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NGC 5806 Contents Supernova imposter Supernovae References External links Navigation menu15h 00m 00.40s, +1° 53′ 27″"NGC 5806""Galaxy NGC 5806"1407.46812015MNRAS.447.1922M10.1093/mnras/stu25410809.04032009MNRAS.395.1409S10.1111/j.1365-2966.2009.14506.x10.1051/0004-6361/201628275An LBV masquerading as a cool hypergiantESA/Hubble Picture of the Week showing SN 2004dg

Barred spiral galaxiesSupernovaeVirgo (constellation)NGC objects


barred spiral galaxyconstellationVirgosupernovasupernova impostertype II supernovared supergiant












NGC 5806




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Coordinates: Sky map15h 00m 00.40s, +1° 53′ 27″

















NGC 5806

NGC 5806 Hubble WikiSky.jpg
NGC 5806, as observed by the Hubble Space Telescope (HST).
Credit: HST/NASA/ESA.

Observation data (J2000 epoch)
Constellation
Virgo[1]
Right ascension 15h 00m 00.40s[2]
Declination+1° 53′ 27″[1]
Redshift0.004533[1]
Distance69.76 million lightyears[1]

Apparent magnitude (V)
11.7[1]
Characteristics
TypeSBb
See also: Galaxy, List of galaxies

NGC 5806 is a barred spiral galaxy in the constellation Virgo.[2][1]




Contents





  • 1 Supernova imposter


  • 2 Supernovae


  • 3 References


  • 4 External links




Supernova imposter


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☉.[3]



Supernovae




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.[4] PTF12os in 2012 was a type IIb supernova that occurred in 2012, and iPTF13bvn was a type Ib supernova that exploded in 2013.[5]




References




  1. ^ abcdef "NGC 5806". Retrieved December 8, 2011..mw-parser-output cite.citationfont-style:inherit.mw-parser-output .citation qquotes:"""""""'""'".mw-parser-output .citation .cs1-lock-free abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .citation .cs1-lock-subscription abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registrationcolor:#555.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration spanborder-bottom:1px dotted;cursor:help.mw-parser-output .cs1-ws-icon abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center.mw-parser-output code.cs1-codecolor:inherit;background:inherit;border:inherit;padding:inherit.mw-parser-output .cs1-hidden-errordisplay:none;font-size:100%.mw-parser-output .cs1-visible-errorfont-size:100%.mw-parser-output .cs1-maintdisplay:none;color:#33aa33;margin-left:0.3em.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-formatfont-size:95%.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-leftpadding-left:0.2em.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-rightpadding-right:0.2em


  2. ^ ab "Galaxy NGC 5806". Retrieved December 8, 2011.


  3. ^ 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.


  4. ^ 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.


  5. ^ 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. doi:10.1051/0004-6361/201628275.




External links


  • An LBV masquerading as a cool hypergiant

  • ESA/Hubble Picture of the Week showing SN 2004dg






Retrieved from "https://en.wikipedia.org/w/index.php?title=NGC_5806&oldid=895032157"










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