Implications of M dwarf Metallicities: The Mass-Luminosity Relationship and Planetary Companions.

Details Implications of M dwarf Metallicities: The Mass-Luminosity Relationship and Planetary Companions. Implications of M dwarf Metallicities: The Mass-Luminosity Relationship and Planetary Companions.

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.9306b&link_type=abstract

American Astronomical Society Meeting 203, #93.06; Bulletin of the American Astronomical Society, Vol. 35, p.1358

Astronomy and Astrophysics

Astrophysics

Scientific paper

In our galaxy, M dwarfs are the most abundant stellar objects. They make up over 70% of stars in number and contribute over 40% of the total stellar mass content (Henry et al. 1998). Despite these overwhelming numbers, M dwarfs remain one of the least understood stellar types due to a lack of empirical data concerning their basic parameters, particularly metallicities. Our research is focused on determining M dwarf metallicities because of their importance in answering two important astrophysical questions: How does varying metallicity affect the luminosity of M dwarfs; and, is there any correlation between the frequency of the presence of planetary mass compansions around M dwarfs and the host star's metallicity? Here we first describe spectral synthesis as a technique for determining M dwarf metallicities. We also present our plan for assessing the systematic errors inherent to this technique and discuss preliminary results. Fianlly, we present our plan to measure the metallicities of M dwarfs with accurately determined masses and M dwarfs on planet detection programs.

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