Using Limb-Darkening to Measure the Masses of Red Giants

Details Using Limb-Darkening to Measure the Masses of Red Giants Using Limb-Darkening to Measure the Masses of Red Giants

2010-11-19

arxiv.org/abs/1011.4387v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

2 pages, 1 figure, To appear in the proceedings of Why Galaxies Care About AGB stars II

Scientific paper

We present a novel method for measuring the masses of evolved stars from their limb-darkening observations parameterized as a linear-plus-square-root function with two coefficients. The coefficients of the law are related to integrated moments of the intensity and carry information about the extension of the stellar atmosphere, which is correlated to the ratio of the stellar radius to mass, R/M. Here, we show why the limb-darkening law is related to the R/M, and apply this result to limb-darkening observations of the microlensing event EROS-BLG-2000-5.

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