Template:Short description Template:Infobox Galaxy
The Pegasus Dwarf Irregular Galaxy (also known as Peg DIG or the Pegasus Dwarf) is a dwarf irregular galaxy in the direction of the constellation Pegasus. It was discovered by A. G. Wilson in the 1950s. The Pegasus Dwarf is a companion of the Andromeda Galaxy in the Local Group.
General informationEdit
In 1975 Tully & Fisher determined that it was part of the Local Group.<ref name="Gallagerl998">Template:Cite journal</ref> The metallicity and the related distance estimate has been subject to discussions in the scientific literature, with varying results; however, recently, by use of the tip of the red-giant branch, a distance within 10% error was achieved in 2000<ref name="Karachentsevetal2004">Template:Cite journal</ref><ref name="van den Bergh2000">Template:Cite book</ref> and then improved to 3% in 2005.<ref name="McConnachieetal2005">Template:Cite journal</ref>
In popular cultureEdit
The science fiction television series Stargate Atlantis takes place in the "Pegasus galaxy" and has shown images of an irregular galaxy. However, the franchise has not explicitly stated if it is the Irregular, Spheroidal, or an entirely fictional location,<ref name="The Return">"The Return" (Stargate Atlantis)</ref> but since the series claimed the Pegasus galaxy to be 3 million light years away, it is likely the irregular one.
See alsoEdit
- Pegasus Dwarf Spheroidal Galaxy (Peg dSph)
- Pegasus galaxy, the Stargate Atlantis fictional location.
NotesEdit
- Template:Note labelNED gives the galaxy classification as both dIrr and dSph, which means that it is a transitory between dwarf irregular and dwarf spheroidal. It is noted as transitory in Cole et al. 1999.<ref name="Coleetal1999">Template:Cite journal</ref>