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arXiv 1909.00766astro-ph.GA
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O CAESAR:河外SupernovA遗迹的光学星表

O CAESAR: The Optical CAtalogue of Extragalactic SupernovA Remnants

I. Moumen, C. Robert, D. Devost, L. Rousseau-Nepton, D. Patnaude, S. Safi-Harb, R. P. Martin, L. Drissen, T. Martin

摘要:

我们介绍O CAESAR,河外超新星遗迹的光学CAtalogue。CAESAR将提供由同一望远镜、同一仪器和在类似观测条件下拍摄的河外信噪比候选者的最大均匀光学勘测。我们的样本是体积有限的(D $\leq$ 10 Mpc),主要包括来自大型计划信号的星系($\sim$ 40)。观测是使用加拿大-法国-夏威夷望远镜的成像傅里叶变换摄谱仪SITELLE进行的。使用三个滤光片,我们能够测量强发射谱线[O II] $λ$ 3727、H $β$、[O III] $λλ$ 4959、5007、H $α$、[N II] $λλ$ 6548、6583和[S II] $λλ$ 6716、6731。SNR候选的识别将自动完成,并将基于发射线通量比[S II]/H $α$ $\ge$ 0.4的区域的四个标准。为了确认来自我们样品的候选物中电离机制的冲击加热性质,我们采用了自洽光谱分析,使用我们的SITELLE数据提供的整套发射线,并考虑Sabbadin图和BPT图。在这里,我们提出了我们的方法和螺旋星系NGC 3344的第一个结果。

英文摘要:

We present O CAESAR, the Optical CAtalogue of Extragalactic SupernovA Remnants. O CAESAR will provide the largest homogeneous optical survey of extragalactic SNR candidates taken by the same telescope, the same instrument, and under similar observational conditions. Our sample is volume-limited (D $\leq$ 10 Mpc) and includes mostly galaxies ($\sim$40) from the Large Program SIGNALS. The Observations are carried out using SITELLE, the imaging Fourier transform spectrograph of the Canada-France-Hawaii Telescope. Using three filters, we are able to measure the strong emission lines [O II]$λ$3727, H$β$, [O III]$λλ$4959,5007, H$α$, [N II]$λλ$6548,6583, and [S II]$λλ$6716,6731. Identification of the SNR candidates will be done automatically and will be based on four criteria for regions where the emission lines flux ratio [S II]/H$α$ $\ge$ 0.4. To confirm the shock-heated nature of the ionization mechanism in the candidates derived from our sample, we adopted a self-consistent spectroscopic analysis using the whole set of emission lines available with our SITELLE data and considering Sabbadin plots and BPT diagrams. We here present our method and first results for the spiral galaxy NGC 3344.

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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