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Paper: Stellar Activity and Variability: Our Sun in a Stellar Context
Volume: 478, Fifty Years of Seismology of the Sun and Stars
Page: 365
Authors: Giampapa, M.
Abstract: The variability of the Sun in its chromospheric emission and associated irradiance changes is compared with that of other solar-type stars. A review of the results thus far obtained indicates that the Sun is not atypical in its magnetic field-related variations when compared to relatively homogeneous samples of stars that are also solar-like in key parameters such as effective temperature, gravity, rotation rate, and mean level of activity. In a comparison with more heterogeneous samples of ostensibly solar-type stars, the Sun appears to reside at a boundary between “active” and “quiet” chromosphere stars, suggesting that the structure of the outer solar atmosphere as delineated by emergent magnetic fields includes attributes of each of these broad stellar categories.
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