Phoenix Dwarf

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Phoenix Dwarf
Observation data (J2000 epoch)
Constellation Phoenix
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.

Characteristics[edit]

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]

Phoenix Dwarf by HST

References[edit]

  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for Phoenix Dwarf. Retrieved 2007-03-15. 
  2. ^ 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. 
  3. ^ 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. 
  4. ^ Schuster, H.-E.; West, R. M. (May 1976). "A very distant globular cluster?". Astronomy & Astrophysics 49: 129–131. Bibcode:1976A&A....49..129S. 
  5. ^ 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. 
  6. ^ 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. 

External links[edit]

Coordinates: Sky map 01h 51m 06.3s, −44° 26′ 41″