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Tuesday, October 3 2017

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Magnetic fields in low-mass stars reveal their existence by the presence of strong emission in the hot gas of a chromosphere and a corona. The fields are believed to be generated by a dynamo of some kind inside the star. Different stars are expected to have dynamos of different modes. Theory suggests that stars should become completely convective when the mass reaches a certain limit. In this talk, I will report on observations of chromospheres in stars with spectral types K4-M4.