论文标题
脉冲星风星云HESS J1356-645的GEV伽马射线排放与费米式
GeV gamma-ray emission from pulsar wind nebula HESS J1356-645 with Fermi-LAT
论文作者
论文摘要
HESS J1356-645被认为是与Pulsar PSR J1357-6429相关的脉冲星云（PWN）。我们在HESS J1356-645的方向上重新分析了GEV伽马射线的排放，并具有超过13年的费米大面积望远镜（LAT）数据。发现高于5 GEV的扩展伽马射线发射与Hess J1356-645在空间上是一致的。 1 GEV-1 TEV的能量范围的频谱可以用$γ= 1.51 \ pm0.10 $的索引来描述。 HESS J1356-645的宽带光谱可以通过具有破碎的幂律电子频谱的松性模型来重现。此外，我们发现证据表明，赫斯J1356-645的GEV发射的形态随着能量而变化，这种行为与PWN Vela-X相似。更多的宽带观察将有助于研究HESS J1356-645的能量依赖性特征。
HESS J1356-645 is considered to be a pulsar wind nebula (PWN) associated with the pulsar PSR J1357-6429. We reanalyze the GeV gamma-ray emission in the direction of HESS J1356-645 with more than 13 years of Fermi Large Area Telescope (LAT) data. The extended gamma-ray emission above 5 GeV is found to be spatially coincident with HESS J1356-645. The spectrum in the energy range of 1 GeV-1 TeV can be described by a power law with an index of $Γ=1.51\pm0.10$. The broadband spectrum of HESS J1356-645 can be reproduced by a leptonic model with a broken power-law electronic spectrum. In addition, we found evidence that the morphology of the GeV emission from HESS J1356-645 varies with energy, a behavior which is similar to that of the PWN Vela-X. More broadband observations will be helpful to study the energy-dependent characteristics of HESS J1356-645.
