How Rotation Affects Masses and Ages of Classical Cepheids

Abstract

Classical Cepheid variable stars are both sensitive astrophysical laboratories and accurate cosmic distance tracers. We have recently investigated how the evolutionary effects of rotation impact the properties of these important stars and here provide an accessible overview of some key elements as well as two important consequences. Firstly, rotation resolves the long-standing Cepheid mass discrepancy problem. Second, rotation increases main sequence lifetimes, i.e, Cepheids are approximately twice as old as previously thought. Finally, we highlight the importance of the short-period ends of Cepheid period distributions as indicators for model adequacy.

5 pages, 4 figures, proceedings of the 22nd Los Alamos Stellar Pulsation Conference "Wide-field variability surveys: a 21st-century perspective" held in San Pedro de Atacama, Chile, Nov. 28 - Dec. 2, 2016

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Cited by in corpus (4)

• On Cepheid Distance Scale Bias due to Stellar Companions and Cluster Populations
• The VMC Survey -- XXXV. Model fitting of LMC Cepheid light curves
• Homing in on Polaris: A 7 M${}_{\odot }$ first-overtone Cepheid entering the instability strip for the first time
• The stellar evolution perspective on the metallicity dependence of classical Cepheid Leavitt laws