IPTF13bvn

NGC 5806

NGC 5806

Spiral galaxy in the constellation Virgo

NGC 5806 is an intermediate spiral galaxy in the constellation Virgo. It was discovered on February 24, 1786, by the astronomer John Herschel.[4] It is located about 70 million light-years (or about 21 Megaparsecs) away from the Milky Way.[3] It is a member of the NGC 5846 Group.[2]

Quick Facts Observation data (J2000 epoch), Constellation ...

NGC 5806 contains a star that was catalogued as a supernova (SN Hunt 248), but turned out to be a supernova imposter. The progenitor was detected as a cool hypergiant with an absolute visual magnitude of −9 and 400,000 times more luminous than the sun. The eruption saw it increase in luminosity to around 80,000,000 L☉.[5]

Supernova SN 2004dg in NGC 5806

NGC 5806 has also hosted several true supernova. SN 2004dg, around 100 times brighter than SN Hunt 248 was a typical type II supernova. The progenitor has not been detected and is expected to have been a relatively low mass, low luminosity, red supergiant.[6] PTF12os in 2012 was a type IIb supernova that occurred in 2012, and iPTF13bvn was a type Ib supernova that exploded in 2013.[7]

References

  1. [1]
    "Results for object NGC 5806 (NGC 5806)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2021-02-21.
  2. [2]
    "NGC 5806". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-21.
  3. [3]
    Gil de Paz, Armando; et al. (December 2007). "The GALEX Ultraviolet Atlas of Nearby Galaxies". The Astrophysical Journal Supplement Series. 173 (2): 185–255. arXiv:astro-ph/0606440. Bibcode:2007ApJS..173..185G. doi:10.1086/516636. S2CID 119085482.
  4. [4]
    Seligman, Courtney. "New General Catalogue objects: NGC 5800 - 5849". cseligman.com. Retrieved 2021-02-21.
  5. [5]
    Mauerhan, Jon C.; Van Dyk, Schuyler D.; Graham, Melissa L.; Zheng, Weikang; Clubb, Kelsey I.; Filippenko, Alexei V.; Valenti, Stefano; Brown, Peter; Smith, Nathan; Howell, D. Andrew; Arcavi, Iair (2015). "SN Hunt 248: A super-Eddington outburst from a massive cool hypergiant". Monthly Notices of the Royal Astronomical Society. 447 (2): 1922. arXiv:1407.4681. Bibcode:2015MNRAS.447.1922M. doi:10.1093/mnras/stu2541. S2CID 11415725.
  6. [6]
    Smartt, S. J.; Eldridge, J. J.; Crockett, R. M.; Maund, J. R. (2009). "The death of massive stars - I. Observational constraints on the progenitors of Type II-P supernovae". Monthly Notices of the Royal Astronomical Society. 395 (3): 1409. arXiv:0809.0403. Bibcode:2009MNRAS.395.1409S. doi:10.1111/j.1365-2966.2009.14506.x. S2CID 3228766.
  7. [7]
    Fremling, C.; Sollerman, J.; Taddia, F.; Ergon, M.; Fraser, M.; Karamehmetoglu, E.; Valenti, S.; Jerkstrand, A.; Arcavi, I.; Bufano, F.; Elias Rosa, N.; Filippenko, A. V.; Fox, D.; Gal-Yam, A.; Howell, D. A.; Kotak, R.; Mazzali, P.; Milisavljevic, D.; Nugent, P. E.; Nyholm, A.; Pian, E.; Smartt, S. (2016). "PTF12os and iPTF13bvn". Astronomy & Astrophysics. 593: A68. arXiv:1606.03074. doi:10.1051/0004-6361/201628275. S2CID 54028503.
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