Antlia Dwarf

Dwarf Spheroidal Galaxy Antlia Dwarf (PGC 29194), type dE3, in Antlia

[Ant Dw image]

10 : 04.1
-27 : 20
4600 kly
Apparent Dimension:
2.0 x 1.5 arc min
5.5 kly
14.8 m_vis
Abs. Mag:
Discovered by Corwin, de Vaucouleurs and de Vaucouleurs in 1985.

Antlia dwarf has been discovered by research students Alan Whiting and George Hau of Cambridge University (England) when visually inspecting UK Schmidt Telescope photographic survey plates; the discovery was announced on April 10, 1997 (see Whiting 1997). Within this work they also found the nearby probable non-member Argo Dwarf galaxy.

While it was the Cambridge team who identified this galaxy as a Local Group member candidate, it had been discovered previously by Corwin (1985). Also, it had been previously cataloged by Feitzinger and Galinski (1985) where it is No. 256, and by Fouque et. al. (1990) as PGC 29194. None of these references, however, led to its identification as a potential Local Group member.

The membership of this galaxy in the Local Group is still subject to current research and discussion. The Antlia dwarf is a member of a small group of galaxies around NGC 3109, which also contains the dwarf galaxies Sextans A and Sextans B. The group of Mike Irwin in Cambridge have it as a Local Group member, and Mateo (1998) counts it to the NGC 3109 subgroup of our small cluster of galaxies. On the other hand, van den Bergh (1999) takes this for a small but independent nearby group of galaxies, the nearest neighbor to our Local Group.


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Hartmut Frommert
Christine Kronberg

Last Modification: June 26, 2003