Astronomy: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.[citation needed] This detection of the UV signal represents the first time the collision event of a supernova shockwave upon a companion star has been detected.[4] 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][4]
Further reading
- Cao, Yi; Kulkarni, S. R; Howell, D. Andrew; Gal-Yam, Avishay; Kasliwal, Mansi M; Valenti, Stefano; Johansson, J; Amanullah, R et al. (2015). "A strong ultraviolet pulse from a newborn type Ia supernova". Nature 521 (7552): 328–31. doi:10.1038/nature14440. PMID 25993962. Bibcode: 2015Natur.521..328C.
References
- ↑ 1.0 1.1 "Supernova hits star, results shocking". SpaceDaily. 25 May 2015. http://www.spacedaily.com/reports/Supernova_hits_star_results_shocking_999.html.
- ↑ "Strong UV Pulse Reveals Supernova's Origin Story". Carnegie Science. 20 May 2015. https://carnegiescience.edu/news/strong-uv-pulse-reveals-supernova%E2%80%99s-origin-story.
- ↑ 3.0 3.1 "Supernova Collides With Its Companion Star". Science Daily. 20 May 2015. https://www.sciencedaily.com/releases/2015/05/150520133557.htm.
- ↑ 4.0 4.1 "Caltech astronomers observe a supernova colliding with its companion star". Space Daily. 22 May 2015. http://www.spacedaily.com/reports/Caltech_astronomers_observe_a_supernova_colliding_with_its_companion_star_999.html.
External links
- Light curves on the Open Supernova Catalog
- Astronomy Now magazine, "Supernova observed colliding with its companion star", 20 May 2015
- Nature World News, "Rare Supernova Sheds Light on its Mysterious Origins", Jenna Iacurci, 21 May 2015
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