Epoch J2000 Equinox J2000
|Right ascension||20h 23m 30.68s |
|Declination||+20° 46′ 03.8″ |
|Apparent magnitude (V)||16.86|
V339 Delphini or Nova Delphini 2013 (PNV J20233073+2046041) is a bright nova star in the constellation Delphinus. It was discovered on 14 August 2013 by amateur astronomer Koichi Itagaki in Japan and confirmed by the Liverpool Telescope on La Palma. The nova appeared with a magnitude 6.8 when it was discovered and peaked at magnitude 4.3 on 16 August 2013. A nova is produced by the fusion of accumulated material on the white dwarf nova progenitor acquired from its companion star. The nova system is thus a binary star, and a classical nova.
V339 Del is the first nova that has been observed to synthesize the element lithium. Production of lithium-7 from the decay of beryllium-7, which was observed in the wind blown out of the nova. This is the first direct evidence of the supply of lithium to the interstellar medium by an astronomical object. Lithium-7 is fragile in the environment at the center of a nova, so being blown out of the environment at the center is necessary for the observation of lithium. The beryllium was produced by the fusion of helium-3 with helium-4. Nucleosynthesis of lithium is important in the study of chemical abundances in the universe.
- "NOVA Del 2013 -- Nova". SIMBAD. Retrieved 2015-02-20.
- "Light Curve Generator: AAVSO Data for Nova DEL 2013". American Association of Variable Star Observers. 16 August 2013. Retrieved 16 August 2013.
- Bob King (14 August 2013). "Bright New Nova In Delphinus — You can See it Tonight With Binoculars". Universe Today.
- Robin Burks (27 October 2014). "Astronomers observe exploding fireball stage of nova". Tech Times.
- "Classical nova explosions are major lithium factories in the universe". Science Daily. 19 February 2015.
- Central Bureau for Astronomical Telegrams, PNV J20233073+2046041 Transient Object Followup Reports
- Akito Tajitsu; Kozo Sadakane; Hiroyuki Naito; Akir Arai; et al. (19 February 2015). "Explosive lithium production in the classical nova V339 Del (Nova Delphini 2013)". Nature (published 18 February 2015). 518: 381–384. Bibcode:2015Natur.518..381T. PMID 25693569. arXiv: . doi:10.1038/nature14161.
|Wikimedia Commons has media related to Nova Delphini 2013.|
- Sky and Telescope, Bright Nova in Delphinus
- FastSWF, Nova Delphini Evolution 2013-2014 - Animation (hgg)
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