant pulses from the Crab pulsar
摘要：
在1.5 GHz的绿岸望远镜和主要在1.5-4.5 keV能量范围内的钱德拉X射线天文台进行的5.4小时的同时观测中，没有发现蟹状星云脉冲星的巨脉冲和X射线光子之间存在明显的相关性。在蟹状星云脉冲星周期内，主脉冲（MP）和脉冲间（IP）的射电辐射相位窗口X射线通量变化不超过± 10%和± 30%。在巨脉冲期间，MP GP的X射线通量变化不超过2倍，IP GP的变化不超过5倍。引用的所有限制都与随机到达时间的假GP集周围的X射线通量的2-sigma波动兼容。结果表明，等离子体相干性的变化是GP的起源。然而，如果发出相干射电辐射的粒子大多处于最低朗道能级，则结果并不排除粒子产生速率的变化。
英文摘要：
No apparent correlation was found between giant pulses (GPs) and X-ray photons from the Crab pulsar during 5.4 hours of simultaneous observations with the Green Bank Telescope at 1.5 GHz and Chandra X-Ray Observatory primarily in the energy range 1.5-4.5 keV. During the Crab pulsar periods with GPs the X-ray flux in radio emission phase windows does not change more than by +-10% for main pulse (MP) GPs and +-30% for interpulse (IP) GPs. During giant pulses themselves, the X-ray flux does not change more than by two times for MP GPs and 5 times for IP GPs. All limits quoted are compatible with 2-sigma fluctuations of the X-ray flux around the sets of false GPs with random arrival times. The results speak in favor of changes in plasma coherence as the origin of GPs. However, the results do not rule out variations in the rate of particle creation if the particles that emit coherent radio emission are mostly at the lowest Landau level.
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