KPD 1930+2752

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KPD 1930+2752
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cygnus
Right ascension 19h 32m 14.81s[1]
Declination +27° 58′ 35.5″[1]
Apparent magnitude (V) 13.82[1]
Spectral type sdB+D?
Other designations
2214 Cyg, 2MASS J19321480+2758354
Database references
SIMBAD data

KPD 1930+2752 is a binary star system including a Subdwarf B star and a probable white dwarf with relatively high mass.[2] Due to the nature of this astronomical system, it seems like a likely candidate for a potential type Ia supernova, a type of supernova which occurs when a white dwarf star takes on enough matter to approach the Chandrasekhar limit, the point at which electron degeneracy pressure would not be enough to support its mass. However, carbon fusion would occur before this limit was reached, releasing enough energy to overcome the force of gravity holding the star together and resulting in a supernova.

The total mass of the binary star system likely exceeds the Chandrasekhar limit, making this system one of the most likely candidates known to serve as a progenitor for a future type Ia supernova.

See also[edit]

IK Pegasi, the nearest supernova progenitor candidate

References[edit]

  1. ^ a b c "KPD 1930+2752". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 November 2016. 
  2. ^ "The hot subdwarf B + white dwarf binary KPD 1930+2752. A supernova type Ia progenitor candidate". Astronomy and Astrophysics. 464: 299–307. 2007. arXiv:astro-ph/0609742Freely accessible. Bibcode:2006astro.ph..9742G. doi:10.1051/0004-6361:20066098.