On Chromospheric Variations Modeling for Main-Sequence Stars of G and K Spectral Classes

Details On Chromospheric Variations Modeling for Main-Sequence Stars of G and K Spectral Classes On Chromospheric Variations Modeling for Main-Sequence Stars of G and K Spectral Classes

2010-12-22

arxiv.org/abs/1012.5080v1

Astronomical and astrophysical transactions, 2004, v.23, n 2, pp. 165-172

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

8 pages, 2 figures

Scientific paper

We present a method of chromospheric flux simulation for 13 late-type main-sequence stars. These Sun-like stars have well-determined cyclic flux variations similar to 11 yr solar activity cycle. Our flux prediction is based on chromospheric HK emission time series measurements from Mount Wilson Observatory and comparable solar data. We show that solar three - component modeling explains well the stellar observations. We find that the 10 - 20% of K - stars disc surfaces are occupied by bright active regions.

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