Astronomy:NGC 5668

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Short description: Galaxy in the constellation Virgo
NGC 5668
NGC 5668 GALEX WikiSky.jpg
GALEX image of NGC 5668
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension 14h 33m 24.331s[1]
Declination+04° 27′ 01.75″[1]
Helio radial velocity1,582 ± 5[2] km/s
Distance80.9 ± 5.5 million light years (24.8 ± 1.7 Mpc)[2]
Characteristics
TypeSA(s)d[2]
Mass5.7×1010[2] M
Other designations
UGC 9363[3]

NGC 5668 is a nearly face-on spiral galaxy, visual magnitude about 11.5,[4] located about 81[2] million light years away in the constellation Virgo. It was discovered in 1786 by William Herschel.[4] It is a member of the NGC 5638 Group of galaxies, itself one of the Virgo III Groups strung out to the east of the Virgo Supercluster of galaxies.[5]

As seen from the Earth, it is inclined by an angle of 18° to the line of sight along a position angle of 145°. The morphological classification in the De Vaucouleurs system is SA(s)d,[2] indicating a pure spiral structure with loosely wound arms.[6] However, optical images of the galaxy indicate the presence of a weak bar structure spanning an angle of 12″ across the nucleus. There is a dwarf galaxy located around 650×10^3 ly (200 kpc) to the southeast of NGC 5668, and the two may be gravitationally interacting.[2]

Three supernovae have been observed in this galaxy: SN 1952G, SN 1954B, and SN 2004G.[7] The last, a type II supernova,[8] was initially imaged on January 19, 2004, at 43" to the west and 12".5 south of the galaxy core.[7] High velocity clouds of neutral hydrogen have been observed in NGC 5668, which may have their origin in supernova explosions and strong stellar winds.[9]

Gallery

References

  1. 1.0 1.1 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W. et al. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal 131 (2): 1163–1183. doi:10.1086/498708. ISSN 0004-6256. Bibcode2006AJ....131.1163S. 
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 R. A., Marino et al. (July 2012), "Integral Field Spectroscopy and Multi-wavelength Imaging of the nearby Spiral Galaxy NGC 5668: An Unusual Flattening in Metallicity Gradient", The Astrophysical Journal 754 (1): 61, doi:10.1088/0004-637X/754/1/61, Bibcode2012ApJ...754...61M. 
  3. "NGC 5668 -- Galaxy", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%402272923, retrieved 2013-07-11. 
  4. 4.0 4.1 "New General Catalog Objects: NGC 5650 - 5699". https://cseligman.com/text/atlas/ngc56a.htm#5668. 
  5. "The Virgo III Groups". Atlas of the Universe. http://www.atlasoftheuniverse.com/galgrps/viriii.html. 
  6. Buta, Ronald J. et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN 978-0521820486, https://books.google.com/books?id=g-P7dCbB5MEC&pg=PA16. 
  7. 7.0 7.1 Nakano, S. et al. (2004), "Supernova 2004G in NGC 5668", IAU Circular 8272: 1, Bibcode2004IAUC.8272....1N. 
  8. Elias-Rosa, N. et al. (2004), "Supernova 2004G in NGC 5668", IAU Circular 8273: 2, Bibcode2004IAUC.8273....2E. 
  9. Jiménez-Vicente, J.; Battaner, E. (June 2000), "Vertical motions in the disk of NGC 5668 as seen with optical Fabry-Perot spectroscopy", Astronomy and Astrophysics 358: 812–818, Bibcode2000A&A...358..812J. 

External links

Coordinates: Sky map 14h 33m 24.331s, +04° 27′ 01.75″