Supernova 1954J (Variable 12) in NGC 2403 unmasked

被引：31
作者：
Van Dyk, SD
Filippenko, AV
Chornock, R
Li, WD
Challis, PM
机构：
[1] CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA
[2] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
[3] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 2005年 / 117卷 / 832期
关键词：
D O I：
10.1086/430238
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have confirmed that the precursor star of the unusual supernova 1954J ( also known as Variable 12) in NGC 2403 survived what appears to have been a superoutburst, similar to the 1843 Great Eruption of eta Carinae in the Galaxy. The apparent survivor has changed little in brightness and color over the last 8 years, and a Keck spectrum reveals characteristics broadly similar to those of eta Car. This is further suggested by our identification of the actual outburst-surviving star in high-resolution images obtained with the Advanced Camera for Surveys on the Hubble Space Telescope. We reveal this "supernova impostor" as a highly luminous (M-V(o) approximate to -8.0 mag), very massive (M-initial greater than or similar to 25 M-.) eruptive star, now surrounded by a dusty` (A(V) approximate to mag) nebula, similar to eta Car's famous Homunculus.
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页码：553 / 562
页数：10
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