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Contemporaneous Imaging Comparisons of the Spotted Giant σ Geminorum Using Interferometric, Spectroscopic, and Photometric Data.

Authors :
Rachael M. Roettenbacher
John D. Monnier
Heidi Korhonen
Robert O. Harmon
Fabien Baron
Thomas Hackman
Gregory W. Henry
Gail H. Schaefer
Klaus G. Strassmeier
Michael Weber
Theo A. ten Brummelaar
Source :
Astrophysical Journal; 11/10/2017, Vol. 849 Issue 2, p1-1, 1p
Publication Year :
2017

Abstract

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 σ Geminorum (σ 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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0004637X
Volume :
849
Issue :
2
Database :
Complementary Index
Journal :
Astrophysical Journal
Publication Type :
Academic Journal
Accession number :
126167838
Full Text :
https://doi.org/10.3847/1538-4357/aa8ef7