Mass Loss and Stellar Evolution Models of Polaris

Details Mass Loss and Stellar Evolution Models of Polaris Mass Loss and Stellar Evolution Models of Polaris

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21915202n&link_type=abstract

American Astronomical Society, AAS Meeting #219, #152.02

Astronomy and Astrophysics

Astronomy

Scientific paper

Polaris is a first-overtone Cepheid with a measured rate of period change that probes real-time evolution of that star. In this work, we compare the measured period change with rates computed from a grid of state-of-the-art stellar evolution models that are consistent with the effective temperature, luminosity and mass of Polaris. We find that the theoretical and measured rates of period change do not agree, and we show this difference implies that Polaris is losing mass at a rate of 10-6 solar masses per year.

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