Cepheid Mass-loss and the Pulsation -- Evolutionary Mass Discrepancy

Details Cepheid Mass-loss and the Pulsation -- Evolutionary Mass Discrepancy Cepheid Mass-loss and the Pulsation -- Evolutionary Mass Discrepancy

2008-01-09

arxiv.org/abs/0801.1342v1

Astronomy and Astrophysics

Astrophysics

15 pages, 3 figures, ApJ accepted

Scientific paper

10.1086/529366

I investigate the discrepancy between the evolution and pulsation masses for Cepheid variables. A number of recent works have proposed that non-canonical mass-loss can account for the mass discrepancy. This mass-loss would be such that a 5Mo star loses approximately 20% of its mass by arriving at the Cepheid instability strip; a 14Mo star, none. Such findings would pose a serious challenge to our understanding of mass-loss. I revisit these results in light of the Padova stellar evolutionary models and find evolutionary masses are ($17\pm5$)% greater than pulsation masses for Cepheids between 5

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