NGC 1222
View on Wikipedia| NGC 1222 | |
|---|---|
 Image of NGC 1222, taken by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Eridanus |
| Right ascension | 03h 08m 56.747s[1] |
| Declination | −02° 57′ 18.76″[1] |
| Redshift | 0.008079[2] |
| Heliocentric radial velocity | 2422 km/s[2] |
| Distance | 109 Mly (33.3 Mpc)[3] |
| Apparent magnitude (V) | 12.5[4] |
| Apparent magnitude (B) | 13.5[4] |
| Characteristics | |
| Type | S0− pec[2] |
| Size | 32,300 ly (9,890 pc) |
| Apparent size (V) | 1.1′ × 0.9′ |
| Notable features | Starburst galaxy |
| Other designations | |
| Mrk 603, MCG-01-09-005, PGC 11774[5] | |
NGC 1222 is an early-type lenticular galaxy located in the constellation of Eridanus. The galaxy was discovered on 5 December 1883 by the French astronomer Édouard Stephan.[6] John Louis Emil Dreyer, the compiler of the New General Catalogue, described it as a "pretty faint, small, round nebula" and noted the presence of a "very faint star" superposed on the galaxy.[6]
NGC 1222's morphological type of S0− would suggest that it should have a mostly smooth profile and a very dull appearance. However, the galaxy was imaged by the Hubble Space Telescope in 2016, and the image showed that there were several bright blue star forming regions, as well as dark reddish areas of interstellar dust.[7]
Interaction
[edit]NGC 1222 is currently interacting with and swallowing two dwarf galaxies that are supplying the gas and dust needed to become a starburst galaxy.[7] The shockwaves produced by theses mergers causes some regions of NGC 1222 to heat up. There is also gas inflow.[8]
Supernova
[edit]One supernova has been observed in NGC 1222: SN 2024any (type Ia, mag. 17.59).[9]
See also
[edit]- NGC 1275, another starburst galaxy
References
[edit]- ^ a b Skrutskie, 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. ISSN 0004-6256. S2CID 18913331.
- ^ a b c "NED results for object NGC 1222". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 21 February 2017.
- ^ Cappellari, Michele; et al. (2011). "The ATLAS3D project – I. A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria". Monthly Notices of the Royal Astronomical Society. 413 (2): 813–836. arXiv:1012.1551. Bibcode:2011MNRAS.413..813C. doi:10.1111/j.1365-2966.2010.18174.x. S2CID 15391206.
- ^ a b Frommert, Hartmut. "Revised NGC Data for NGC 1222". seds.org. Retrieved 21 February 2017.
- ^ "NGC 1222". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 February 2017.
- ^ a b Seligman, Courtney. "NGC Objects: NGC 1200–1249". cseligman.com. Retrieved 21 February 2017.
- ^ a b "A greedy giant | ESA/Hubble". www.spacetelescope.org. 2016. Retrieved 21 February 2017.
- ^ Liu, Jiamin; Zhao, Yinghe; Lu, Kai-Xing; Bai, Jin-Ming (May 2025). "Properties of Interstellar Medium in the S0 Galaxy NGC 1222: Evidence for Shock-enhanced Line Emission". The Astrophysical Journal. 985 (1): 76. arXiv:2503.22466. Bibcode:2025ApJ...985...76L. doi:10.3847/1538-4357/adc732. ISSN 0004-637X.
- ^ Transient Name Server entry for SN 2024any. Retrieved 21 January 2024.
External links
[edit]
Media related to NGC 1222 at Wikimedia Commons
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