http://planxty.stsci.edu:1024:/dogs/dogs.html (World Wide Web Directory, ~04/1995)
Dwingeloo 1
Discovery of a Nearby Spiral Galaxy Behind the Milky Way
R.C. Kraan-Korteweg (Groningen), A.J. Loan (Cambridge), W.B. Burton (Leiden)
O. Lahav (Cambridge), H.C. Ferguson (STScI), P.A. Henning (Univ. New Mexico),
D. Lynden-Bell (Cambridge)
Color image of Dwingeloo 1 from the Isaac Newton
Telescope
The full paper (100 Kb postscript file)
appears in Nature, November 3 1994.
Summary
The disk of the Milky Way contains a lot of gas and dust, which
obscures about 20% of the extragalactic sky. Galaxies hidden behind
the Milky Way may have an important influence on the dynamics of
the Local Group and its peculiar motion relative to the cosmic
microwave background radiation. Here we report the discovery
of a large spiral galaxy, which we call Dwingeloo 1, during the course
of a search for emission from atomic hydrogen (HI) associated with
galaxies hidden by the disk of the Milky Way -- such emission is not
obscured by the disk if the velocity of the emission differs from that of
the local gas. The new galaxy seems to be associated with the group
containing IC342 and the Maffei galaxies, and a subsequent optical image
suggests that it is of type SBb. The detection of Dwingeloo 1 early in the
course of this survey suggests that many more galaxies hidden behind the
Milky Way remain to be discovered.
Harry Ferguson ferguson@stsci.edu