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  Star-spot distributions and chromospheric activity on the RS CVn type eclipsing binary SV Cam

Şenavcı, H. V., Bahar, E., Montes, D., Zola, S., Hussain, G. A. J., Frasca, A., et al. (2018). Star-spot distributions and chromospheric activity on the RS CVn type eclipsing binary SV Cam. Monthly Notices of the Royal Astronomical Society, 479(1), 875-889. doi:10.1093/mnras/sty1469.

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Şenavcı, H V, Author
Bahar, E, Author
Montes, D, Author
Zola, S, Author
Hussain, G A J, Author
Frasca, A, Author
Isik, Emre1, Author              
Yörükoğlu, O, Author
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

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Free keywords: stars: activity, binaries: eclipsing, stars: imaging
 Abstract: Using a time series of high-resolution spectra and high-quality multicolour photometry, we reconstruct surface maps of the primary component of the RS CVn type rapidly rotating eclipsing binary, SV Cam (F9V + K4V). We measure a mass ratio, q, of 0.641(2) using our highest quality spectra and obtain surface brightness maps of the primary component, which exhibit predominantly high-latitude spots located between 60° and 70° latitudes with a mean filling factor of ∼35 per cent. This is also indicated by the R-band light-curve inversion, subjected to rigorous numerical tests. The spectral subtraction of the H α line reveals strong activity of the secondary component. The excess H α absorption detected near the secondary minimum hints to the presence of cool material partially obscuring the primary star. The flux ratios of Caii IRT excess emission indicate that the contribution of chromospheric plage regions associated with star-spots is dominant, even during the passage of the filament-like absorption feature.

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Language(s): eng - English
 Dates: 2018-08-082018
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/sty1469
 Degree: -

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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
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Affiliations:
Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 479 (1) Sequence Number: - Start / End Page: 875 - 889 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150