NGC 7280
| NGC 7280 | |
|---|---|
 NGC 7280 imaged by Sloan Digital Sky Survey | |
| Observation data (J2000 epoch) | |
| Constellation | Pegasus |
| Right ascension | 22h 26m 27.5764s[1] |
| Declination | +16° 08′ 53.493″[1] |
| Redshift | 0.006164 ± 0.000013 [1] |
| Heliocentric radial velocity | 1,848 ± 4 km/s[1] |
| Distance | 75.5 ± 7.1 Mly (23.15 ± 2.2 Mpc)[1] |
| Apparent magnitude (V) | 12.1[2] |
| Characteristics | |
| Type | SAB(r)0+ [1] |
| Size | ~48,000 ly (14.7 kpc) (estimated)[1] |
| Apparent size (V) | 2.2′ × 1.5′[1] |
| Other designations | |
| UGC 12035, MCG +03-57-005, PGC 68870, CGCG 452-011[1] | |
NGC 7280 is a lenticular galaxy in the constellation Pegasus. The galaxy lies about 75 million light years away from Earth, which means, given its apparent dimensions, that NGC 7280 is approximately 50,000 light years across.[1] It was discovered by William Herschel on October 15, 1784.[3]
NGC 7280 is a lenticular galaxy which is noted for having an inner gaseous polar ring.[4] Dust lanes or rings are visible around the nucleus perpendicular to the major axis of the galaxy.[5] The stellar population in the nucleus is younger than the surrounding area, with an estimated age of 1.5 ± 0.5 billion years, and has higher metallicity. A circumnuclear stellar disk about 1 arcsecond across has been detected by the Hubble Space Telescope.[6] The galaxy also features an intermediate bar.[6][7] Beyond the central region the gas and stars counter-rotate. The gas is also asymmetrically distributed. The gas was probably accreted recently because it exhibits shock-wave excitation. There is no active star formation detectable and there is no H-alpha emission from the nucleus.[4] The galaxy is rich in hydrogen, with an estimated hydrogen mass of 109 M☉.[6]
NGC 7280 is the foremost galaxy of the NGC 7280 Group, along with PGC 141021, UGCA 429, and UGC 12090.[8] NGC 7280 interacts with UGCA 429, which lies 3.8 arcminutes away, as there is a hydrogen tail extending from the opposite side from NGC 7280.[9]
Gallery
The central region of NGC 7280 by the Hubble Space Telescope
References
- ^ a b c d e f g h i j "Results for object NGC 7280". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 26 February 2025.
- ^ "Revised NGC Data for NGC 7280". spider.seds.org. Retrieved 30 March 2024.
- ^ Seligman, Courtney. "NGC 7280 (= PGC 68870)". Celestial Atlas. Retrieved 19 November 2018.
- ^ a b Sil’chenko, Olga K.; Moiseev, Alexei V.; Egorov, Oleg V. (1 September 2019). "The Gas Kinematics, Excitation, and Chemistry, in Connection with Star Formation, in Lenticular Galaxies". The Astrophysical Journal Supplement Series. 244 (1): 6. arXiv:1907.07261. Bibcode:2019ApJS..244....6S. doi:10.3847/1538-4365/ab3415.
- ^ Carollo, C. M.; Stiavelli, M.; de Zeeuw, P. T.; Mack, J. (December 1997). "Spiral Galaxies with WFPC2.I.Nuclear Morphology, Bulges, Star Clusters, and Surface Brightness Profiles". The Astronomical Journal. 114: 2366. Bibcode:1997AJ....114.2366C. doi:10.1086/118654.
- ^ a b c Afanasiev, V. L.; Sil’chenko, O. K. (January 2000). "Young Stellar Nuclei in the Lenticular Galaxies. II. NGC 7280". The Astronomical Journal. 119 (1): 126–135. Bibcode:2000AJ....119..126A. doi:10.1086/301162.
- ^ Gadotti, D. A.; Athanassoula, E.; Carrasco, L.; Bosma, A.; De Souza, R. E.; Recillas, E. (25 September 2007). "Near-infrared surface photometry of a sample of barred galaxies: NIR surface photometry of barred galaxies". Monthly Notices of the Royal Astronomical Society. 381 (3): 943–961. doi:10.1111/j.1365-2966.2007.12295.x.
- ^ Makarov, Dmitry; Karachentsev, Igor (21 April 2011). "Galaxy groups and clouds in the local (z~ 0.01) Universe". Monthly Notices of the Royal Astronomical Society. 412 (4): 2498–2520. arXiv:1011.6277. Bibcode:2011MNRAS.412.2498M. doi:10.1111/j.1365-2966.2010.18071.x. S2CID 119194025. Retrieved 1 February 2025.
- ^ Duprie, Kimberly; Schneider, Stephen E. (September 1996). "Neutral Hydrogen Around Early-Type Galaxies". The Astronomical Journal. 112: 937. Bibcode:1996AJ....112..937D. doi:10.1086/118067.
External links
- NGC 7280 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- NGC 7280 on SIMBAD
