Phoenix Dwarf
| Phoenix Dwarf | |
|---|---|
| Observation data (J2000 epoch) | |
| Constellation | Phoenix constellation |
| Right ascension | 01h 51m 06.3s[1] |
| Declination | -44° 26′ 41″[1] |
| Redshift | 60 ± 30 km/s[1] |
| Distance | 1.44 ± 0.07 Mly (440 ± 20 kpc)[2][3] |
| Type | IAm[1] |
| Apparent dimensions (V) | 4′.9 × 4′.1[1] |
| Apparent magnitude (V) | 13.1[1] |
| Notable features | - |
| Other designations | |
| ESO 245- G 007,[1] PGC 6830[1] | |
| See also: Galaxy, List of galaxies | |
The Phoenix Dwarf is a dwarf galaxy and an irregular galaxy that was discovered in 1976 by Hans-Emil Schuster and Richard Martin West and mistaken for a globular cluster.[4][5] It is currently 1.44 Mly away from Earth. Its name comes from the fact that it is part of the Phoenix constellation.
[edit] Characteristics
The Phoenix dwarf has an inner part of young stars running in an east-west direction and an outer part of mainly old stars that runs north-south. The central region's rate of star formation seems to have been relatively constant across time (Martínez-Delgado et al. 1999). In 1999, St-Germain et al. discovered a H I region of about 105 M☉ just to the west of Phoenix. Its radial velocity is -23 km/s and may be physically associated with Phoenix if it is found to have a similar radial velocity.[6]
[edit] References
- ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for Phoenix Dwarf. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=Phoenix+Dwarf#ObjNo1. Retrieved 2007-03-15.
- ^ I. D. Karachentsev, V. E. Karachentseva, W. K. Hutchmeier, D. I. Makarov (2004). "A Catalog of Neighboring Galaxies". Astronomical Journal 127 (4): 2031–2068. Bibcode 2004AJ....127.2031K. doi:10.1086/382905.
- ^ Karachentsev, I. D.; Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics 49 (1): 3–18. Bibcode 2006Ap.....49....3K. doi:10.1007/s10511-006-0002-6.
- ^ Schuster, H.-E.; West, R. M. (05/1976). "A very distant globular cluster?". Astronomy & Astrophysics 49: 129–131. Bibcode 1976A&A....49..129S
- ^ Canterna, R.; Flower, P. J. (March 1977). "A new dwarf irregular galaxy in the constellation Phoenix". Astrophysical Journal 212 (Letters): L57–L58. Bibcode 1977ApJ...212L..57C. doi:10.1086/182374
- ^ van den Bergh, Sidney (April 2000). "Updated Information on the Local Group". The Publications of the Astronomical Society of the Pacific 112 (770): 529–536. arXiv:astro-ph/0001040. Bibcode 2000PASP..112..529V. doi:10.1086/316548
[edit] External links
- The Phoenix Dwarf on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
