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Supernova 1954J (Variable 12) in NGC 2403 Unmasked | S.D. Van Dyk
; A.V. Filippenko
; R. Chornock
; W. Li
; P. Challis
; | Date: |
15 Mar 2005 | Subject: | astro-ph | Affiliation: | Spitzer Science Center/Caltech), A.V. Filippenko, R. Chornock, W. Li (UC Berkeley), and P. Challis (CfA | Abstract: | 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 super-outburst, 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 eight 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^0 ~ -8.0 mag), very massive (M_initial >~ 25 Msun) eruptive star, now surrounded by a dusty (A_V ~ 4 mag) nebula, similar to eta Car’s famous Homunculus. | Source: | arXiv, astro-ph/0503324 | Services: | Forum | Review | PDF | Favorites |
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