Sculptor Dwarf Irregular Galaxy

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.

Sculptor Dwarf Irregular
Observation data (J2000 epoch)
ConstellationSculptor
Right ascension00h 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]

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]

Sculptor Dwarf Irregular Galaxy close up by Hubble Space Telescope

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. Lianou, S.; Cole, A. A. (2013). "The star formation history of the Sculptor dwarf irregular galaxy". Astronomy & Astrophysics. 549: A47. arXiv:1211.0137. Bibcode:2013A&A...549A..47L. doi:10.1051/0004-6361/201220193. S2CID 55237783.
  2. "NASA/IPAC Extragalactic Database". Results for Sculptor Dwarf Irregular. Retrieved 2007-03-15.
  3. I. D. Karachentsev; E. K. Grebel; M. E. Sharina; A. E. Dolphin; et al. (2003). "Distances to nearby galaxies in Sculptor". Astronomy and Astrophysics (abstract). 404 (1): 93–111. arXiv:astro-ph/0302045. Bibcode:2003A&A...404...93K. doi:10.1051/0004-6361:20030170. S2CID 54977869.


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