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arXiv 2405.03324astro-ph.HEastro-ph.GA
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利用射电巡天研究银经26.6° < l < 30.6°、银纬|b| ≤ 1.25°范围内的银河系超新星遗迹及其环境

Investigation of Galactic supernova remnants and their environment in 26.6° < l < 30.6°, $\vert b \vert \leq$ 1.25° using radio surveys

Tian-Xian Luo, Ping Zhou, Hao-Ning He

AI总结:

本文利用GLEAM和THOR+VGPS多波段射电数据构建谱指数图,在银心方向确认了四个超新星遗迹候选体,并发现分子超级气泡和Hα纤维结构,提出缺失问题与观测限制、低密度环境及超新星爆发性质差异有关。

摘要:

银河系超新星遗迹(SNRs)缺失问题指的是目前已知的银河系SNRs与理论预测相比明显不完整。为扩大银河系SNRs样本,我们利用GLEAM和THOR+VGPS数据,在118至1420 MHz的四个波段上生成了一幅覆盖26.6° < l < 30.6°、|b| ≤ 1.25°区域的谱指数图,该区域近期发现了大量SNR候选体。通过使用该天区的谱指数图并对单个源的谱指数进行详细分析,我们确认了四个SNR候选体,即G26.75+0.73、G27.06+0.04、G28.36+0.21和G28.78−0.44,为超新星遗迹。此外,我们在该区域发现了一个膨胀的分子超级气泡,讨论了与SNR候选体成协的脉冲星,并发现了一条与候选体G29.38+0.10在空间上重叠的长Hα纤维结构。我们认为,银河系超新星遗迹缺失问题不仅源于观测限制,还可能与部分SNRs所处的低密度环境以及不同的超新星爆发性质有关。

英文摘要:

The problem of missing Galactic supernova remnants (SNRs) refers to the issue that the currently known Galactic SNRs are significantly incomplete compared to the theoretical prediction. To expand the sample of Galactic SNRs, we use GLEAM and THOR+VGPS data across four wavebands ranging from 118 to 1420 MHz to drive a spectral index map covering the region within 26.6° < l < 30.6°, $\vert b \vert \leq$ 1.25°, where numerous SNR candidates were recently found. By using the spectral index map of the sky region and detailed analysis of the spectral indices of individual sources, we confirmed four SNR candidates, namely G26.75+0.73, G27.06+0.04, G28.36+0.21, and G28.78$-$0.44, as SNRs. Additionally, we discovered an expanding molecular superbubble located in this region, discussed pulsars associated with SNR candidates, and discovered a long H$α$ filament that spatially overlaps with the candidate G29.38+0.10. We suggest that the problem of missing Galactic SNRs not only arises from observation limitations, but also could be due to the low-density environments of some SNRs, and the different SN explosion properties.

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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