NGC 5474
From Wikipedia, the free encyclopedia
| NGC 5474 | |
 An ultraviolet image of NGC 5474 taken with GALEX. Credit: GALEX/NASA. |
|
| Observation data (J2000 epoch) | |
|---|---|
| Constellation | Ursa Major[1] |
| Right ascension | 14h 05m 01.6s[2] |
| Declination | +53° 39′ 44″[2] |
| Redshift | 273 ± 9 km/s[2] |
| Distance | 22 Mly (6.8 Mpc)[3] |
| Type | SA(s)cd pec[2] |
| Apparent dimensions (V) | 4′.8 × 4′.3[2] |
| Apparent magnitude (V) | 11.3[2] |
| Other designations | |
| UGC 9013,[2] PGC 50216[2] | |
| See also: Galaxy, List of galaxies | |
NGC 5474 is a peculiar dwarf galaxy in the constellation Ursa Major. It is one of several companion galaxies of the Pinwheel Galaxy (M101), a grand-design spiral galaxy[4][3]. Among the Pinwheel Galaxy's companions, this galaxy is the closest to the Pinwheel Galaxy itself[3]. The gravitational interaction between NGC 5474 and the Pinwheel Galaxy have strongly distorted the galaxy. As a result, the disk is offset relative to the nucleus[3][5]. The star formation in this galaxy (as traced by hydrogen spectral line emission) is also offset from the nucleus[5].
[edit] References
- ^ R. W. Sinnott, editor (1988). The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation and Cambridge University Press. ISBN 0-933-34651-4.
- ^ a b c d e f g h NASA/IPAC Extragalactic Database. Results for NGC 5474. Retrieved on 2006-09-20.
- ^ a b c d Drozdovsky, I. O.; Karachentsev, I. D. (2000). "Photometric distances to six bright resolved galaxies". Astronomy and Astrophysics Supplement 142: 425–432. doi:.
- ^ A. Sandage, J. Bedke (1994). Carnegie Atlas of Galaxies. Washington, D.C.: Carnegie Institution of Washington. ISBN 0-87279-667-1.
- ^ a b R. M. Gonzalez Delgado, E. Perez, C. Tadhunter J. M. Vilchez, J. M. Rodriguez-Espinosa (2000). "H II Region Population in a Sample of Nearby Galaxies with Nuclear Activity. I. Data and General Results". Astrophysical Journal Supplement 108: 155. doi:.
