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EXTREMELY RAPID BURSTS OF TEV PHOTONS FROM THE ACTIVE GALAXY MARKARIAN 421

机译:活跃的银河马尔加尔人421的TEV光子的快速爆发

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DISCRETE astronomical sources of photons in the TeV energy range are believed to be associated with regions in the relativistic outflow of particles and radiation from compact objects, such as neutron stars and black holes. The Bur from such sources, together with the timescales on which they vary, can provide strong constraints on the emission mechanisms. Here we report the observation of two dramatic outbursts of TeV photons from the active galaxy Markarian 421 (Mrk421). In the first outburst, which had a doubling time of about one hour, the flux increased above the relatively quiescent value by more than a factor of 50, briefly making Mrk421 the brightest TeV source in the sky. In the second outburst, which lasted approximately 30 minutes, the flux increased by a factor of 20-25. These data suggest that the emission region is extremely small-perhaps even smaller than our Solar System. This could prove challenging for current theoretical models of such emissions. [References: 18]
机译:在TeV能量范围内,离散的天文光子源被认为与相对论中粒子和来自紧凑物体(例如中子星和黑洞)的辐射的相对流出区域有关。来自这些来源的Bur,以及它们变化的时间尺度,可以对排放机制提供强大的约束。在这里,我们报告了来自活跃星系Markarian 421(Mrk421)的两个TeV光子爆发的观察。在第一次爆发中,它的倍增时间约为一小时,其通量增加到相对静止值以上的50倍以上,使Mrk421短暂地成为天空中最亮的TeV来源。在持续约30分钟的第二次爆发中,流量增加了20-25倍。这些数据表明,发射区域非常小,甚至可能比我们的太阳系小。对于目前这种排放的理论模型,这可能证明是具有挑战性的。 [参考:18]

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