iPTF14atg

iPTF14atg
Other designations iPTF 14atg
Spectral class Ia
Date 3 May 2015
Distance 300 Mly (92 Mpc)
Host IC 831
Progenitor type White dwarf

iPTF14atg is a type-Ia supernova discovered on 3 May 2015. The supernova is located in galaxy IC 831, some 300 Mly (92 Mpc) distant.[1] The supernova is thought to have ignited on May 2 or 3.[2] The supernova's shockwave slammed into a companion star, shocking it into producing an ultraviolet pulse.[3] The companion star that was hit is suspected to be a red giant star.[4] This detection of the UV signal represents the first time the collision event of a supernova shockwave upon a companion star has been detected.[5] The supernova was discovered by the Intermediate Palomar Transient Factory (iPTF), a successor to the earlier Palomar Transient Factory, and based at the Palomar Observatory in California. The data was processed by collaborators in Europe, that lead to the supernova discovery.[3]

This single-degenerate white dwarf with normal star binary system represents one of two mechanisms for producing a type-Ia supernova, the other being double-degenerate two white dwarf binary stars.[1][5]

Further reading

  • Cao, Yi; Kulkarni, S. R; Howell, D. Andrew; Gal-Yam, Avishay; Kasliwal, Mansi M; Valenti, Stefano; Johansson, J; Amanullah, R; Goobar, A; Sollerman, J; Taddia, F; Horesh, Assaf; Sagiv, Ilan; Cenko, S. Bradley; Nugent, Peter E; Arcavi, Iair; Surace, Jason; Woźniak, P. R; Moody, Daniela I; Rebbapragada, Umaa D; Bue, Brian D; Gehrels, Neil (2015). "A strong ultraviolet pulse from a newborn type Ia supernova". Nature. 521 (7552): 328. arXiv:1505.05158. Bibcode:2015Natur.521..328C. doi:10.1038/nature14440. PMID 25993962.

References

  1. 1 2 "Supernova hits star, results shocking". SpaceDaily. 25 May 2015.
  2. ↑ "Strong UV Pulse Reveals Supernova's Origin Story". Carnegie Science. 20 May 2015.
  3. 1 2 "Supernova Collides With Its Companion Star". Science Daily. 20 May 2015.
  4. ↑ Jonathan O'Callaghan (21 May 2015). "What happens when a star EXPLODES? Supernova shockwave spotted hitting a red giant could solve cosmic mystery". Daily Mail (London).
  5. 1 2 "Caltech astronomers observe a supernova colliding with its companion star". Space Daily. 22 May 2015.


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