Cepheid Masses - Cyc 4 High - Part 2

Details Cepheid Masses - Cyc 4 High - Part 2 Cepheid Masses - Cyc 4 High - Part 2

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5673b&link_type=abstract

HST Proposal ID #5673

Physics

Hst Proposal Id #5673 Cool Stars Pulsating Stars

Scientific paper

For 2 decades the "Cepheid mass problem" has persisted: Mass determinations from standard evolutionary tracks and those from pulsation theory gave conflicting values. The luminosity of a Cepheid of given mass depends sensitively on the amount of convective overshoot above the core of the main sequence progenitor. Hence a good mass determination for the Cepheid with known luminosity will measure the amount of convective core overshoot. This knowledge is important for interpretation of HR diagrams of populous clusters in the LMC and especially for age determinations. It is also necessary for the understanding of the mixing processes in stars. Program 5357 obtained the GHRS spectra for this program. This is a follow-on part 2 to obtain the calibration spectra to measure the radial velocity of the 2 primary targets observed in 5357.

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