Astronomy:Sculptor Dwarf Irregular Galaxy

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Short description: Irregular galaxy in the constellation Sculptor
Sculptor Dwarf Irregular
PGC 621 Hubble-WikiSky.jpg
Sculptor Dwarf Irregular Galaxy close up by Hubble Space Telescope.
Observation data (J2000 epoch)
ConstellationSculptor
Right ascension 00h 08m 13.36s[1]
Declination−34° 34′ 42.0″[1]
Redshift221 ± 6 km/s[2]
Distance10.44 ± 0.33 Mly (3.2 ± 0.1 Mpc)[1]
Apparent magnitude (V)15.5[2]
Absolute magnitude (V)−11.87[1]
Characteristics
TypedIrr[1]
Apparent size (V)1.1′ × 0.9′[2]
Half-light radius (apparent)29″.4 ± 1″.6[1]
Other designations
SDIG,[2] PGC 621,[2] ESO 349-031[2]

The Sculptor Dwarf Irregular Galaxy (SDIG) is an irregular galaxy in the constellation Sculptor. It is a member of the NGC 7793 subgroup of the Sculptor Group.[1] The galaxy was discovered in 1976.[citation needed]


Nearby galaxies and galaxy group information

The Sculptor Dwarf Irregular Galaxy and the dwarf galaxy UGCA 442 are both companions of the spiral galaxy NGC 7793.[3] These galaxies all lie within the Sculptor Group, a weakly bound, filament-like group of galaxies located near the Local Group.[3]

See also

  • Sculptor Dwarf Galaxy – a dwarf spheroidal or elliptical galaxy, also in Sculptor, but significantly closer; a satellite of the Milky Way.

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Lianou, S.; Cole, A. A. (2013). "The star formation history of the Sculptor dwarf irregular galaxy". Astronomy & Astrophysics 549: A47. doi:10.1051/0004-6361/201220193. Bibcode: 2013A&A...549A..47L. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "NASA/IPAC Extragalactic Database". Results for Sculptor Dwarf Irregular. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=Sculptor+Dwarf+Irregular#ObjNo1. Retrieved 2007-03-15. 
  3. ↑ 3.0 3.1 I. D. Karachentsev; E. K. Grebel; M. E. Sharina; A. E. Dolphin et al. (2003). "Distances to nearby galaxies in Sculptor". Astronomy and Astrophysics 404 (1): 93–111. doi:10.1051/0004-6361:20030170. Bibcode: 2003A&A...404...93K. 

External links

Coordinates: Sky map 00h 08m 13.3s, −34° 34′ 42″




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