Determination of stellar shape in microlensing event MOA 2002-BLG-33

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dc.creatorRattenbury, N. J.
dc.creatorAbe, F.
dc.creatorBennett, D. P.
dc.creatorBond, I. A.
dc.creatorCalitz, J. J.
dc.creatorClaret, A.
dc.creatorCook, K. H.
dc.creatorFuruta, Y.
dc.creatorGal-Yam, A.
dc.creatorGlicenstein, J-F.
dc.creatorHearnshaw, J. B.
dc.creatorHauschildt, P. H.
dc.creatorKilmartin, P. M.
dc.creatorKurata, Y.
dc.creatorMasuda, K.
dc.creatorMaoz, D.
dc.creatorMatsubara, Y.
dc.creatorMeintjes, P. J.
dc.creatorMoniez, M.
dc.creatorMuraki, Y.
dc.creatorNoda, S.
dc.creatorOfek, E. O.
dc.creatorOkajima, K.
dc.creatorPhilpott, L.
dc.creatorRhie, S. H.
dc.creatorSako, T.
dc.creatorSullivan, D. J.
dc.creatorSumi, T.
dc.creatorTerndrup, D. M.
dc.creatorTristram, P. J.
dc.creatorWood, J.
dc.creatorYanagisawa, T.
dc.creatorYock, P. C. M.
dc.date2005-06-01
dc.date.accessioned2026-07-07T02:17:53Z
dc.date.available2026-07-07T02:17:53Z
dc.descriptionWe report a measurement of the shape of the source star in microlensing event MOA 2002-BLG-33. The lens for this event was a close binary whose centre-of-mass passed almost directly in front of the source star. At this time, the source star was closely bounded on all sides by a caustic of the lens. This allowed the oblateness of the source star to be constrained. We found that a/b = 1.02^{+0.04}_{-0.02} where a and b are its semi-major and semi-minor axes respectively. The angular resolution of this measurement is approximately 0.04 microarcsec. We also report HST images of the event that confirm a previous identification of the source star as an F8-G2 turn-off main-sequence star.
dc.description8 pages, 5 figures, Accepted by A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0506013
dc.identifierhttp://arxiv.org/abs/astro-ph/0506013
dc.identifierdoi:10.1051/0004-6361:20052858
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/9284
dc.subjectAstrophysics
dc.titleDetermination of stellar shape in microlensing event MOA 2002-BLG-33
dc.typetext

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