Magnetic Fields of M-Dwarfs from the Molecular and Atomic Diagnostics

Strong surface magnetic fields are frequently found in the spectra of M-dwarfs, with the mean intensities on the order of a few thousand Gauss - three orders of magnitude higher than the mean surface magnetic field of the Sun. The appearance of such fields in both partially and fully convective M-dwarfs provides strong constraints on the theoretical models of stellar magnetism. The accurate estimates of the magnetic field intensity and geometry in these cool objects, however, is strongly limited to our ability to simulate the Zeeman effect in molecular lines. Here we present the first quantitative results of modelling and analysis of the magnetic fields in selected M-dwarfs in FeH Wing-Ford F\^4Δ-X\^4Δ transitions and some strong atomic lines from polarised radiative transfer.

Reiners, A. (författare)
Wende, S. (författare)
Kochukhov, OlegUppsala universitet,Observationell astrofysik(Swepub:uu)oko28508 (författare)
Piskunov, NikolaiUppsala universitet,Observationell astrofysik(Swepub:uu)nikopisk (författare)
Seifahrt, A. (författare)
Uppsala universitetObservationell astrofysik (creator_code:org_t)

Av författaren/redakt...: Shulyak, D.; Reiners, A.; Wende, S.; Kochukhov, Oleg; Piskunov, Nikola ...; Seifahrt, A.

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