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Table 1

Atmospheric parameters of investigated M-dwarfs.

Name Spectral T eff υsini  |Bm (|Bf)
type (K) (km s-1) (kG) (kG)
atoms FeH

Sunspot 4000 0.0 2.7 2.7 2.71
GJ 1002 M 5.5 3100 2.5 0 0
GJ 1224 M 4.5 3200 3.0  ≈2 1.7–2 2.72
YZ Cmi M 4.5 3300 5.0 3–4 3–3.5  >3.92
EV Lac M 3.5 3400 1.0 3–4 3–3.5  ~3.93
AD Leo M 3.5 3400 3.0 2–3 2–2.5  ~2.92

Notes.  |Bm – mean surface magnetic field; (|Bf) – results of previous investigations.

References. (1) Wallace et al. (1998). (2) Reiners & Basri (2007), scaled from (3).(3) Johns-Krull & Valenti (1996).

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