NGC 5668

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NGC 5668
NGC 5668 GALEX WikiSky.jpg
GALEX image of NGC 5668
Observation data
Constellation Virgo
Right ascension 14h 33m 24.331s[1]
Declination +04° 27′ 01.75″[1]
Helio radial velocity 1,582 ± 5[2] km/s
Distance 80.9 ± 5.5 Mly (24.8 ± 1.7 Mpc)[2]
Type SA(s)d[2]
Mass 5.7×1010[2] M
Other designations
UGC 9363[3]
See also: Galaxy, List of galaxies

NGC 5668 is a nearly face-on spiral galaxy located about 81[2] million light years away in the constellation Virgo. 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.[4] 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 kly (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.[5] The last, a type II supernova,[6] was initially imaged on January 19, 2004, at 43" to the west and 12".5 south of the galaxy core.[5] High velocity clouds of neutral hydrogen have been observed in NGC 5668, which may have their origin in supernova explosions and strong stellar winds.[7]

References[edit]

  1. ^ a b Skrutskie, M. F. et al. (February 2006), The Two Micron All Sky Survey (2MASS), Astrophysical Journal 131 (2): 1163–1183, Bibcode:2006AJ....131.1163S, doi:10.1086/498708. 
  2. ^ a b c d e f g 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, arXiv:1205.5051, Bibcode:2012ApJ...754...61M, doi:10.1088/0004-637X/754/1/61. 
  3. ^ NGC 5668 -- Galaxy, SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2013-07-11. 
  4. ^ Buta, Ronald J. et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN 0521820480. 
  5. ^ a b Nakano, S. et al. (2004), Supernova 2004G in NGC 5668, IAU Circular 8272: 1, Bibcode:2004IAUC.8272....1N. 
  6. ^ Elias-Rosa, N. et al. (2004), Supernova 2004G in NGC 5668, IAU Circular 8273: 2, Bibcode:2004IAUC.8273....2E. 
  7. ^ 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, arXiv:astro-ph/0004295, Bibcode:2000A&A...358..812J. 

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