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HI Profiles in the Bridge Region of the Megallanic Clouds

Published online by Cambridge University Press:  25 April 2016

R. X. McGee  and
Lynette M. Newton
R. X. McGee
Affiliation:
Division of Radiophysics, CSIRO, Sydney
Lynette M. Newton
Affiliation:
Division of Radiophysics, CSIRO, Sydney
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Abstract

Two hundred and seventeen HI profiles at positions approximately 1 ° apart in the bridge region between the Small and Large Magellanic Clouds have been observed with a 15’ arc beam. Diagrams of all the profiles, lists of column densities and average radial velocities are given, together with details of the extensive Gaussian analysis needed to account for the components.

It is shown that the bridge region is most complex. (a) Two radial velocity groups, +214 and +238 km s-1, represent the actual HI bridge between the two galaxies, (b) Three other components, at mean radial velocities of +155, +177 and +195 km s-1 are seen to be integral parts of the SMC, stretching east to R. A. ~ 04h. (c) A further three components in groups at mean radial velocities +253, +272 and +293 km s-1 appear to be extensions of HI from the main body of the LMC.

Nine sets of five closely spaced observations in the lower Magellanic Stream and in the bridge region at high sensitivity supply further information about the region.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 6 , Issue 4 , 1986 , pp. 471 - 500
Copyright
Copyright © Astronomical Society of Australia 1985

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