EPJ Web Conf.
Volume 152, 2017Wide-Field Variability Surveys: A 21st Century Perspective – 22nd Los Alamos Stellar Pulsation – Conference Series Meeting
|Number of page(s)||5|
|Section||Challenges for theory|
|Published online||08 September 2017|
How rotation affects masses and ages of classical Cepheids
1 Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USA
2 Départment d’Astronomie, Université de Genève, 1290 Sauverny, Switzerland
3 Astronomical Institute, Graduate School of Science, Tohoku University, Sendai, 980-8578 Miyagi, Japan
Published online: 8 September 2017
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.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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