arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2307.03369astro-ph.HEastro-ph.GA
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热复合超新星遗迹G352.7$-$0.1的分子环境

Molecular environment of the thermal composite supernova remnant G352.7$-$0.1

Qian-Qian Zhang, Ping Zhou, Yang Chen, Xiao Zhang, Wen-Juan Zhong, Xin Zhou, Zhi-Yu Zhang, Jacco Vink

AI总结:

本研究通过APEX望远镜的CO谱线成图,揭示热复合超新星遗迹G352.7−0.1与分子云的相互作用并测定其距离,还发现疑似前身星风泡的膨胀结构,且未探测到其伽马射线对应体。

摘要:

银河系超新星遗迹(SNR)在我们理解超新星及其对星际环境的反馈作用中占据重要地位。SNR G352.7$-$0.1因其热复合形态和双环结构而具有特殊性。我们利用阿塔卡马探路者实验(Atacama Pathfinder Experiment)望远镜,对G352.7$-$0.1方向的$^{12}$CO和$^{13}$CO $J=2$-1谱线开展了光谱成图观测。在东北环的本地静止标准速度约$\boldsymbol{-50}$至$\boldsymbol{-30}$ km s$^{-1}$范围内,探测到宽化的$^{12}$CO谱线,表明该遗迹正与速度约为$-51$ km s$^{-1}$的分子云(MCs)发生相互作用。据此,我们确定该SNR的距离约为10.5 kpc。沿视线方向的受激气体动量和动能分别约为$10^2{\rm M_{sun}}$ km s$^{-1}$和$10^{46}$ erg。我们还在遗迹周围发现了一个膨胀结构,该结构可能与前身星的星风泡相关。通过分析能量范围为0.1-500 GeV的Fermi-LAT数据,我们未发现G352.7$-$0.1的伽马射线对应体。

英文摘要:

Galactic supernova remnants (SNRs) play an important role in our understanding of supernovae and their feedback on the interstellar environment. SNR G352.7$-$0.1 is special for its thermal composite morphology and double-ring structure. We have performed spectroscopic mapping in $^{12}$CO and $^{13}$CO $J=2$-1 lines toward G352.7$-$0.1 with the Atacama Pathfinder Experiment telescope. Broad $^{12}$CO lines are found in the northeastern ring at a local-standard-of-rest velocity range of $\sim-50$-$-30$ km s$^{-1}$, suggesting that the remnant is interacting with molecular clouds (MCs) at $\sim-51$ km s$^{-1}$. Thus, we adopt a distance of $\sim10.5$ kpc for this SNR. The momentum and kinetic energy of the shocked gas along the line of sight are estimated to be $\sim10^2{\rm M_{sun}}$ km s$^{-1}$ and $\sim10^{46}$ erg, respectively. We also find an expanding structure around the remnant, which is possibly related to the wind-blown bubble of the progenitor star. From the Fermi-LAT data in an energy range of 0.1-500 GeV, we find no gamma-ray counterparts of G352.7$-$0.1.

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