Contemporaneous Imaging Comparisons of the Spotted Giant $\sigma$ Geminorum Using Interferometric, Spectroscopic, and Photometric Data

Autor:	Roettenbacher, Rachael M., Monnier, John D., Korhonen, Heidi, Harmon, Robert O., Baron, Fabien, Hackman, Thomas, Henry, Gregory W., Schaefer, Gail H., Strassmeier, Klaus G., Weber, Michael, Brummelaar, Theo A. ten
Rok vydání:	2017
Předmět:	Astrophysics - Solar and Stellar Astrophysics
Druh dokumentu:	Working Paper
DOI:	10.3847/1538-4357/aa8ef7
Popis:	Nearby, active stars with relatively rapid rotation and large starspot structures offer the opportunity to compare interferometric, spectroscopic, and photometric imaging techniques. In this paper, we image a spotted star with three different methods for the first time. The giant primary star of the RS Canum Venaticorum binary $\sigma$ Geminorum ($\sigma$ Gem) was imaged for two epochs of interferometric, high-resolution spectroscopic, and photometric observations. The light curves from the reconstructions show good agreement with the observed light curves, supported by the longitudinally-consistent spot features on the different maps. However, there is strong disagreement in the spot latitudes across the methods. Comment: Accepted to ApJ, 19 pages, 16 figures, 5 tables
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1709.10109 Zobrazit plný text záznamu View this record from Arxiv