**Table 1:** Observed visual binaries with an M-dwarf secondary.
$\begin{displaymath}\begin{tabular}{ l r@{:}c@{:}lr@{:}c@{:}l l l l r@{:}c@{:}lr@... ...~B &22&46&41.6 &$+$12&10&20 &11.7 &M1\\ \hline \end{tabular}\end{displaymath}$

Source LaTeX | All tables | In the text

Article Contents

	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

	List of tables
	List of figures