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| Paper: |
Magnetic Fields in M-dwarfs: Quantitative Results from Detailed
Spectral Synthesis in FeH Lines |
| Volume: |
448, 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun |
| Page: |
1263 |
| Authors: |
Shulyak, D.; Reiners, A.; Wende, S.; Kochukhov, O.; Piskunov, N.; Seifahrt, A. |
| Abstract: |
Strong surface magnetic fields are ubiquitously found in M-dwarfs
with mean intensities on the order of few thousand Gauss — three
orders of magnitude higher than the mean surface magnetic field of
the Sun. These fields and their interaction with photospheric
convection are the main source of stellar activity, which is of big
interest to study links between parent stars and their planets.
Moreover, the understanding of stellar magnetism, as well as the
role of different dynamo-actions in particular, is impossible
without explaining magnetic fields in M-dwarfs. Measuring magnetic
field intensities and geometries in such cool objects, however, is
strongly limited to our ability to simulate the Zeeman effect in
molecular lines. In this work, we present quantitative results of
modelling and analysis of the magnetic fields in selected M-dwarfs
in FeH Wing-Ford lines and strong atomic lines. Some particular FeH
lines are found to be the excellent probes of the magnetic field. |
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