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Theoretical Expectations for Clump Red Giants as Distance Indicators
Published online by Cambridge University Press: 30 March 2016
Abstract
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Variations of ~ 0.4 mag are expected in the I-band absolute magnitude of red clump giants, , as a function of both stellar age and metallicity. This is the case regardless of some potential theoretical uncertainties. The quite large differences in mean ages and metallicities of clump stars among galaxies result in systematic changes (of up to ~ 0.4 mag) in their
. These numbers also indicate a distance to the LMC that is not necessarily “short”.
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- II. Joint Discussions
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- Copyright © Astronomical Society of Pacific 2002