Sculptor Dwarf Galaxy
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- For the nearby irregular galaxy within the constellation Sculptor, see Sculptor Dwarf Irregular Galaxy.
| Sculptor Dwarf Elliptical Galaxy | |
| Observation data (J2000 epoch) | |
|---|---|
| Constellation | Sculptor |
| Right ascension | 01h 00m 09.3s[1] |
| Declination | -33° 42′ 33″[1] |
| Redshift | 110 ± 1 km/s[1] |
| Distance | 290 ± 30 kly (90 ± 10 kpc)[2][3] |
| Type | E[1] |
| Apparent dimensions (V) | 39′.8 × 30′.9[1] |
| Apparent magnitude (V) | 10.1[1] |
| Other designations | |
| Sculptor Dwarf Spheroidal[1] PGC 3589[1] | |
| See also: Galaxy, List of galaxies | |
The Sculptor Dwarf Galaxy (also called the Sculptor Dwarf Elliptical Galaxy or the Sculptor Dwarf Spheroidal Galaxy) is a dwarf spheroidal galaxy that is a satellite of the Milky Way. The galaxy lies within the constellation Sculptor. It was discovered in 1938 by Harlow Shapley.[citation needed] The galaxy is located about 290,000 light-years away from the solar system.
[edit] Metallacity
In 1999, Majewski et al. determined that the metallicity of Sculptor dwarf appears to be broken up into two distinct groups, one with [Fe/H] = -2.3 and the other with [Fe/H] = -1.5. Similar to many of the other Local Group galaxies, the older metal-poor segment appears more extended than the younger metal-rich segment.[4]
[edit] References
- ^ a b c d e f g h NASA/IPAC Extragalactic Database. Results for PGC 3589. Retrieved on 2006-12-03.
- ^ I. D. Karachentsev, V. E. Karachentseva, W. K. Hutchmeier, D. I. Makarov (2004). "A Catalog of Neighboring Galaxies" (abstract). Astronomical Journal 127: 2031-2068. doi:.
- ^ 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. doi:.
- ^ 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, <http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2000PASP..112..529V>
[edit] External links
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