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arXiv 2403.13892astro-ph.HE
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S147超新星遗迹的距离

The Distance to the S147 Supernova Remnant

C. S. Kochanek, J. C. Raymond, N. Caldwell

AI总结:

结合Gaia数据与多光纤光谱,通过搜索热星中高速吸收线,测定SNR S147的距离为1.37 kpc,与脉冲星视差距离一致且不确定性更小。

摘要:

在缺乏超新星遗迹(SNR)中脉冲星或幸存双星的视差距离时,银河系SNR的距离通常非常不确定。然而,通过结合Gaia数据与宽视场、多光纤阶梯光谱仪光谱,现在可以通过在热星中搜索作为距离函数的高速CaII或NaI吸收线的出现,来获得许多具有有限消光的SNR的准确距离。我们使用259颗明亮蓝星的光谱对SNR S147进行了演示。我们获得了1.37 kpc的中位距离(90%置信度下为1.30至1.47 kpc),这与脉冲星1.46 kpc的中位视差距离(90%置信度下为1.12至2.10 kpc)一致,但不确定性显著更小。我们的距离也与该SNR中候选未束缚双星伴星HD37424的距离一致。高速吸收线的存在与SNR的发射线通量相关,但与射电通量不相关。

英文摘要:

In the absence of a parallax distance to a pulsar or a surviving binary in a supernova remnant (SNR), distances to Galactic SNRs are generally very uncertain. However, by combining Gaia data with wide field, multi-fiber echelle spectroscopy, it is now possible to obtain accurate distances to many SNRs with limited extinction by searching for the appearance of high velocity CaII or NaI absorption lines in hot stars as a function of distance. We demonstrate this for the SNR S147 using the spectra of 259 luminous, blue stars. We obtain a median distance of 1.37 kpc (1.30 to 1.47 kpc at 90% confidence) that is consistent with the median parallax distance to the pulsar of 1.46 kpc (1.12 to 2.10 kpc at 90% confidence), but with significantly smaller uncertainties. Our distance is also consistent with the distance to the candidate unbound binary companion in this SNR, HD37424. The presence of high velocity absorption lines is correlated with the emission line flux of the SNR but not with the radio flux.

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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