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Contemporaneous Imaging Comparisons of the Spotted Giant sigma Geminorum Using Interferometric, Spectroscopic, and Photometric Data
Stockholm University, Faculty of Science, Department of Astronomy. University of Michigan, USA.ORCID iD: 0000-0002-9288-3482
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Number of Authors: 11
2017 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 849, no 2, 120Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2017. Vol. 849, no 2, 120
Keyword [en]
binaries: close, stars: activity, stars: imaging, stars: individual (sigma Geminorum), stars: variables: general
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-149817DOI: 10.3847/1538-4357/aa8ef7ISI: 000414725900016OAI: oai:DiVA.org:su-149817DiVA: diva2:1167934
Available from: 2017-12-19 Created: 2017-12-19 Last updated: 2017-12-19Bibliographically approved

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Roettenbacher, Rachael M.Monnier, John D.Hackman, ThomasWeber, Michael
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