Table 3: Stellar parameters measured on the primaries. [Fe/H] applies for both components.
Primary Secondary Stellar parameters measured on the primaries

Gliese/NLTT HD $T_{\rm eff}$ log(g) v_t [Fe/H]

GJ 1021 4391 CD-48 176B 5967 $\pm$ 70 4.74 $\pm$ 0.14 1.39 $\pm$ 0.17 -0.08 $\pm$ 0.09

Gl 34 A 4614 Gl 34 B 5895 $\pm$ 68 4.43 $\pm$ 0.13 1.37 $\pm$ 0.22 -0.31 $\pm$ 0.09

Gl 53.1A 6660 Gl 53.1 B 4705 $\pm$ 131 4.33 $\pm$ 0.26 0.76 $\pm$ 0.25 +0.07 $\pm$ 0.12

Gl 81.1 A 11964 Gl 81.1 B 5311 $\pm$ 42 3.97 $\pm$ 0.08 0.86 $\pm$ 0.05 +0.09 $\pm$ 0.06

Gl 105 A 16160 Gl 105 B 4846 $\pm$ 65 4.29 $\pm$ 0.13 0.81 $\pm$ 0.10 -0.19 $\pm$ 0.07

Gl 107 A 16895 Gl 107 B 6328 $\pm$ 86 4.43 $\pm$ 0.17 1.73 $\pm$ 0.31 -0.03 $\pm$ 0.09

GJ 3194 A 18757 GJ 3195 B 5681 $\pm$ 34 4.49 $\pm$ 0.06 1.01 $\pm$ 0.07 -0.31 $\pm$ 0.04

Gl 166 A 26965 Gl 166 C 5125 $\pm$ 56 4.43 $\pm$ 0.11 0.30 $\pm$ 0.15 -0.33 $\pm$ 0.06

Gl 211 37394 Gl 212 5293 $\pm$ 109 4.50 $\pm$ 0.21 0.79 $\pm$ 0.17 +0.04 $\pm$ 0.11

Gl 231.1 A 43587 Gl 231.1 B 5946 $\pm$ 32 4.38 $\pm$ 0.06 1.15 $\pm$ 0.06 -0.02 $\pm$ 0.04

Gl 250 A 50281 Gl 250 B 4670 $\pm$ 80 4.41 $\pm$ 0.16 0.70 $\pm$ 0.19 -0.15 $\pm$ 0.09

Gl 297.2 A 68146 Gl 297.2 B 6280 $\pm$ 106 4.46 $\pm$ 0.21 1.81 $\pm$ 0.26 -0.09 $\pm$ 0.09

Gl 324 A 75732 Gl 324 B 5283 $\pm$ 59 4.36 $\pm$ 0.11 0.87 $\pm$ 0.08 +0.32 $\pm$ 0.07

Gl 505 A 115404 Gl 505 B 4983 $\pm$ 48 4.41 $\pm$ 0.09 0.84 $\pm$ 0.07 -0.25 $\pm$ 0.05

Gl 544 A 125455 Gl 544 B 5271 $\pm$ 189 4.85 $\pm$ 0.37 0.87 $\pm$ 0.36 -0.20 $\pm$ 0.19

NLTT 45789 164595 NLTT 45791 5696 $\pm$ 41 4.36 $\pm$ 0.08 0.83 $\pm$ 0.06 -0.07 $\pm$ 0.05

Gl 768.1 A 187691 Gl 768.1 B 6248 $\pm$ 93 4.63 $\pm$ 0.18 2.36 $\pm$ 0.48 +0.07 $\pm$ 0.12

Gl 783.2 A 191785 Gl 783.2 B 5094 $\pm$ 66 4.31 $\pm$ 0.13 0.30 $\pm$ 0.19 -0.16 $\pm$ 0.08

Gl 797 A 197076 A Gl 797 B 5889 $\pm$ 32 4.59 $\pm$ 0.06 1.01 $\pm$ 0.06 -0.07 $\pm$ 0.04

Gl 806.1 A 197989 Gl 806.1 B 4911 $\pm$ 85 2.98 $\pm$ 0.17 1.61 $\pm$ 0.08 -0.05 $\pm$ 0.13

Gl 872 A 215648 Gl 872 B 6156 $\pm$ 99 4.09 $\pm$ 0.19 4.05 $\pm$ 2.01 -0.36 $\pm$ 0.11

