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High velocity clouds near the Magellanic Clouds

Published online by Cambridge University Press:  19 July 2016

Ulrich Mebold
Ulrich Mebold*
Affiliation:
Radioastronomisches Institut der Universität Bonn, Auf dem Hügel 71, D-5300 Bonn 1, Federal Republic of Germany

Abstract

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High velocity clouds (HVCs) of neutral atomic hydrogen close to the position of the Magellanic Clouds (MCs) and the Magellanic Stream (Stream) are reviewed. The gas observed at velocities of +70 km/s and +130 km/s in front of the LMC is probably associated with ordinary HVCs in the galactic halo. This is not the case for the gas observed between +150 and +170 km/s which is more likely associated with the MCs. The HVCs observed superimposed onto the Stream are possibly remnants of collisions between a gaseous polar ring around our Galaxy and the bridge region between the MCs. The HVCs found close to and “behind” the tip of the Stream may be regarded as shreds of the Stream precipitating toward the galactic disk. The chemical composition, the radiation field and the temperature in the Stream is discussed in the context of the first spin temperature determination by Wakker (1990), of an HVC.

Type
The LMC-SMC-Galaxy System
Information
Symposium - International Astronomical Union , Volume 148: The Magellanic Clouds , 1991 , pp. 463 - 468
Copyright
Copyright © Kluwer 1991 

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