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Activity of Selected Solar Twins

Shlyapnikov, A. A.; Katsova, M. M.; Nizamov, B. A.

We analyze various tracers of magnetic activity for 23 solar twins which are characterized by significant scatter of lithium abundance in their atmospheres. A level of coronal and chromospheric activity has been studied from available X-ray and UV-archival data. It gives us a chance to compare coronae of solar twins of various ages with the solar …