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arXiv 1712.04423astro-ph.GA
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超新星遗迹G $20.4+0.1$、G $24.7-0.6$和G $28.6-0.1$的距离和新的分子云星协

Distances to Supernova Remnants G$20.4+0.1$, G$24.7-0.6$ and G$28.6-0.1$ and New Molecular Cloud Associations

S. Ranasinghe, D. A. Leahy

摘要:

超新星遗迹(SNRs)的精确距离对于确定它们的大小、年龄、光度和演化状态至关重要。为了确定距离,我们选择了三个SNR从VLA银河平面调查(VGPS)提取HI吸收光谱。分析HI吸收光谱、$^{13}$ CO发射光谱以及HI和$^{13}$ CO通道图,计算三种SNR的运动速度(或其极限)。这三个SNR可能与分子云有关,与$20.4+0.1$、$24.7-0.6$和$28.6-0.1$的新距离分别为$7.8 \pm0.5$ kpc、$3.8\pm 0.2 $ kpc和$ 9.6 \pm 0.3 $ kpc。

英文摘要:

Accurate distances to supernova remnants (SNRs) are crucial in determining their size, age, luminosity and evolutionary state. To determine distances, we chose three SNRs from the VLA Galactic Plane Survey (VGPS) for extraction of HI absorption spectra. Analysing HI absorption spectra, $^{13}$CO emission spectra, and HI and $^{13}$CO channel maps, kinematic velocities (or their limits) to the three SNRs were calculated. The three SNRs are probably associated with molecular clouds and the new distance to G$20.4+0.1$, G$24.7-0.6$ and G$28.6-0.1$ are $7.8 \pm0.5$ kpc, $3.8\pm 0.2 $ kpc and $ 9.6 \pm 0.3 $ kpc, respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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