Problems in modelling low-metallicity F and G stars

Details Problems in modelling low-metallicity F and G stars Problems in modelling low-metallicity F and G stars

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mons.proc...99n&link_type=abstract

The First MONS Workshop: Science with a Small Space Telescope, held in Aarhus, Denmark, June 29 - 30, 1998, Eds.: H. Kjeldsen, T

Physics

3

Scientific paper

It is shown that the Hipparcos parallaxes lead to a very significant misfit between metal-poor F and G stars and isochrones in the M_V - T_eff diagram. The stars are shifted -200 to -300 K relative to the isochrones. Possible explanations of this deviation are discussed, and the importance of measuring oscillation frequencies is emphasized as a way to obtain new independent information on the interior structure of metal-poor stars. Furthermore, the selection of metal-poor stars as targets for the MONS mission is discussed.

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