AAS Meeting #194 - Chicago, Illinois, May/June 1999
Session 4. Evolution of Galaxies, Galaxy Surveys
Display, Monday, May 31, 1999, 9:20am-6:30pm, Southwest Exhibit Hall

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[4.08] New HI-Detected Galaxies in the Zone of Avoidance

S. Juraszek (University of Sydney, ATNF), L. Staveley-Smith (ATNF), R.D. Ekers (ATNF), P.A. Henning (University of New Mexico), R.C. Kraan-Korteweg (University of Guanajuato), B.S. Koribalski (ATNF), A.J. Green (University of Sydney), E.M. Sadler (University of Sydney), M. Price (ATNF), R.F. Haynes (ATNF), A. Schroder (Observatoire de la Cote d'Azur), Southern Zone of Avoidance Survey Team

Within 10\circ of the Galactic Plane it is extremely difficult to optically identify galaxies because of extinction from intervening dust, high stellar densities and confusion from Galactic sources. In this region, identifications are biased towards nearby luminous galaxies and sample uniformity is hampered by patchines in the Galactic extinction. To determine a clearer picture of the local distribution of galaxies in the so-called Zone of Avoidance (ZOA), we present some early results from the blind neutral hydrogen (HI) survey of the southern ZOA, carried out using the 21cm multibeam receiver on the Parkes telescope.

We have detected about 250 galaxies in a 10\circ wide strip centred on the Galactic equator, extending from Galactic longitude 300\circ to 332\circ, in the velocity range of -1200 to 12700 km s-1. The sensitivity limit at the 3\sigma level is 25 mJy, with 70% of the detections having no previous identification. The distribution of galaxies confirms the connection between the Centaurus supercluster above the Galactic Plane and the Pavo-Indus supercluster beneath the Plane.

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