论文标题
Muse观察到的M83中的超新星残留物
Supernova Remnants in M83 as Observed with MUSE
论文作者
论文摘要
在这里，我们描述了一项针对附近螺旋星系M83的SNR和SNR候选者的新研究，这主要基于Muse Integral Field Spectroscopicy。我们在M83中修订的SNR候选人目录具有366个对象，其中81个是首次报告。其中，缪斯观察区域内的229个，其中160个具有[SII]的光谱：HALPHA比率超过0.4，该值通常被认为是确认发射星云被冲击加热的确认。结合缪斯（SII）高的缪斯区域外的51个SNR候选者：HALPHA比率，在M83中有211个光谱镜确认的SNR，这是任何外部星系中确认的SNR数量最多的。缪斯将相对较高的光谱分辨率和广泛的波长覆盖范围结合在一起，使我们能够探索SNR的另外两个属性，这些属性可以作为未来SNR搜索的基础。具体而言，基于[SII]：HALPHA比率鉴定为SNR的大多数对象显示出比HII区域的[SIII]发射的速度宽扩大和较低的比率。除了先前确定的B12-174A外，还没有发现年轻，迅速扩大的残留物预期的较广泛的排放线的搜索星云。 M83中鉴定的SNR是中年ISM主导的SNR。较小的直径候选物显示出比较大的直径物体更大的速度扩展和更大的气体密度范围，如果SNR膨胀成密度较高的气体，然后在直径较小的情况下从视图中逐渐褪色，而不是扩展到更脆的ISM，则逐渐褪色。
Here we describe a new study of the SNRs and SNR candidates in nearby face-on spiral galaxy M83, based primarily on MUSE integral field spectroscopy. Our revised catalog of SNR candidates in M83 has 366 objects, 81 of which are reported here for the first time. Of these, 229 lie within the MUSE observation region, 160 of which have spectra with [SII]:Halpha ratios exceeding 0.4, the value generally accepted as confirmation that an emission nebula is shock-heated. Combined with 51 SNR candidates outside the MUSE region with high [SII]:Halpha ratios, there are 211 spectroscopically-confirmed SNRs in M83, the largest number of confirmed SNRs in any external galaxy. MUSE's combination of relatively high spectral resolution and broad wavelength coverage has allowed us to explore two other properties of SNRs that could serve as the basis of future SNR searches. Specifically, most of the objects identified as SNRs on the basis of [SII]:Halpha ratios exhibit more velocity broadening and lower ratios of [SIII]:[SII] emission than HII regions. A search for nebulae with the very broad emission lines expected from young, rapidly expanding remnants revealed none, except for the previously identified B12-174a. The SNRs identified in M83 are, with few exceptions, middle-aged ISM-dominated ones. Smaller diameter candidates show a larger range of velocity broadening and a larger range of gas densities than the larger diameter objects, as expected if the SNRs expanding into denser gas brighten and then fade from view at smaller diameters than those expanding into a more tenuous ISM
