AAS 199th meeting, Washington, DC, January 2002
Session 137. Topics in Stellar Evolution
Display, Thursday, January 10, 2002, 9:20am-4:00pm, Exhibit Hall

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[137.09] Bump Cepheids and the Stellar Mass-Luminosity Relation

S. C. Keller (IGPP/LLNL), P. R. Wood (RSAA, Australian National University), Djehuty Team

We present the results of nonlinear pulsation modeling of a sample of bump Cepheids from the Magellanic Clouds. Photometry is taken from the Macho database. In fitting the observed lightcurve it is possible to detach the mass, luminosity and Teff for each Cepheid. We use these results to describe the observed mass-luminosity relationship for stars of mass 4-10Mo. This reveals the necessity for a larger degree of internal mixing whilst on the main-sequence than is currently implemented in stellar evolutionary models.

The author(s) of this abstract have provided an email address for comments about the abstract: skeller@igpp.ucllnl.org

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