**Table 3:** Stellar parameters measured on the primaries. [Fe/H] applies for both components.
Primary	Secondary	Stellar parameters measured on the primaries
Gliese/NLTT	HD		$T_{\rm eff}$	log(g)	v_t	[Fe/H]
GJ 1021	4391	CD-48 176B	5967 $\pm$ 70	4.74 $\pm$ 0.14	1.39 $\pm$ 0.17	-0.08 $\pm$ 0.09
Gl 34 A	4614	Gl 34 B	5895 $\pm$ 68	4.43 $\pm$ 0.13	1.37 $\pm$ 0.22	-0.31 $\pm$ 0.09
Gl 53.1A	6660	Gl 53.1 B	4705 $\pm$ 131	4.33 $\pm$ 0.26	0.76 $\pm$ 0.25	+0.07 $\pm$ 0.12
Gl 81.1 A	11964	Gl 81.1 B	5311 $\pm$ 42	3.97 $\pm$ 0.08	0.86 $\pm$ 0.05	+0.09 $\pm$ 0.06
Gl 105 A	16160	Gl 105 B	4846 $\pm$ 65	4.29 $\pm$ 0.13	0.81 $\pm$ 0.10	-0.19 $\pm$ 0.07
Gl 107 A	16895	Gl 107 B	6328 $\pm$ 86	4.43 $\pm$ 0.17	1.73 $\pm$ 0.31	-0.03 $\pm$ 0.09
GJ 3194 A	18757	GJ 3195 B	5681 $\pm$ 34	4.49 $\pm$ 0.06	1.01 $\pm$ 0.07	-0.31 $\pm$ 0.04
Gl 166 A	26965	Gl 166 C	5125 $\pm$ 56	4.43 $\pm$ 0.11	0.30 $\pm$ 0.15	-0.33 $\pm$ 0.06
Gl 211	37394	Gl 212	5293 $\pm$ 109	4.50 $\pm$ 0.21	0.79 $\pm$ 0.17	+0.04 $\pm$ 0.11
Gl 231.1 A	43587	Gl 231.1 B	5946 $\pm$ 32	4.38 $\pm$ 0.06	1.15 $\pm$ 0.06	-0.02 $\pm$ 0.04
Gl 250 A	50281	Gl 250 B	4670 $\pm$ 80	4.41 $\pm$ 0.16	0.70 $\pm$ 0.19	-0.15 $\pm$ 0.09
Gl 297.2 A	68146	Gl 297.2 B	6280 $\pm$ 106	4.46 $\pm$ 0.21	1.81 $\pm$ 0.26	-0.09 $\pm$ 0.09
Gl 324 A	75732	Gl 324 B	5283 $\pm$ 59	4.36 $\pm$ 0.11	0.87 $\pm$ 0.08	+0.32 $\pm$ 0.07
Gl 505 A	115404	Gl 505 B	4983 $\pm$ 48	4.41 $\pm$ 0.09	0.84 $\pm$ 0.07	-0.25 $\pm$ 0.05
Gl 544 A	125455	Gl 544 B	5271 $\pm$ 189	4.85 $\pm$ 0.37	0.87 $\pm$ 0.36	-0.20 $\pm$ 0.19
NLTT 45789	164595	NLTT 45791	5696 $\pm$ 41	4.36 $\pm$ 0.08	0.83 $\pm$ 0.06	-0.07 $\pm$ 0.05
Gl 768.1 A	187691	Gl 768.1 B	6248 $\pm$ 93	4.63 $\pm$ 0.18	2.36 $\pm$ 0.48	+0.07 $\pm$ 0.12
Gl 783.2 A	191785	Gl 783.2 B	5094 $\pm$ 66	4.31 $\pm$ 0.13	0.30 $\pm$ 0.19	-0.16 $\pm$ 0.08
Gl 797 A	197076 A	Gl 797 B	5889 $\pm$ 32	4.59 $\pm$ 0.06	1.01 $\pm$ 0.06	-0.07 $\pm$ 0.04
Gl 806.1 A	197989	Gl 806.1 B	4911 $\pm$ 85	2.98 $\pm$ 0.17	1.61 $\pm$ 0.08	-0.05 $\pm$ 0.13
Gl 872 A	215648	Gl 872 B	6156 $\pm$ 99	4.09 $\pm$ 0.19	4.05 $\pm$ 2.01	-0.36 $\pm$ 0.11

Source LaTeX | All tables | In the text

	1 Introduction
	2 Previous metallicity estimates of M dwarfs
	3 Observations and analysis
	4 A photometric calibration of M-dwarf metallicities
	5 The V-band mass-luminosity relation
	6 Metallicity of M-dwarf planet-host stars
	7 Metallicity distribution of M dwarfs
	8 Conclusions
	References
	Online Material