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III. The Magellanic Clouds

Published online by Cambridge University Press:  14 August 2015

A. D. Thackeray

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The Magellanic Clouds offer a unique opportunity to study fully resolved stellar systems at, optical and radio wave-lengths. Optically, with the largest southern telescopes available it is possible to reach absolute magnitudes + 1 to + 2 by direct photography and absolute magnitudes - 6 to - 4 spectroscopically. The greatest value of the Clouds to galactic research is the opportunity to calibrate the absolute magnitudes of luminous objects within the Galaxy. Uncertainty regarding location in depth within the Clouds adds a random error of about ± 0·13 m, i.e. considerably less than the uncertainty of the distance modulus of the Clouds themselves.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 7: Second Conference on co-ordination of Galactic Research , 1959 , pp. 81 - 85
Copyright
Copyright © Cambridge University Press 1959 

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