Discovery of a Pulsar Wind Nebula Candidate in the Cygnus Loop
Discovery of a Pulsar Wind Nebula Candidate in the Cygnus Loop
复制标题
在天鹅座环中发现脉冲星风星云候选者
DOI：
10.1088/2041-8205/754/1/l7
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
T.
中科院分区：
文献类型：
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作者：
Katsuda;S.;Tsunemi;H.;Mori;K.;Uchida;H.;Petre;R.;Yamada;S.;and Tamagawa;T.
根据Suzaku和XMM-牛顿的观测，我们在天鹅座环超新星遗迹的南部喷发区发现了一个扩散星云，其中包含一个点状来源。星云和点源的X射线能谱符合吸收的幂定律模型，其光子指数分别为2.2±0.1和1.6±0.2。根据F星云的光子指数和F星云/F点状∼4的流量比，我们推测该系统是一个脉冲星风星云，尽管目前还没有观测到脉动星云。如果我们将其起源归因于天鹅座环状超新星，则该星云的0.5keV-8keV光度为2.1×1031(d/540pC)2erg S−1，其中d是到天鹅座环状超新星的距离。这意味着自旋减速能量损失。
We report on a discovery of a diffuse nebula containing a pointlike source in the southern blowout region of the Cygnus Loop supernova remnant, based on Suzaku and XMM-Newton observations. The X-ray spectra from the nebula and the pointlike source are well represented by an absorbed power-law model with photon indices of 2.2±0.1 and 1.6±0.2, respectively. The photon indices as well as the flux ratio of F nebula/F pointlike∼ 4 lead us to propose that the system is a pulsar wind nebula, although pulsations have not yet been detected. If we attribute its origin to the Cygnus Loop supernova, then the 0.5–8 keV luminosity of the nebula is computed to be 2.1× 10 31(d/540 pc) 2 erg s− 1, where d is the distance to the Loop. This implies a spin-down loss-energy