A very faint core-collapse supernova in M85

A. Pastorello (), M. Della Valle, S. J. Smartt (), L. Zampieri, S. Benetti, E. Cappellaro, P. A. Mazzali, F. Patat, S. Spiro (), M. Turatto and S. Valenti
Additional contact information
A. Pastorello: Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast
M. Della Valle: INAF Osservatorio Astronomico di Arcetri
S. J. Smartt: Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast
L. Zampieri: INAF Osservatorio Astronomico di Padova
S. Benetti: § Kavli Institute for Theoretical Physics, University of California Santa Barbara, California 93106, USA
E. Cappellaro: § Kavli Institute for Theoretical Physics, University of California Santa Barbara, California 93106, USA
P. A. Mazzali: Max-Planck-Institut für Astrophysik
F. Patat: European Southern Observatory
S. Spiro: Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast
M. Turatto: § Kavli Institute for Theoretical Physics, University of California Santa Barbara, California 93106, USA
S. Valenti: European Southern Observatory

Nature, 2007, vol. 449, issue 7164, E1-E2

Abstract: Abstract Arising from: S. R. Kulkarni et al. Nature 447, 458–460 (2007)10.1038/nature05822 An anomalous transient in the early Hubble-type (S0) galaxy Messier 85 (M85) in the Virgo cluster was discovered by Kulkarni et al.1 on 7 January 2006 that had very low luminosity (peak absolute R-band magnitude MR of about -12) that was constant over more than 80 days, red colour and narrow spectral lines, which seem inconsistent with those observed in any known class of transient events. Kulkarni et al.1 suggest an exotic stellar merger as the possible origin. An alternative explanation is that the transient in M85 was a type II-plateau supernova of extremely low luminosity, exploding in a lenticular galaxy with residual star-forming activity. This intriguing transient might be the faintest supernova that has ever been discovered.

Date: 2007
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DOI: 10.1038/nature06282

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