Suzaku observations of the old pulsar wind nebula candidate HESS J1356-645
Suzaku observations of the old pulsar wind nebula candidate HESS J1356-645
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老脉冲星风星云候选者 HESS J1356-645 的朱雀观测
DOI：
10.1093/pasj/psv013
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发表时间：
2015
影响因子：
2.3
通讯作者：
J.S. Hiraga
中科院分区：
文献类型：
--
作者：
M. Izawa;T. Dotani;T. Fujinaga;A. Bamba;M. Ozaki;J.S. Hiraga
通过深部观测，在脉冲星PSR J1357−6429附近发现了一个很大程度上扩展的X射线发射。这颗脉冲星的特征年龄为7.3TeV Kyr，位于TeVγ-ray源Hess J1356−645内。扩展的发射被发现具有1 σX射线尺寸为∼ 4‘，或∼ 3 PC在2.4kpc，与脉冲星有小的偏移量。它的X射线光谱可以用一个简单的幂定律模型很好地再现，光子指数为。没有发现X射线光子指数随距离脉冲星的距离的显著空间变化。我们得出结论，这种扩展发射与PSR J1357−6429的脉冲星风星云(Pwn)有关。这是一个围绕中年脉冲星的大部分扩展星云的新样本。我们根据遗留的PWN场景讨论了这种PWN的演化。
A largely extended X-ray emission was discovered around the pulsar PSR J1357−6429 with the Suzaku deep observations. The pulsar, whose characteristic age is 7.3 kyr, is located within the TeV γ-ray source HESS J1356−645. The extended emission is found to have a 1 σ X-ray size of ∼ 4′, or ∼ 3 pc at 2.4 kpc, with a small offset from the pulsar. Its X-ray spectrum is well reproduced by a simple power-law model with a photon index of. No significant spatial variation was found for the X-ray photon index as a function of distance from the pulsar. We conclude that the extended emission is associated to the pulsar wind nebula (PWN) of PSR J1357−6429. This is a new sample of largely extended nebulae around middle-aged pulsars. We discuss the evolution of this PWN according to the relic PWN scenario.