NGC 972
| NGC972 | |
|---|---|
 NGC 972 taken byHubble Space Telescope.[1] | |
| Observation data (J2000[2]epoch) | |
| Constellation | Aries |
| Right ascension | 02h34m13.385s[3] |
| Declination | +29° 18′ 40.47″[3] |
| Redshift | 0.005147[2] |
| Heliocentric radial velocity | 1,541 km/s[4] |
| Distance | 49.8Mly(15.28Mpc)[4] |
| Apparent magnitude(B) | 12.1[2] |
| Characteristics | |
| Type | Sb or Sd[5] |
| Mass | 1.2×1010M☉[5]M☉ |
| Apparent size(V) | 10 arcmin[6] |
| Other designations | |
| LEDA 9788,MCG+05-07-010,UGC2045[2] | |
NGC 972is a dusty[5]spiral galaxyin the northernconstellationofAries,located at an approximate distance of 49.8Mly[4]from theMilky Way.It was discovered in 1784 byWilliam Herschel.The galactic features suggest it may have undergone a merger with a gas-rich companion, giving it asymmetricalarms,plusstarburst activityin the nucleus and an off-planar nuclear ring. The inner 3.6 kpc of the galaxy is undergoing star formation at the rate of 2.1–2.7M☉·yr−1,[7]but it lacks anuclear bulge.[5]
On October 16, 2008, a possiblesupernovaevent was observed about16.2″west and19.5″north of theGalactic Center.It reached magnitude 14.7 in theinfrared K' band,but only a possible very faint transient event was observed in the visual frequency range, most likely as a result of strongextinction.[8]
The group of galaxies around NGC 972 is sometimes referred to as the "NGC 972 group," which includes NGC 1012, NGC 1056, UGC 1958, UGC 2017, UGC 2053, and UGC 2221.[9][10]
References
[edit]- ^"In Bloom".spacetelescope.org.Retrieved1 July2019.
- ^abcd"NGC 972".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2020-04-05.
- ^abSkrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006)."The Two Micron All Sky Survey (2MASS)".The Astronomical Journal.131(2): 1163–1183.Bibcode:2006AJ....131.1163S.doi:10.1086/498708.ISSN0004-6256.S2CID18913331.
- ^abcTully, R. Brent; et al. (2016)."Cosmicflows-3".The Astronomical Journal.152(2): 21.arXiv:1605.01765.Bibcode:2016AJ....152...50T.doi:10.3847/0004-6256/152/2/50.S2CID250737862.50.
- ^abcdMayya, Y. D.; et al. (October 1998). "Near-Infrared and Optical Morphology of the Dusty Galaxy NGC 972".The Astronomical Journal.116(4): 1671–1678.arXiv:astro-ph/9808008.Bibcode:1998AJ....116.1671M.doi:10.1086/300574.S2CID11991856.
- ^"The galaxy NGC 972".In-The-Sky.org.
- ^Ravindranath, Swara; Prabhu, Tushar P. (June 1998)."Massive Star Formation in the Infrared-bright Galaxy NGC 972".The Astronomical Journal.115(6): 2320–2330.Bibcode:1998AJ....115.2320R.doi:10.1086/300355.
- ^Dudley, C. C.; et al. (October 2008). Green, D. W. E. (ed.). "Possible Reddened Supernovae in NGC 972 and NGC 5900".IAU Circular.8992:1.Bibcode:2008IAUC.8992....1D.
- ^Vennik, J.; Richter, G. M. (1994)."Surface Photometry of Low-Surface-Brightness Galaxies in the Area of the NGC 972 Group of Galaxies".Symposium - International Astronomical Union.161:553–555.doi:10.1017/S0074180900048075.ISSN0074-1809.
- ^Vennik, J.; Richter, G. M. (1994)."Photometry of groups of galaxies. II. The NGC 972 group".Astronomische Nachrichten.315(3): 245–251.Bibcode:1994AN....315..245V.doi:10.1002/asna.2103150306.ISSN1521-3994.
External links
[edit]
Media related toNGC 972at Wikimedia Commons- NGC 972 on SIMBAD
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