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Table 2
Magnetic field measurements in M dwarfs.
| Name | T eff | α(Fe) | υsini | ⟨ Bs ⟩ a | σ b | Bf (RB07)c | B max d | ||
| K | dex | km s-1 | kG | % | kG | kG | |||
| RC | MC | RC | MC | ||||||
|
|
|||||||||
| GJ 388 | 3500 | −4.46 | 2.9 | 2.8 | 2.9 | 1.69 | 1.92 | 2.9 ± 0.2 | 7.0 |
| 3400 | −4.64 | 3.0 | 2.9 | 2.9 | 1.48 | 1.53 | 6.5 | ||
| 3300 | −4.73 | 2.7 | 2.7 | 2.8 | 1.64 | 1.81 | 7.0 | ||
|
|
|||||||||
| GJ 729 | 3500 | −4.30 | 4.4 | 2.4 | 2.3 | 1.72 | 1.68 | 2.2 ± 0.1 | 5.5 |
| 3400 | −4.40 | 4.0 | 2.3 | 2.1 | 1.66 | 1.74 | 6.0 | ||
| 3300 | −4.54 | 4.0 | 2.2 | 1.9 | 1.67 | 1.75 | 6.0 | ||
|
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| GJ 285 | 3400 | −4.22 | 6.2 | 3.6 | 3.4 | 2.03 | 2.11 | >3.9 | 7.5 |
| 3300 | −4.37 | 6.0 | 3.6 | 3.4 | 2.00 | 2.10 | 7.5 | ||
| 3200 | −4.57 | 6.2 | 3.5 | 3.6 | 1.95 | 1.97 | 7.0 | ||
|
|
|||||||||
| GJ 406 | 3200 | −3.80 | 3.0 | 2.3 | 2.0 | 4.03 | 4.36 | 2.4 ± 0.1 | 7.0 |
| 3100 | −4.08 | 3.0 | 2.6 | 2.3 | 3.94 | 3.87 | 6.5 | ||
| 3000 | −4.26 | 1.0 | 2.2 | 2.0 | 4.10 | 4.36 | 6.5 | ||
|
|
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| GJ 1002 | 3100 | −4.37 | 2.4 | <0.1 | 1.05 | 0.0 | 1.0 | ||
| 3100 | −4.47 | 1.9 | <0.02 | 0.98 | 0.5 | ||||
Notes.
(a)
Mean magnetic field derived assuming magnetic field models with dominating radial (RC) and meridional (MC) components;
(b)
deviation between observed and predicted profiles of FeH lines computed using Eq. (3);
(c)
values are from Reiners & Basri (2007);
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