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arXiv 1709.01065astro-ph.GAastro-ph.SR
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绘制超新星遗迹S147 -S147尘埃云的三维尘埃消光图

Mapping the three-dimensional dust extinction toward the supernova remnant S147 - the S147 dust cloud

B. -Q. Chen, X. -W. Liu, J. -J. Ren, H. -B. Yuan, Y. Huang, B. Yu, M. -S. Xiang, C. Wang, Z. -J. Tian, H. -W. Zhang

摘要:

利用XSTPS-GAC、2 MASS和WISE的多波段光度测量数据,对超新星遗迹S147(G180.0-1.7)附近区域进行了三维消光分析。我们分离出一个以前未被识别的尘埃结构,可能与SNR S147有关。我们称之为“S147尘埃云”的结构,估计其距离为$d$ = 1.22 $\pm$ 0.21 kpc,这与S147与脉冲星PSR J 0538 + 2817相关的推测一致。该云包括几个密度相对较高的消光团块,位于S147的射电壳层上,在空间上与CO和伽马射线发射特征相吻合。我们的结论是,使用CO测量跟踪的SNR相关的MCs的探测阈值,灰尘耗尽,在外银河系的距离估计的难度是不可避免的限制。3D尘埃消光图可以提供一个更好的方式来识别和研究SNR-MC相互作用。

英文摘要:

We present a three dimensional (3D) extinction analysis in the region toward the supernova remnant (SNR) S147 (G180.0-1.7) using multi-band photometric data from the Xuyi Schmidt Telescope Photometric Survey of the Galactic Anticentre (XSTPS-GAC), 2MASS and WISE. We isolate a previously unrecognised dust structure likely to be associated with SNR S147. The structure, which we term as "S147 dust cloud", is estimated to have a distance $d$ = 1.22 $\pm$ 0.21 kpc, consistent with the conjecture that S147 is associated with pulsar PSR J0538 + 2817. The cloud includes several dense clumps of relatively high extinction that locate on the radio shell of S147 and coincide spatially with the CO and gamma-ray emission features. We conclude that the usage of CO measurements to trace the SNR associated MCs is unavoidably limited by the detection threshold, dust depletion, and the difficulty of distance estimates in the outer Galaxy. 3D dust extinction mapping may provide a better way to identify and study SNR-MC interactions.

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