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2005 supernova event in constellation Canes Venatici
SN 2005cs was a supernova in the spiral galaxy M51, known as the Whirlpool Galaxy. It was a type II-P core-collapse supernova, discovered June 28, 2005 by Wolfgang Kloehr, a German amateur astronomer. The event was positioned at an offset of 15″ west and 78″ south of the galactic nucleus of M51. Based on the data, the explosion was inferred to occur 2.8 days before discovery. It was considered under-luminous for a supernova of its type, releasing an estimated 3×10 erg in energy.
The progenitor star was identified from a Hubble Space Telescope image taken January 20–21, 2005. It was a red supergiant with a spectral type in the mid-K to late-M type range and an estimated initial (ZAMS) mass of 9+3 −2 M☉. A higher mass star enshrouded in a cocoon of dust has been ruled out.
References
^ Barbon, R.; et al. (2008). "Asiago Supernova Catalogue". CDS/ADC Collection of Electronic Catalogues. 1. Bibcode:2008yCat....1.2024B.
^ Kloehr, W.; et al. (June 2005). "Supernova 2005cs in M51". IAU Circular. 8553 (1): 1. Bibcode:2005IAUC.8553....1K.
Bishop, David (August 8, 2014). "Supernova 2005cs in M51". Rochester Academy of Science. Retrieved November 18, 2015.
Dessart, Luc; et al. (March 2008). "Using Quantitative Spectroscopic Analysis to Determine the Properties and Distances of Type II Plateau Supernovae: SN 2005cs and SN 2006bp". The Astrophysical Journal. 675 (1): 644–669. arXiv:0711.1815. Bibcode:2008ApJ...675..644D. doi:10.1086/526451. S2CID15742356.
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