Long scale activity cyclees in V889 Her
Abstract
For G2 V star V889 Her (young solar analogue, variable of type BY Draconis), long-term periodic changes in the brightness of the star are investigated. From the analysis of the power spectrum of the variability of the star's brightness activity cyclees of 7.15 years, 12.5 years, and about 35 years have been established. Together with the data for the previously studied stars FK Com, UX Ari, Sun and literary sources an analysis of the log(1/P rot ) - log(P cycle /P rot ) diagram has been carried out. Indications that the data characterizing activity cycles in log(P rot ) - log(P cycle /P rot ) diagram are structured have been obtained. The results are consistent with the previously made conclusions about the absence of a log(1/P rot ) - log(P cycle ) correlation.
- Publication:
-
INASAN Science Reports
- Pub Date:
- October 2019
- DOI:
- 10.26087/INASAN.2019.3.1.027
- Bibcode:
- 2019INASR...3..173S