Survivor: Supernova 1954J

Details Survivor: Supernova 1954J Survivor: Supernova 1954J

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...206.5101v&link_type=abstract

American Astronomical Society Meeting 206, #51.01; Bulletin of the American Astronomical Society, Vol. 37, p.504

Astronomy and Astrophysics

Astronomy

Scientific paper

We confirm that the precursor of the unusual SN 1954J (also known as Variable 12) in the nearby spiral galaxy NGC 2403 survived what most resembled a super-outburst, analogous to the Great Eruption of η Carinae in 1843. The apparent survivor had changed little in brightness and color from 1996 to 2004. A spectrum obtained in 2002 at the Keck-II 10-m telescope reveals characteristics broadly similar to those of η Car. Furthermore, we have identified the actual outburst-surviving star in recent high-resolution images obtained with the Hubble Space Telescope Advanced Camera for Surveys. We reveal this ``supernova impostor'' as a highly luminous (MV0 ≈ -8.0 mag), very massive (M ini ≳ 25\ M&sun;) eruptive star, now surrounded by a dusty (AV ≈ 4 mag) nebula, similar to η Car's Homunculus.

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