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Variable Stars and Galactic Structure

Published online by Cambridge University Press:  06 January 2014

Michael Feast  and
Patricia A. Whitelock
Michael Feast
Affiliation:
University of Cape Town and South African Astronomical Observatory email: mwf@ast.uct.ac.za
Patricia A. Whitelock
Affiliation:
South African Astronomical Observatory and University of Cape Town email: paw@saao.ac.za
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Abstract

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Variable stars have a unique part to play in Galactic astronomy. Among the most important of these variables are the Cepheids (types I and II), the RR Lyraes and the Miras (O- and C-rich). The current status of the basic calibration of these stars in their roles as distance, structure and population indicators is outlined and some examples of recent applications of these stars to Galactic and extragalactic problems are reviewed. The expected impact of Gaia on this type of work is discussed and the need for complementary ground based observations, particularly large scale near-infrared photometry, is stressed.

Keywords

Distance ScaleVariable StarsGalactic Structure

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