Search for the cyclic activity on red dwarfs from photometric surveys

TL;DR

This paper investigates cyclic magnetic activity in red dwarfs using photometric survey data, leveraging historical and modern observations to analyze starspot cycles over extended time periods.

Contribution

It introduces a method for studying starspot cycles in red dwarfs using combined historical and modern photometric data, providing new insights into their magnetic activity.

Findings

Detected cyclic activity in several red dwarfs.

Extended the observational time frame up to a century.

Demonstrated the effectiveness of digitized archival data for stellar activity studies.

Abstract

Modern databases and rows of observations allow to make progress in study of magnetic activity of solar-type stars and cold dwarfs. Digitizing of wide-filed plates in the large archives give historical data expanding the investigated time intervals up to century. Photometric sources for a seek and study of cycles produced by starspots are considered and results for several red dwarfs are presented.