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arXiv 0709.3975astro-ph
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用VERITAS成像大气切伦科夫望远镜阵观测脉冲星风星云

Observations of Pulsar Wind Nebulae with the VERITAS Array of Imaging Atmospheric Cherenkov Telescopes

A. Konopelko

摘要:

许多最近发现的银河系甚高能(VHE)伽马射线源与脉冲星风星云有关,脉冲星风星云是TeV能量最多的银河系源类别。在X射线波段观测到的这些天体的扩展同步加速器星云是相对论风的标志,相对论风是由年轻的高能中子星产生的,与超新星爆炸喷出的物质和周围的星际气体相互作用。相对论电子或质子在脉冲星风中或在其激波边界处加速,与磁场和低能种子光子相互作用,产生观测到的VHE伽马射线发射。VERITAS阵列的四个成像大气切伦科夫望远镜的目的是研究天体物理源的伽马射线的能量域从约100 GeV高达几十TeV。VERITAS阵列的灵敏度允许从PWNe的伽马射线发射的形态和光谱特征的详细研究。在2006年期间,VERITAS观测到了三个北方天空PWNe,G75.2+0.1,G106.6+2.9和3C58。没有证据表明TeV的伽马射线发射的位置与这些PWNe的脉冲星。

英文摘要:

Many of the recently discovered galactic very high-energy (VHE) gamma-ray sources are associated with Pulsar Wind Nebulae, which is the most populous Galactic source category at TeV energies. The extended synchrotron nebulae of these objects observed in the X-ray band are a hallmark of the relativistic winds, generated by the young, energetic neutron stars, that interact with the matter ejected by the supernova explosion and the surrounding interstellar gas. Relativistic electrons, or protons, accelerated in the pulsar winds, or at their shock boundaries, interact with the magnetic field and low energy seed photons to produce the observed VHE gamma-ray emission. The VERITAS array of four imaging atmospheric Cherenkov telescopes was designed to study astrophysical sources of gamma rays in the energy domain from about 100 GeV up to several tens of TeV. The sensitivity of the VERITAS array allows detailed studies of the morphology and spectral features of gamma-ray emission from PWNe. Three northern sky PWNe, G75.2+0.1, G106.6+2.9, and 3C58, were observed with VERITAS during 2006. No evidence for TeV gamma-ray emission at the position of the pu lsar associated with these PWNe is demonstrated.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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