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RR Lyraes in the Magellanic Clouds

Published online by Cambridge University Press:  15 February 2018

Alistair R. Walker
Alistair R. Walker*
Affiliation:
Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile

Abstract

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Recent work on the Magellanic Cloud RR Lyrae stars is reviewed. The absolute magnitudes of LMC RR Lyraes, when calibrated from a distance modulus of 18.5 mag, disagrees with the Galactic calibration. The revised distance scale makes distances greater, and ages younger, within our galaxy. Field star studies show that the “halo” population of the LMC is very similar to that of our own Galaxy outside of the solar circle. This result supports a Searle and Zinn model of galaxy formation.

Type
Variable Stars as Distance Indicators
Information
International Astronomical Union Colloquium , Volume 139: New Perspectives on Stellar Pulsation and Pulsating Variable Stars , 1993 , pp. 15 - 20
Copyright
Copyright © Cambridge University Press 1993

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