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Variable Stars in the Metal-Rich Globular Clusters NGC 6388 and NGC 6441

Published online by Cambridge University Press:  12 April 2016

Barton Pritzl ,
Horace A. Smith ,
Márcio Catelan  and
Allen V. Sweigart
Barton Pritzl
Affiliation:
Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
Horace A. Smith
Affiliation:
Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
Márcio Catelan
Affiliation:
Hubble Fellow, University of Virginia, Department of Astronomy, P.O. Box 3818, Charlottesville, VA 22903, USA
Allen V. Sweigart
Affiliation:
NASA/Goddard Space Flight Center, Laboratory for Astronomy and Solar Physics, Code 681, Greenbelt, MD 20771, USA

Abstract

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New observations show that RR Lyrae stars in the metal-rich globular clusters NGC 6388 and NGC 6441 have unusually long periods, which indicate that the horizontal branches of these clusters are unusually bright for their metallicities, as predicted by Sweigart & Catelan (1998).

Type
Part 3. Cepheids, RR Lyrae Stars, Distance Scales
Information
International Astronomical Union Colloquium , Volume 176: The Impact of Large-Scale Surveys on Pulsating Star Research , 2000 , pp. 261 - 262
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

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