Astronomy:NGC 5668
| NGC 5668 | |
|---|---|
 GALEX image of NGC 5668 | |
| Observation data (J2000 epoch) | |
| 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 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, 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 650×103 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.[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
NGC 5668 (SDSS DR14)
References
- ↑ 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. Bibcode: 2006AJ....131.1163S.
- ↑ 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, Bibcode: 2012ApJ...754...61M.
- ↑ "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.
- ↑ 4.0 4.1 "New General Catalog Objects: NGC 5650 - 5699". https://cseligman.com/text/atlas/ngc56a.htm#5668.
- ↑ "The Virgo III Groups". Atlas of the Universe. http://www.atlasoftheuniverse.com/galgrps/viriii.html.
- ↑ 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.
- ↑ 7.0 7.1 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, Bibcode: 2000A&A...358..812J.
External links
Coordinates: 
14h 33m 24.331s, +04° 27′ 01.75″
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