PROPERTIES OF OPTICALLY SELECTED SUPERNOVA REMNANT CANDIDATES IN M33
PROPERTIES OF OPTICALLY SELECTED SUPERNOVA REMNANT CANDIDATES IN M33
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M33 中光学选择的超新星遗迹候选体的特性
DOI：
10.1088/0004-637x/793/2/134
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. Lee
中科院分区：
文献类型：
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作者：
Jong Hwan Lee;M. Lee
覆盖强发射线的窄带图像对于探测附近星系中的超新星残骸(SNR)是有效的。使用由本地组星系调查提供的窄带图像，我们搜索了M33中的SNR。剔除增强的[S II]/Hα和连续谱减影的Hα和[S II]图像中的圆形物体，我们得到了199个来源的列表。其中，79人此前不为人知。对它们的祖细胞类型和形态类型进行了分类。大多数样本(170个天体)可能是核心塌缩超新星(SNE)的遗迹，29个是Ia型SNE的遗迹。这些天体的累积大小分布与以类似方式得出的M31残留物的大小分布相似。我们得到了一个幂函数斜率，α=2.38±0.05。因此，大多数来源被认为处于Sedov-Taylor阶段，这与先前的调查结果一致。残留物的发射线比([S II]/Hα)直方图在[S II]/Hα∼0.55和∼0.8处有两个浓度，与M31相同。有趣的是，致密中心亮天体的lx(和l20 cm)与它们的光学光度相关。有X射线发射的残留物比没有X射线发射的残留物具有更亮的光学表面亮度和更小的直径。
Narrowband images covering strong emission lines are efficient for surveying supernova remnants (SNRs) in nearby galaxies. Using the narrowband images provided by the Local Group Galaxy Survey, we searched for SNRs in M33. Culling the objects with enhanced [S ii]/Hα and round morphology in the continuum-subtracted Hα and [S ii] images, we produced a list of 199 sources. Among them, 79 are previously unknown. Their progenitor and morphology types were classified. A majority of the sample (170 objects) are likely remnants of core-collapse supernovae (SNe), and 29 are remnants of Type Ia SNe. The cumulative size distribution of these objects is found to be similar to that of the M31 remnants derived in a similar way. We obtain a power-law slope, α = 2.38 ± 0.05. Thus, a majority of the sources are considered to be in the Sedov–Taylor phase, consistent with previous findings. The histogram of the emission-line ratio ([S ii]/Hα) of the remnants has two concentrations at [S ii]/Hα ∼ 0.55 and ∼0.8, as in M31. Interestingly, LX (and L20 cm) of the compact center-bright objects are correlated with their optical luminosity. The remnants with X-ray emission have brighter optical surface brightnesses and smaller diameters than those without X-ray emission.