2003A&A...411L.493A

Query : 2003A&A...411L.493A

2003A&A...411L.493A - Astronomy and Astrophysics, volume 411L493-496 (2003/12-1)

Probing the atmosphere of a solar-like star by galactic microlensing at high magnification.

ABE F., BENNETT D.P., BOND I.A., CALITZ J.J., CLARET A., COOK K.H., FURUTA Y., GAL-YAM A., GLICENSTEIN J.-F., HEARNSHAW J.B., HAUSCHILDT P.H., KENT D., KILMARTIN P.M., KURATA Y., MASUDA K., MAOZ D., MATSUBARA Y., MEINTJES P.J., MONIEZ M., MURAKI Y., NODA S., OFEK E.O., OKAJIMA K., PHILPOTT L., RATTENBURY N.J., RHIE S.H., SAKO T., SULLIVAN D.J., SUMI T., TERNDRUP D.M., TRISTRAM P.J., YANAGISAWA T. and YOCK P.C.M.

Abstract (from CDS):

We report a measurement of limb darkening of a solar-like star in the very high magnification microlensing event MOA 2002-BLG-33. A 15 hour deviation from the light curve profile expected for a single lens was monitored intensively in V and I passbands by five telescopes spanning the globe. Our modelling of the light curve showed the lens to be a close binary system whose centre-of-mass passed almost directly in front of the source star. The source star was identified as an F8-G2 main sequence turn-off star. The measured stellar profiles agree with current stellar atmosphere theory to within ∼4% in two passbands. The effective angular resolution of the measurements is <1µas. These are the first limb darkening measurements obtained by microlensing for a Solar-like star.

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Journal keyword(s): techniques: high angular resolution - techniques: gravitational microlensing - stars: limb darkening - stars: individual: MOA 2002-BLG-33

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 MACHO 97-SMC-1 * 01 00 05.6 -72 15 03   18.01 17.9 18.14   ~ 27 0
2 EROS BLG 2000 5 * 17 53 11.43 -30 55 34.4           K3III 37 0
3 MACHO 97-BLG-41 ** 17 56 20.7 -28 47 42           ~ 58 1
4 MOA 2002-BLG-33 * 17 58 24.60 -29 06 11.3           ~ 15 0
5 OGLE BUL-SC19 26606 * 18 07 45.14 -27 33 15.4           ~ 22 0

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