Magnetic activity of interacting binaries. Issue Volume 12:Issue S328(2016) (12th September 2017)

• Record Type: Journal Article
• Authors: Hill, Colin A.
• Editors: Nandy, D.; Valio, A.; Petit, P.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 12:Issue S328(2016)
• Page Start: 54
• Page End: 60
• Publication Date: 2017-09-12
• Subjects: stars: novae, -- cataclysmic variables, -- stars: activity, -- stars: spots, -- stars: imaging, -- stars: magnetic fields, -- stars: binaries (including multiple): close, -- techniques: spectroscopic; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921317004112
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: Interacting binaries provide unique parameter regimes, both rapid rotation and tidal distortion, in which to test stellar dynamo theories and study the resulting magnetic activity. Close binaries such as cataclysmic variables (CVs) have been found to differentially rotate, and so can provide testbeds for tidal dissipation efficiency in stellar convective envelopes, with implications for both CV and planet-star evolution. Furthermore, CVs show evidence of preferential emergence of magnetic flux tubes towards the companion star, as well as large, long-lived prominences that form preferentially within the binary geometry. Moreover, RS CVn binaries also show clear magnetic interactions between the two components in the form of coronal X-ray emission. Here, we review several examples of magnetic interactions in different types of close binaries.