Solar and Solar-type Stars Atmosphere's Activity at 11-year and Quasi-biennial Time Scales

2011/02/19 by Е. А. Бруевич, Bruevich, E. A., É. V. Kononovich +1 · 2 citations
Physics and Astronomy · #Astro and Planetary Science #FOS: Physical sciences #Solar and Space Plasma Dynamics #Solar and Stellar Astrophysics (astro-ph.SR) #Stellar, planetary, and galactic studies

paper · pdf · doi:10.48550/arxiv.1102.3976

openalex publication_date 2011/02/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We studied new simultaneous observations of the flux variations of the photospheric and chromospheric emissions of 33 solar-type stars and Sun during the HK-project that were conducted over the past 20 years. In addition to the known cyclic chromospheric emission variations of stars at the 11-year time scale, which were discovered at the Mount Wilson Observatory, we found a recurrences that are similar to the quasi-biennial variations of solar radiation. The results of calculations of the radiation fluxes variations periods of stars at the quasi-biennial scale are given.

Citations

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