Optical Imaging of Nova Shells and the Maximum Magnitude-Rate of Decline Relationship
Optical Imaging of Nova Shells and the Maximum Magnitude-Rate of Decline Relationship
复制标题
新星炮弹的光学成像和最大幅度-下降率关系
DOI：
10.1086/301551
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
H. Duerbeck
中科院分区：
文献类型：
--
作者：
R. Downes;H. Duerbeck
利用地面和空间观测对最近的30颗新星进行了光学成像研究。在地面数据中，已经在9个物体周围检测到了已解析的外壳，而另外4个物体的外壳被哈勃太空望远镜观测到;对于RW UMi，我们未能检测到5年前观察到的外壳。图中显示了Hα的图像，适当的话还显示了[O III] λ5007的图像，如果没有已发表的图，则给出了没有壳层的新星的发现图。导出了所有带壳系统的膨胀函数，给出了28个天体的绝对星等，沿着讨论了最大星等与衰减率的关系。我们发现，单独的线性拟合的快速和缓慢的新星可能是一个更好的代表性的数据比一个单一的，全球性的配合。在最低限度，大多数新星有类似的大小，在最大的矮新星和新星样的恒星。
An optical imaging study of 30 recent novae has been undertaken using both ground-based and space-based observations. Resolved shells have been detected around nine objects in the ground-based data, while another four objects have shells detected by Hubble Space Telescope observations; for RW UMi, we fail to detect a shell that was observed 5 years earlier. Images in Hα, and when appropriate [O III] λ5007, are shown, and finding charts for novae without shells are given if no published chart is available. Expansion parallaxes for all systems with shells are derived, and absolute magnitudes for a total of 28 objects are presented, along with a discussion of the maximum magnitude–rate of decline relation. We find that separate linear fits for fast and slow novae may be a better representation of the data than a single, global fit. At minimum, most novae have similar magnitudes as those of dwarf novae at maximum and nova-like stars.