| NGC 7214 | |
|---|---|
| 👁 Image HST image of NGC 7214 | |
| Observation data (J2000 epoch) | |
| Constellation | Piscis Austrinus |
| Right ascension | 22h 09m 07.66s[1] |
| Declination | −27° 48′ 34.08″[1] |
| Redshift | 0.023853[1] |
| Heliocentric radial velocity | 7151 ± 4 km/s[1] |
| Distance | 346.4 ± 24.3 Mly (106.22 ± 7.44 Mpc)[1] |
| Group or cluster | Hickson 91 |
| Apparent magnitude (V) | 12.5[2] |
| Characteristics | |
| Type | SB(s)bc pec: Sy1.2[1] |
| Size | ~461,000 ly (141.2 kpc) (estimated)[1] |
| Other designations | |
| 2dFGRS S175Z138, 2MASX J22090769-2748340, 6dF J2209076-274834, ESO 467-G012, HCG 091A, IRAS 22062-2803, PGC 68152, LEDA 3222105, RBS 1824[1] | |
NGC 7214 is a large barred spiral galaxy located in the southern constellation of Piscis Austrinus. The redshift of the galaxy is (z) 0.023[1] and it was first discovered by the British astronomer John Herschel in July 1834, who described the object as a possible globular cluster with an irregular center.[3] It is the brightest and largest member of the four galaxies in the Hickson 91 galaxy group known as the NGC 7214 group.[4][5] This galaxy is also classified as an active Seyfert galaxy of type 1 or type 1.2.[6][7]
Description
[edit]NGC 7214 is categorized as a late-type face-on spiral galaxy of type SBc.[4][8] The rotation curve for this galaxy is described as both irregular and asymmetric.[4] The central nucleus has a bright appearance, with spiral arms that are also bright on the inner side and much fainter outer spiral arms that are extended.[9] The nuclear emission region has a compact appearance with a weak H II region that is located in the east.[10]
NGC 7214 is undergoing an interaction with a smaller spiral galaxy companion (HCG 91c), given the presence of a large prominent tidal tail extending from it.[10][11][12] The tail structure has two components that point towards the northeast. The tail also contains star forming regions, given the traces of Hydrogen-alpha knots.[8] One of the spiral arms on the southern side is shown to have constant velocity likely caused through streaming motions by the interactions.[13] The central nucleus is surrounded by several H II regions having either moderate or weak signs of star formation.[14]
References
[edit]- ^ a b c d e f g h i "NED Search results for NGC 7214". NASA/IPAC Extragalactic Database. Retrieved 2026-03-12.
- ^ "Revised NGC Data for NGC 7214". spider.seds.org. Retrieved 30 March 2024.
- ^ "NGC Objects: NGC 7200 - 7249". cseligman.com. Retrieved 2026-03-12.
- ^ a b c Plana, H.; Amram, P.; de Oliveira, C. Mendes; Balkowski, C. (2009-11-18). "Mass Distribution in Hickson Compact Groups of Galaxies". The Astronomical Journal. 139 (1): 1–16. doi:10.1088/0004-6256/139/1/1. ISSN 0004-6256.
- ^ Morales, R. J. (1994). "The NGC 7214 galaxy group". Sky and Telescope. 88 (4): 106–107. Bibcode:1994S&T....88d.106M. ISSN 0037-6604.
- ^ Condon, J. J.; Yin, Q. F.; Thuan, T. X.; Boller, Th (December 1998). "The ROSAT/IRAS Galaxy Sample Revisited". The Astronomical Journal. 116 (6): 2682–2716. doi:10.1086/300624. ISSN 0004-6256.
- ^ Radovich, M.; Rafanelli, P. (1997). "Spectroscopic analysis of the circumnuclear regions of the Seyfert 1.2 galaxy NGC 7214". Memorie della Societa Astronomica Italiana. 68: 257–258. ISSN 0037-8720.
- ^ a b Eigenthaler, Paul; Ploeckinger, Sylvia; Verdugo, Miguel; Ziegler, Bodo (August 2015). "Star formation properties of Hickson Compact Groups based on deep Hα imaging". Monthly Notices of the Royal Astronomical Society. 451 (3): 2793–2813. arXiv:1505.01502. doi:10.1093/mnras/stv1037. ISSN 0035-8711.
- ^ Corwin, H. G.; de Vaucouleurs, A.; de Vaucouleurs, G. (1985). "Southern Galaxy Catalogue". University of Texas Monographs in Astronomy. 4: 1. Bibcode:1985MAUTx...4....1C.
- ^ a b Gonzalez Delgado, Rosa M.; Perez, Enrique; Tadhunter, Clive; Vilchez, Jose M.; Rodriguez-Espinosa, Jose Miguel (January 1997). "H ii Region Population in a Sample of Nearby Galaxies with Nuclear Activity. I. Data and General Results". The Astrophysical Journal Supplement Series. 108 (1): 155–198. doi:10.1086/312951. ISSN 0067-0049.
- ^ Ianjamasimanana, R.; Verdes-Montenegro, L.; Sorgho, A.; Hess, K. M.; Jones, M. G.; Cannon, J. M.; Solanes, J. M.; Cluver, M. E.; Moldón, J.; Namumba, B.; Román, J.; Labadie-García, I.; Casa, C. C. de la; Borthakur, S.; Wang, J. (2025-04-01). "MeerKAT view of Hickson Compact Groups - I. Data description and release". Astronomy & Astrophysics. 696: A176. doi:10.1051/0004-6361/202453005. ISSN 0004-6361.
- ^ Sorgho, A.; Verdes-Montenegro, L.; Ianjamasimanana, R.; Hess, K. M.; Jones, M. G.; Korsaga, M.; Wang, J.; Lin, X.; Solanes, J. M.; Cluver, M. E.; Cannon, J. M.; Bosma, A.; Athanassoula, E.; Olmo, A. del; Perea, J. (2025-04-01). "MeerKAT view of Hickson Compact Groups - II. HI deficiency in the cores and surrounding regions". Astronomy & Astrophysics. 696: A177. doi:10.1051/0004-6361/202452995. ISSN 0004-6361.
- ^ Amram, P.; Plana, H.; Balkowski, C.; Boulesteix, J. (2003-05-01). "Gas kinematics of a sample of five Hickson Compact Groups - The data" (PDF). Astronomy & Astrophysics. 402 (3): 865–877. doi:10.1051/0004-6361:20030034. ISSN 0004-6361.
- ^ Radovich, Mario; Rafanelli, Piero; Barbon, Roberto (June 1998). "Spectroscopy of the circumnuclear emission line regions in Seyfert galaxies. II. NGC 7214". Astronomy and Astrophysics. 334: 124–138. ISSN 0004-6361.
External links
[edit]- NGC 7214 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
