High-Precision Limb-Darkening Measurement of a K3 Giant Using Microlensing
Fields, Dale; Albrow, M; An, J.; Beaulieu, J.-P; Caldwell, J A R; DePoy, D; Dominik, M; Gaudi, B S; Gould, A; Greenhill, J; Hill, Kym; Jorgensen, U G; Kane, S; Martin, R; Menzies, J; Pogge, R W; Pollard, K R; Sackett, Penny; Sahu, K C; Vermaak, P; Watson, R; Williams, Andrew; Glicenstein, J F; Hauschildt, Peter H
We obtain high-precision limb-darkening measurements in five bands (V, VE, IE, I, and H) for the K3 III (Teff = 4200 K, [Fe/H] = +0.3, log g = 2.3) source of the Galactic bulge microlensing event EROS BLG-2000-5. These measurements are inconsistent with the predictions of atmospheric models at higher than 10 σ. While the disagreement is present in all bands, it is most apparent in I, IE, and VE, in part because the data are better and in part because the intrinsic disagreement is stronger. We...[Show more]
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