Minnesota Institute for Astrophysics, University of Minnesota, Minneapolis, Minnesota 55455, USA.
Nature. 2012 Jun 20;486(7403):E1; discussion E1-2. doi: 10.1038/nature11166.
Arising from A. Rest et al. 482, 375-378 (2012).During the years 1838-1858, the very massive star η Carinae became the prototype supernova impostor: it released nearly as much light as a supernova explosion and shed an impressive amount of mass, but survived as a star. In the standard interpretation, mass was driven outward by excess radiation pressure, persisting for several years. From a light-echo spectrum of that event, Rest et al. conclude that "other physical mechanisms" are required to explain it, because the gas outflow appears cooler than theoretical expectations. Here we note that (1) theory predicted a substantially lower temperature than they quoted, and (2) their inferred observational value is quite uncertain. Therefore, analyses so far do not reveal any significant contradiction between the observed spectrum and most previous discussions of the Great Eruption and its physics.
源自 A. Rest 等人的研究，482, 375-378 (2012)。在 1838 年至 1858 年间，非常大质量的 η Carinae 星成为原型超新星冒名顶替者：它释放的光几乎与超新星爆炸一样多，并损失了大量质量，但仍作为一颗恒星幸存下来。在标准解释中，质量被过量的辐射压力驱动向外，持续了数年。Rest 等人从该事件的光回光谱推断出，需要“其他物理机制”来解释它，因为气体外流的温度比理论预期的要低。在这里，我们注意到：(1) 理论预测的温度要比他们引用的温度低得多；(2) 他们推断的观测值相当不确定。因此，到目前为止的分析并没有显示观测到的光谱与之前对大爆发及其物理学的讨论之间存在任何重大矛盾。
