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- W3104367908 abstract "We present a comparison of the predictions of stellar models with the luminosity of the lower main sequence (5.5 < MV < 7.3) using K dwarfs in the Hipparcos catalogue. The parallaxes of our comparison stars are known to better than 15 per cent and metallicities have been recently determined from photometry. A major advantage of our comparison is that distances in our sample are known with good accuracy, while tests that involve open and globular clusters are constrained by potentially inaccurate distances. We show that the luminosity of the lower main sequence is a simple function of metallicity, deriving the relation ΔMV= 0.045 77 − 0.843 75 ×[Fe/H], where ΔMV is the luminosity difference relative to a fiducial, solar metallicity isochrone. We compare the data with a range of isochrones from the literature. None of the isochrone sets fits the data at all metallicities, although some models do clearly better than others. In particular, metal-rich isochrones seem to be difficult to construct." @default.
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- W3104367908 date "2002-10-01" @default.
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- W3104367908 title "Luminosity-metallicity relation for stars on the lower main sequence" @default.
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- W3104367908 doi "https://doi.org/10.1046/j.1365-8711.2002.05690.x" @default.
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