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The Distances to RR Lyrae Variables

Published online by Cambridge University Press:  19 July 2016

Rodney V. Jones ,
Bruce W. Carney ,
David W. Latham  and
Robert L. Kurucz
Rodney V. Jones
Affiliation:
University of North Carolina
Bruce W. Carney
Affiliation:
University of North Carolina
David W. Latham
Affiliation:
Harvard-Smithsonian Center for Astrophysics
Robert L. Kurucz
Affiliation:
Harvard-Smithsonian Center for Astrophysics

Extract

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Of all the different methods employed to estimate the mean absolute magnitude of RR Lyrae variables, only an analysis of the Baade-Wesselink type can determine this quantity directly. The distance to a globular cluster can therefore be measured by determining <MV>RR for that cluster instead of being forced to assume that <MV>RR is the same as that of the nearby field variables. This is important in that the field stars may have a different luminosity than cluster variables. In addition, since <MV>RR should depend on the composition (especially helium) and history of mass loss of these stars, this quantity may vary from cluster to cluster.

Type
Chapter VIII. Poster Papers on Cluster Systems in Nearby Galaxies
Information
Symposium - International Astronomical Union , Volume 126: The Harlow-Shapley Symposium on Globular Cluster Systems in Galaxies , 1988 , pp. 589 - 590
Copyright
Copyright © Kluwer 1988 

References

REFERENCES

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