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Low-mass Stars as Tracers of the Milky Way Populations

其他書名	Investigating the Effects of Metallicity in Cool Atmosphere
出版	éditeur inconnu, 2013
URL	http://books.google.com.hk/books?id=tDUBkAEACAAJ&hl=&source=gbs_api

註釋Very Low-Mass stars (M dwarfs) are an important source of information for probing the lowmass end of the main sequence, down to the hydrogen burning limit. They are the dominant stellar component of the Galaxy and make up the majority of baryonic matter in the Galaxy. Moreover, an increasing number of M dwarfs are now known to host exoplanets, including super-Earth exoplanets. The determination of accurate fundamental parameters for M dwarfs has therefore relevant implications for both stellar and Galactic astronomy as well as planetology. Despite their large number in the Galaxy, M dwarfs remain elusive objects and the modelling of their photosphere has long remained a challenge (molecular opacities, dust cloud formation). The description of these stars therefore need a strong empirical basis, or validation. In particular, the effect of metallicity on the physics of cool atmospheres are still poorly known, even for early-type M-dwarfs.[...].