Astronomy:NGC 5806

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Short description: Spiral galaxy in the constellation Virgo

Coordinates: Sky map 15h 00m 00.40s, +1° 53′ 27″

NGC 5806
NGC 5806 Hubble WikiSky.jpg
NGC 5806, as observed by the Hubble Space Telescope (HST).
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension 15h 00m 00.400s[1]
Declination+01° 53′ 28.70″[1]
Redshift0.00450[2]
Helio radial velocity1346 ± 21 km/s[2]
Distance68 Mly (21 Mpc)[3]
Apparent magnitude (V)11.70[3]
Apparent magnitude (B)12.40[3]
Characteristics
TypeSAB(s)b[1][3]
Apparent size (V)3.1′ × 1.6′[3]
Other designations
UGC 9645, MCG+00-38-014, PGC 53578[2]

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]

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. ↑ 1.0 1.1 1.2 "Results for object NGC 5806 (NGC 5806)". NASA/IPAC Extragalactic Database. California Institute of Technology. https://ned.ipac.caltech.edu/byname?objname=NGC%205806&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1. Retrieved 2021-02-21. 
  2. ↑ 2.0 2.1 2.2 2.3 "NGC 5806". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+5806. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Gil de Paz, Armando et al. (December 2007). "The GALEX Ultraviolet Atlas of Nearby Galaxies". The Astrophysical Journal Supplement Series 173 (2): 185–255. doi:10.1086/516636. Bibcode: 2007ApJS..173..185G. 
  4. ↑ Seligman, Courtney. "New General Catalogue objects: NGC 5800 - 5849". http://cseligman.com/text/atlas/ngc58.htm#5806. Retrieved 2021-02-21. 
  5. ↑ Mauerhan, Jon C.; Van Dyk, Schuyler D.; Graham, Melissa L.; Zheng, Weikang; Clubb, Kelsey I.; Filippenko, Alexei V.; Valenti, Stefano; Brown, Peter et al. (2015). "SN Hunt 248: A super-Eddington outburst from a massive cool hypergiant". Monthly Notices of the Royal Astronomical Society 447 (2): 1922. doi:10.1093/mnras/stu2541. Bibcode: 2015MNRAS.447.1922M. 
  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. doi:10.1111/j.1365-2966.2009.14506.x. Bibcode: 2009MNRAS.395.1409S. 
  7. ↑ Fremling, C.; Sollerman, J.; Taddia, F.; Ergon, M.; Fraser, M.; Karamehmetoglu, E.; Valenti, S.; Jerkstrand, A. et al. (2016). "PTF12os and iPTF13bvn". Astronomy & Astrophysics 593: A68. doi:10.1051/0004-6361/201628275. 

External links



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