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Session 51 - New Views of the Magellanic Clouds - I.
Oral session, Wednesday, June 12
Historical Society,

[51.04] An HI Aperture Synthesis Mosaic of the Magellanic Clouds

L. Staveley-Smith (ATNF), S. Kim (MSSSO)

We present the results of a survey of neutral hydrogen emission in the Magellanic Clouds with the Australia Telescope Compact Array. For the SMC, the angular resolution is 1\farcm6 over a field of 20 deg^2. For the LMC, the angular resolution is 0\farcm8 over a field of 130 deg^2. For both clouds, the velocity resolution is 1.6 km s^-1. In the SMC, we have kinematically identified eight supershells and nearly 500 giant shells. We use these to study the three-dimensional structure of the SMC and its evolutionary history. A burst of star-formation of age 5.4 Myr appears responsible for much of the present state of the interstellar medium in SMC. A preliminary analysis of our results for the LMC has identified, for the first time, a southern spiral arm.

Program listing for Wednesday