Using high-precision photometry from the \textit{Kepler} mission, we investigate patterns of spot activity on the K1-type subgiant component of KIC 11560447, a short-period late-type eclipsing binary. We tested the validity of maximum entropy reconstructions of starspots by numerical simulations. Our procedure successfully captures up to three large spot clusters migrating in longitude. We suggest a way to measure a lower limit for stellar differential rotation, using slopes of spot patterns in the reconstructed time-longitude diagram. We find solar-like differential rotation and recurrent spot activity with a long-term trend towards a dominant axisymmetric spot distribution during the period of observations.
@article{arxiv.1804.10619,
title = {Starspot activity and differential rotation in KIC 11560447},
author = {Emre Isik and Ibrahim Ozavci and Hakan V. Senavci and Gaitee A. J. Hussain and Douglas O'Neal and Mesut Yilmaz and Selim O. Selam},
journal= {arXiv preprint arXiv:1804.10619},
year = {2018}
}
Comments
2 pages, 1 figure, IAU Symposium 340: Long-Term Datasets for the Understanding of Solar and Stellar Magnetic Cycles