Deep Imaging of the Site of SN 1961V, a Possible Extragalactic Eta Carinae Analogue

Details Deep Imaging of the Site of SN 1961V, a Possible Extragalactic Eta Carinae Analogue Deep Imaging of the Site of SN 1961V, a Possible Extragalactic Eta Carinae Analogue

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.2590f&link_type=abstract

HST Proposal ID #2590

Physics

Hst Proposal Id #2590

Scientific paper

Analysis of new and old ground-based observations leads us to hypothesize that the unique "Type V Supernova" 1961V in NGC1058 was not a SN (the explosion of a massive star at the end of its life). Rather, it was the super-outburst of a luminous blue variable --- an exaggerated eta Car-type outburst of a very massive, evolved star near the end of core hydrogen burning. The long plateau in the light curve following outburst, at nearly the same brightness as the pre-outburst star, suggests that the progenitor survived the outburst; it later faded only because of the formation of optically thick dust in the ejecta. The underlying star should be a hot Of/WN star. Our observations suggest a circumstellar extinction of Av=5mag, if the surviving star resembles eta Car. The present brightness of the star should be near V=27, but perhaps as bright as V=23. We will determine whether the star is present by imaging the site of SN1961V with the WFC. The faint star cannot be seen from the ground because of contamination by the underlying HII regions.

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