For about 100 years the amplitude of the 4-day pulsation in Polaris has decreased. We present new results showing a significant increase in the amplitude based on 4.5 years of continuous monitoring from the ground and with two satellite missions.
Cite
@article{arxiv.0810.4371,
title = {Welcome back, Polaris the Cepheid},
author = {H. Bruntt and A. J. Penny and D. Stello and N. R. Evans and J. A. Eaton},
journal= {arXiv preprint arXiv:0810.4371},
year = {2009}
}
Comments
5 pages; to appear in the proceedings of the "Cool Stars 15" workshop held at St Andrews, UK