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NGC 5806

Coordinates: Sky map 15h 00m 00.4123s, +1° 53′ 28.756″
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NGC 5806
NGC 5806 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension15h 00m 00.4123s[1]
Declination+01° 53′ 28.756″[1]
Redshift0.004493[1]
Heliocentric radial velocity1346 ± 21 km/s[2]
Distance68 Mly (21 Mpc)[3]
Group or clusterNGC 5806 Group (LGG 392)[4]
Apparent magnitude (V)11.70[3]
Apparent magnitude (B)12.40[3]
Characteristics
TypeSAB(s)b[1][3]
Size~73,900 ly (22.65 kpc) (estimated)[1]
Apparent size (V)3.1′ × 1.6′[3]
Other designations
IRAS 14574+0205, UGC 9645, MCG +00-38-014, PGC 53578, CGCG 020-041[2][1]

NGC 5806 is an intermediate spiral galaxy in the constellation Virgo. It was discovered by German-British astronomer William Herschel on 24 February 1786.[5] It is located about 70 million light-years (21 Megaparsecs) away from the Milky Way.[3] It is a member of the NGC 5846 Group.[2]

Supernovae and Imposter

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Supernova SN 2004dg in NGC 5806

Three supernovae and one supernova imposter have been observed in NGC 5806:

  • SN 2004dg (type II, mag. 17.1) was discovered by Associazione Ternana Astrofili on 19 July 2004.[6][7] The progenitor of SN 2004dg has not been detected and is expected to have been a relatively low mass, low luminosity, red supergiant.[8]
  • SN 2012P (type IIb, mag. 15.0) was discovered by Fabio Briganti on 22 January 2012.[9][10] Originally classified as a type Ib/c, it was later determined to be type IIb.[11] Later analysis concluded that the progenitor had an initial mass of 15.2 M☉.[12]
  • iPTF13bvn (type Ib, mag. 17.2) was discovered by Palomar Transient Factory on 16 June 2013.[13][14]
  • SN Hunt 248 was discovered by the Catalina Real-time Transient Survey and Stan Howerton on 21 May 2014. It was initially catalogued as a supernova, 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☉.[15]

References

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  1. ^ a b c d e f "Results for object NGC 5806". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2021-02-21.
  2. ^ a b c "NGC 5806". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-21.
  3. ^ a b c d e f 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. ^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
  5. ^ Seligman, Courtney. "New General Catalogue objects: NGC 5800 - 5849". cseligman.com. Retrieved 2021-02-21.
  6. ^ Vagnozzi, A.; De Pasquale, D.; Guerri, F.; Guerri, G.; Cristofanelli, M.; Romanelli, S.; Valentini, S.; Yamaoka, H.; Itagaki, K. (July 2004). "Supernova 2004dg". International Astronomical Union Circular (8375). International Astronomical Union. Bibcode:2004IAUC.8375....1V.
  7. ^ "SN 2004dg". Transient Name Server. IAU. Retrieved 22 August 2024.
  8. ^ 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.
  9. ^ Dimai, A.; Briganti, F.; Brimacombe, J. (2012). "Supernova 2012P in NGC 5806 = PSN J14595904+0153251". Central Bureau Electronic Telegrams (2993): 1. Bibcode:2012CBET.2993....1D.
  10. ^ "SN 2012P". Transient Name Server. IAU. Retrieved 22 August 2024.
  11. ^ Arcavi, Iair; Gal-Yam, Avishay; Ben-Ami, Sagi; Fox, Derek; Kasliwal, Mansi; Nugent, Peter; Howell, D. Andrew; Parrent, Jerod; Horesh, Assaf; Bellm, Eric; PTF Collaboration (2012). "PTF12os / PSN J14595904+0153251 is a Type IIb Supernova". The Astronomer's Telegram. 3881: 1. Bibcode:2012ATel.3881....1A.
  12. ^ Sun, Ning-Chen; Maund, Justyn R.; Crowther, Paul A.; Fang, Xuan; Zapartas, Emmanouil (2021). "Towards a better understanding of supernova environments: A study of SNe 2004dg and 2012P in NGC 5806 with HST and MUSE". Monthly Notices of the Royal Astronomical Society. 504 (2): 2253. arXiv:2011.13667. Bibcode:2021MNRAS.504.2253S. doi:10.1093/mnras/stab994.
  13. ^ Cao, Y.; Gorbikov, E.; Arcavi, I.; Ofek, E.; Gal-Yam, A.; Nugent, P.; Kasliwal, M. (2013). "IPTF discovery of a young SN candidate at z=0.00449". The Astronomer's Telegram. 5137: 1. Bibcode:2013ATel.5137....1C.
  14. ^ 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.
  15. ^ 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.
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