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arXiv 0709.4298astro-ph
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用VERITAS观测超新星遗迹IC 443

Observation of the Supernova Remnant IC 443 with VERITAS

VERITAS Collaboration, T. B. Humensky

摘要:

壳型超新星遗迹(SNRs)在膨胀的遗迹和扫起的星际介质之间的激波前沿加速粒子。如果这些粒子包括质子和原子核,那么极高能量的伽马射线发射可能是由宇宙射线与本地星际介质相互作用产生的π介子衰变引起的。对于与附近的分子云(例如IC 443)相互作用的SNR,增强的物质密度提供了可以放大伽马射线发射的目标介质。IC 443还包含脉冲星风星云(PWN)CXNOJ 061705.3 +222127。PWNe是银河系中最丰富的甚高能伽马射线源,它产生于脉冲星风与周围介质碰撞时形成的激波。VERITAS是一个由四个12米望远镜组成的阵列,专门用于100 GeV以上能带的伽马射线天文学。位于Mt。位于亚利桑那州南部的霍普金斯,VERITAS在2006-2007赛季期间以2-,3-和4-望远镜观测模式运行。在这个演讲中,来自三个望远镜的观测结果的复合超新星遗迹IC 443在2006-2007赛季进行了讨论。

英文摘要:

Shell-type supernova remnants (SNRs) accelerate particles at the shock front between the expanding remnant and the swept-up interstellar medium. If these particles include protons and nuclei, very-high-energy gamma-ray emission may result from the decay of pions produced in interactions between cosmic rays and the local insterstellar medium. For SNRs that are interacting with a nearby molecular cloud, such as IC 443, the enhanced matter density provides a target medium that can amplify the gamma-ray emission. IC 443 also contains the pulsar wind nebula (PWN) CXOU J061705.3+222127. PWNe are the most plentiful galactic sources of very-high-energy gamma rays, which are produced in the shock formed at the collision of the pulsar wind with the ambient medium. VERITAS is an array of four 12-m telescopes dedicated to gamma-ray astronomy in the energy band above 100 GeV. Located on Mt. Hopkins in southern Arizona, VERITAS operated during the 2006-2007 season in 2-, 3-, and 4-telescope observation modes. In this talk, results from three-telescope observations of the composite supernova remnant IC 443 during the 2006-2007 season are discussed.

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