Detecting activity cycles of late-type dwarfs in Kepler data. Issue Volume 9:Issue S302(2013) (7th August 2014)

• Record Type: Journal Article
• Authors: Vida, Krisztián; Oláh, Katalin
• Editors: Petit, Pascal; Jardine, Moira; Spruit, Hendrik C.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 9:Issue S302(2013)
• Page Start: 224
• Page End: 227
• Publication Date: 2014-08-07
• Subjects: stars: activity, -- stars: low-mass, -- stars: magnetic fields, -- stars: rotation, -- stars: spots; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921314002142
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: Using data of fast-rotating active dwarf stars in the Kepler database, we perform time-frequency analysis of the light curves in order to search for signs of activity cycles. We use the phenomenon that the active region latitudes vary with the cycle (like the solar butterfly diagram), which causes the observed rotation period to change as a consequence of differential rotation. We find cycles in 8 cases of the 39 promising targets with periods between of 300–900 days.