Magnetic field observations of low-mass stars

Details Magnetic field observations of low-mass stars Magnetic field observations of low-mass stars

2009-01-13

arxiv.org/abs/0901.1719v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

proceedings of IAU Symp. 259, Cosmic Magnetic Fields; 5 pages

Scientific paper

10.1017/S1743921309030701

Direct measurements of magnetic fields in low-mass stars of spectral class M have become available during the last years. This contribution summarizes the data available on direct magnetic measurements in M dwarfs from Zeeman analysis in integrated and polarized light. Strong magnetic fields at kilo-Gauss strength are found throughout the whole M spectral range, and so far all field M dwarfs of spectral type M6 and later show strong magnetic fields. Zeeman Doppler images from polarized light find weaker fields, which may carry important information on magnetic field generation in partially and fully convective stars.

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