Pegasus Dwarf Irregular Galaxy
From Wikipedia, the free encyclopedia
| Galaxy | List of galaxies |
|---|---|
| Observation data (Epoch J2000) |
|
| Constellation | Pegasus |
| Right ascension | 23h 28m 36.2s[1] |
| Declination | +14° 44′ 35″[1] |
| Redshift | -183 ± 0 km/s[1] |
| Distance | 2.5 ± 0.3 Mly (760 ± 80 kpc)[2] |
| Type | dIrr/dSph[1] |
| Apparent dimensions (V) | 5′.0 × 2′.7[1] |
| Apparent magnitude (V) | 13.2[1] |
| Notable features | |
| Other designations | |
|
Pegasus Dwarf,[1] PegDIG[1] |
|
The Pegasus Dwarf Irregular Galaxy (also known as Peg DIG or the Pegasus Dwarf) is an irregular galaxy and a dwarf galaxy in the direction of the constellation Pegasus. It was discovered by A.G. Wilson in the 1950s. The Pegasus Dwarf is a companion of the Andromeda Galaxy in the Local Group.
Contents |
[edit] General information
The Pegasus Dwarf is a galaxy with mainly metal-poor stellar populations.[citation needed]
In 1975 Tully & Fischer determined that it was part of the Local Group. The metallicity and the related distance estimate has been subject to discussions in the scientific literature, with varying results, however, recently, by use of the tip of the red giant branch, a distance within 10% error has been achieved.[3]
[edit] See also
- Pegasus Dwarf Spheroidal Galaxy (Peg dSph)
- Pegasus galaxy, the Stargate Atlantis fictional location.
[edit] External links
[edit] References
- ^ a b c d e f g h i j k NASA/IPAC Extragalactic Database. Results for PegDIG. Retrieved on 2006-11-11.
- ^ 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.
- ^ Karachentsev, Igor D.; Karachentseva, Valentina E.; Huchtmeier, Walter K.; Makarov, Dmitry I. (2004). "A Catalog of Neighboring Galaxies". The Astronomical Journal 127 (4): 2031-2068.
