Sculptor Dwarf Galaxy

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Sculptor Dwarf Elliptical Galaxy
Sculptor Dwarf Galaxy.jpg
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]
Apparent magnitude (V) 10.1[1]
Characteristics
Type E[1]
Apparent size (V) 39′.8 × 30′.9[1]
Other designations
Sculptor Dwarf Spheroidal,[1] PGC 3589,[1] MCG-06-03-015
See also: Galaxy, List of galaxies

The Sculptor Dwarf Galaxy (also known as 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 1937 by American astronomer Harlow Shapley using the 24-inch Bruce refractor at Boyden Observatory.[4][5] The galaxy is located about 290,000 light-years away from the Solar System. The Sculptor Dwarf contains only 4 percent of the carbon and other heavy elements in our own galaxy, the Milky Way, making it similar to primitive galaxies seen at the edge of the universe.[6]

Metallicity[edit]

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.[7] Similar to many of the other Local Group galaxies, the older metal-poor segment appears more extended than the younger metal-rich segment.[8]

Gallery[edit]

References[edit]

  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for PGC 3589. Retrieved 2006-12-03. 
  2. ^ I. D. Karachentsev; V. E. Karachentseva; W. K. Hutchmeier; D. I. Makarov (2004). "A Catalog of Neighboring Galaxies". Astronomical Journal (abstract). 128 (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. ^ Shapley, H., (1938) Harvard Bull. 908.
  5. ^ Shapley H (1938). "Two Stellar Systems of a New Kind". Nature. 142 (3598): 715–6. Bibcode:1938Natur.142..715S. doi:10.1038/142715b0. 
  6. ^ Astronomers Detect Dust Around a Primitive Star, Shedding New Light on Universe’s Origins Newswise, Retrieved on January 19, 2008.
  7. ^ S.R. Majewski; et al. (20 July 1999). "An Internal Second-Parameter Problem in the Sculptor Dwarf Spheroidal Galaxy". The Astrophysical Journal. 520 (1). Bibcode:1999ApJ...520L..33M. arXiv:astro-ph/9905238Freely accessible. doi:10.1086/312133. 
  8. ^ 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. Bibcode:2000PASP..112..529V. arXiv:astro-ph/0001040Freely accessible. doi:10.1086/316548. 
  9. ^ "Sculptor Dwarf Galaxy". Retrieved 17 September 2015. 

External links[edit]

Coordinates: Sky map 01h 00m 09.3s, −33° 42′ 33″