Detailed analysis of cool stars

We present the detailed analysis of fourteen cool stars, nine of which have been associated by Eggen with four moving groups from the kinematics and the photometric properties; the five remaining stars are characterized by a large-spatial velocity. From the scatter of the chemical composition among the program stars belonging to a same group, we discuss that the moving groups Her, Wolf 630, and Kapteyn could really exist, and that Groombridge 1830 do not. No peculiar abundance relative to iron is found except a possible relative overabundance of Ni for the most metal-poor stars in this sample. The results of the detailed analyses are discussed in terms of the chemical abundances of our Galaxy.Based on observations collected at European Southern Observatory, La Silla, Chile and Observatoire de Haute-Provence, France.