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

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Roettenbacher , R M , Monnier , J D , Korhonen , H , Harmon , R O , Baron , F , Hackman , T , Henry , G W , Schaefer , G H , Strassmeier , K G , Weber , M & ten Brummelaar , T A 2017 , ' Contemporaneous Imaging Comparisons of the Spotted Giant sigma Geminorum Using Interferometric, Spectroscopic, and Photometric Data ' , Astrophysical Journal , vol. 849 , no. 2 , 120 . https://doi.org/10.3847/1538-4357/aa8ef7

Title: Contemporaneous Imaging Comparisons of the Spotted Giant sigma Geminorum Using Interferometric, Spectroscopic, and Photometric Data
Author: 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; ten Brummelaar, Theo A.
Contributor organization: Department of Physics
Date: 2017-11-10
Language: eng
Number of pages: 16
Belongs to series: Astrophysical Journal
ISSN: 0004-637X
DOI: https://doi.org/10.3847/1538-4357/aa8ef7
URI: http://hdl.handle.net/10138/309175
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 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.
Subject: binaries: close
stars: activity
stars: imaging
stars: individual (sigma Geminorum)
stars: variables: general
LINE-DATA-BASE
STELLAR SURFACES
CHARA ARRAY
STARS
ANDROMEDAE
ROTATION
CYCLES
TESTS
115 Astronomy, Space science
Peer reviewed: Yes
Rights: unspecified
Usage restriction: openAccess
Self-archived version: publishedVersion


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