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arXiv 2407.01153astro-ph.GA
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SIGNALS 星系中超新星遗迹的性质——I. NGC 6822 与 M33

Properties of supernova remnants in SIGNALS galaxies -- I . NGC 6822 and M33

Salvador Duarte Puertas, Laurent Drissen, Carmelle Robert, Laurie Rousseau-Nepton, R. Pierre Martin, Philippe Amram, Thomas Martin

AI总结:

本文利用 SITELLE 光谱数据研究 NGC 6822 和 M33 中超新星遗迹的运动学性质,提出结合 [SII]/Hα 比值与速度弥散的新参数 ξ,以更有效地区分超新星遗迹与 HII 区。

摘要:

我们基于加拿大-法国-夏威夷望远镜上的 SITELLE 成像傅里叶变换光谱仪(iFTS)获得的数据,对 SIGNALS 巡天中最近星系——即 NGC 6822(一个天体)和 M33(163 个天体)——中已知超新星遗迹(SNRs)的运动学性质进行了空间分辨研究。本文的目的是为河外超新星遗迹提供更好的识别方案,特别是区分 HII 区与超新星遗迹。为此,我们使用了同时涉及 [SII]/Hα 比值和速度弥散(σ)的图。我们还引入了一个新参数 ξ = [SII]/Hα × σ,它进一步增强了超新星遗迹与其余电离气体之间的对比度。我们整个样本中超过 90% 的超新星遗迹显示出大于标准值(0.4)的积分 [SII]/Hα 比值。我们视场中 86% 的超新星遗迹表现出显著的速度弥散。我们观测的光谱分辨率使我们能够观测到一些超新星遗迹的复杂速度结构。

英文摘要:

We present a spatially resolved study of the kinematical properties of known supernova remnants (SNRs) in the nearest galaxies of the SIGNALS survey, namely NGC 6822 (one object) and M33 (163 objects), based on data obtained with the SITELLE Imaging Fourier Transform Spectrometer (iFTS) at the Canada-France-Hawaii Telescope. The purpose of this paper is to provide a better scheme of identification for extragalactic SNRs and, in particular, to distinguish between HII regions and SNRs. For that we have used diagrams which involve both the [SII]/H$α$ ratio and the velocity dispersion ($σ$). We also introduce a new parameter, $ξ= {[SII] \over Hα} \times σ$, which enhances still the contrast between SNRs and the rest of the ionised gas. More than 90\% of the SNRs in our entire sample show an integrated [SII]/H$α$ ratio larger than the canonical value (0.4). 86\% of the SNRs present in our field show a significant velocity dispersion. The spectral resolution of our observations allows us to observe the complex velocity structure of some SNRs.

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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