English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The atmospheric activity of the Sun and solar-type stars is analysedinvolving observations from HK-project at the Mount Wilson Observatory, theCalifornia and Carnegie Planet Search Program at the Keck and LickObservatories, and the Magellan Planet Search Program at the Las CampanasObservatory. We show that for stars of F, G and K spectral classes, the cyclicactivity, similar to the 11-yr Solar cycles, is different: it becomes moreprominent in K-stars. Comparative study of solar-type stars with differentlevels of the chromospheric and coronal activity confirms that the Sun belongsto stars with the low level of the chromospheric activity and stands apartamong these stars by the minimum level of the coronal radiation and minimumflux variations of the photospheric radiation.

Cycles of magnetic activity in solar-type stars. The place of the Sun among the stars with different levels of coronal and chromospheric activity