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arXiv 1407.6746astro-ph.HEastro-ph.SR
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发现与超新星遗迹G127.1 + 0.5有关的预先存在的分子细丝

Discovery of a pre-existing molecular filament associated with supernova remnant G127.1+0.5

Xin Zhou, Ji Yang, Min Fang, Yang Su

摘要:

我们对超新星遗迹(SNR)G127.1 + 0.5进行了CO谱线的毫米观测。我们在4 - 13 km/s $^{-1}$发现了一个分子丝,它由两部分组成:一部分是从残余区出来的直线部分,另一部分是残余区的弯曲部分。该曲线部分与东北地区1420 MHz射电连续谱和中红外观测中的亮信噪比壳层相吻合。此外,红移线翼增宽只发现在弯曲部分的分子丝,这表明一个物理相互作用。这些首次提供了强有力的证据来证实SNR与预先存在的长分子丝之间的关联。东北部残余壳层的多波段观测可以用残余激波和致密分子丝之间的相互作用来解释。RADEX辐射转移模型的安静和冲击组件产生的物理条件一致的非解离J型冲击的通道。我们认为,灯丝的弯曲部分完全被残骸的前向激波吞没。聚集的年轻恒星天体(YSO)和邻近的分子丝之间的空间相关性接近SNR,这可能与祖星的活动。

英文摘要:

We performed millimeter observations in CO lines toward the supernova remnant (SNR) G127.1+0.5. We found a molecular filament at 4--13 km s$^{-1}$ consisting of two distinct parts: a straight part coming out of the remnant region and a curved part in the remnant region. The curved part is coincides well with the bright SNR shell detected in 1420 MHz radio continuum and mid-infrared observations in the northeastern region. In addition, redshifted line wing broadening is found only in the curved part of the molecular filament, which indicates a physical interaction. These provide strong evidences, for the first time, to confirm the association between an SNR and a pre-existing long molecular filament. Multi-band observations in the northeastern remnant shell could be explained by the interaction between the remnant shock and the dense molecular filament. RADEX radiative transfer modeling of the quiet and shocked components yield physical conditions consistent with the passage of a non-dissociative J-type shock. We argue that the curved part of the filament is fully engulfed by the remnant's forward shock. A spatial correlation between aggregated young stellar objects (YSOs) and the adjacent molecular filament close to the SNR is also found, which could be related to the progenitor's activity.

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