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Paper: Bump Cepheids and the Stellar Mass-Luminosity Relation
Volume: 293, 3D Stellar Evolution
Page: 285
Authors: Keller, S. C.; Wood, P. R.
Abstract: We present the results of non-linear pulsation modeling of bump Cepheids in the LMC and SMC. By obtaining an optimal fit to the observed MACHO V and R lightcurves we can determine the fundamental parameters of each Cepheid, namely mass, luminosity, effective temperature, distance modulus and reddening. We are able to describe the mass-luminosity relation for core-He burning intermediate mass stars. The mass-luminosity relation depends critically upon the level of internal mixing during the course of the star's main-sequence evolution. Under the paradigm of convective core overshoot, our results enable us to place tight quantitative limits of the level of overshoot. We derive an overshooting parameter of Lambda c of 0.65 +/- 0.03 and 0.67 +/- 0.04 l/Hp for the LMC and SMC respectively.
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