Activity cycles in RS CVn type stars

• Main Authors: Martínez, C. I, Mauas, P. J. D, Buccino, A. P
• Format: Journal Article
• Language: English
• Published: 10-11-2021
• Subjects: Physics - Solar and Stellar Astrophysics
• DOI: 10.48550/arxiv.2111.05911

We compile a list of 121 RS CVn type stars from the bibliography in southern
hemisphere, to search for activity cycles, covering a large range of
luminosities and rotation periods. For each system of the list, we obtain
photometric data from the All Sky Automated Survey (ASAS), and we complement it
with our own photometry, obtained with the Optical Robotic Observatory (ORO).
We analyze this data with the Generalized Lomb-Scargle periodogram to determine
the rotation period and possible activity cycles for each system. We found
rotation periods for 102 systems and activity cycles for 91 systems. From the
statistical analysis of the results, we found that giant stars behave
differently than subgiants and main-sequence stars, and that there is a good
correlation between rotation periods and luminosities.