THE PERIOD CHANGE OF THE CEPHEID POLARIS SUGGESTS ENHANCED MASS LOSS

@article{Neilson2012THEPC,
  title={THE PERIOD CHANGE OF THE CEPHEID POLARIS SUGGESTS ENHANCED MASS LOSS},
  author={Hilding R. Neilson and Scott G. Engle and Edward F. Guinan and Norbert Langer and Richard P. Wasatonic and David B. Williams},
  journal={The Astrophysical Journal Letters},
  year={2012},
  volume={745}
}
Polaris is one of the most observed stars in the night sky, with recorded observations spanning more than 200 years. From these observations, one can study the real-time evolution of Polaris via the secular rate of change of the pulsation period. However, the measurements of the rate of period change do not agree with predictions from state-of-the-art stellar evolution models. We show that this may imply that Polaris is currently losing mass at a rate of yr−1 based on the difference between… 
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