NGC 5668
| NGC 5668 | |
|---|---|
 GALEX image of NGC 5668 | |
| Observation data | |
| Constellation | Virgo |
| Right ascension | 14h 33m 24.331s[1] |
| Declination | +04° 27′ 01.75″[1] |
| Heliocentric radial velocity | 1,582 ± 5[2] km/s |
| Distance | 80.9 ± 5.5 million light years (24.8 ± 1.7 Mpc)[2] |
| Characteristics | |
| Type | SA(s)d[2] |
| Mass | 5.7×1010[2] M☉ |
| Other designations | |
| UGC 9363[3] | |
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 650×103 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.[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
- ^ a b Skrutskie, M. F.; et al. (February 2006), "The Two Micron All Sky Survey (2MASS)", The Astronomical Journal, 131 (2): 1163–1183, Bibcode:2006AJ....131.1163S, doi:10.1086/498708.
- ^ 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.
- ^ "NGC 5668 -- Galaxy", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2013-07-11.
- ^ Buta, Ronald J.; et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN 0521820480.
- ^ a b Nakano, S.; et al. (2004), "Supernova 2004G in NGC 5668", IAU Circular, 8272: 1, Bibcode:2004IAUC.8272....1N.
- ^ Elias-Rosa, N.; et al. (2004), "Supernova 2004G in NGC 5668", IAU Circular, 8273: 2, Bibcode:2004IAUC.8273....2E.
- ^ 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.
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