papers
Publications (3)
astro-ph.SR2009
Multiple and changing cycles of active stars II. Results
K. Oláh, Z. Kolláth, T. Granzer +8
We study the time variations of the cycles of 20 active stars based on decades-long photometric or spectroscopic observations. A method of time-frequency analysis, as discussed in…
astro-ph2007
Patterns of photometric and chromospheric variation among Sun-like stars: A 20-year perspective
G. W. Lockwood, B. A. Skiff, Gregory W. Henry +5
We examine patterns of variation of 32 primarily main sequence stars, extending our previous 7-12 year time series to 13-20 years by combining b, y data from Lowell Observatory wit…
astro-ph.SR2016
Magnetic cycles at different ages of stars
K. Oláh, Zs. KÅvári, K. Petrovay +4
We study the different patterns of interannual magnetic variability in stars on or near the lower main sequence, approximately solar-type (G-K dwarf) stars in time series of 36 yea…