First microlens mass measurement: PLANET photometry of EROS BLG-2000-5

Simple item page
dc.creatorAn, Jin H.
dc.creatorAlbrow, M. D.
dc.creatorBeaulieu, J. -P.
dc.creatorCaldwell, J. A. R.
dc.creatorDePoy, D. L.
dc.creatorDominik, M.
dc.creatorGaudi, B. S.
dc.creatorGould, A.
dc.creatorGreenhill, J.
dc.creatorHill, K.
dc.creatorKane, S.
dc.creatorMartin, R.
dc.creatorMenzies, J.
dc.creatorPogge, R. W.
dc.creatorPollard, K. R.
dc.creatorSackett, P. D.
dc.creatorSahu, K. C.
dc.creatorVermaak, P.
dc.creatorWatson, R.
dc.creatorWilliams, A.
dc.date2001-10-03
dc.date2002-03-01
dc.date.accessioned2026-07-07T11:08:01Z
dc.date.available2026-07-07T11:08:01Z
dc.descriptionWe analyze PLANET photometric observations of the caustic-crossing binary-lens microlensing event, EROS BLG-2000-5, and find that modeling the observed light curve requires incorporation of the microlens parallax and the binary orbital motion. The projected Einstein radius (~r_E = 3.61 +/- 0.11 AU) is derived from the measurement of the microlens parallax, and we are also able to infer the angular Einstein radius (theta_E = 1.38 +/- 0.12 mas) from the finite source effect on the light curve, combined with an estimate of the angular size of the source given by the source position in a color-magnitude diagram. The lens mass, M = 0.612 +/- 0.057 M_sun, is found by combining these two quantities. This is the first time that parallax effects are detected for a caustic-crossing event and also the first time that the lens mass degeneracy has been completely broken through photometric monitoring alone. The combination of the projected Einstein radius and the angular Einstein radius also allows us to conclude that the lens lies in the near side of the disk, within 2.6 kpc of the Sun, while the radial velocity measurement indicates that the source is a Galactic bulge giant.
dc.descriptionrevised version incorporating new radial velocity information including 12 figures and 5 tables, to appear in the Astrophysical Journal (2002 June 10), Data available at http://www.astro.rug.nl/~planet/planetpapers.html
dc.identifierhttps://arxiv.org/abs/astro-ph/0110095
dc.identifierhttp://arxiv.org/abs/astro-ph/0110095
dc.identifierAstrophys.J.572:521-539,2002
dc.identifierdoi:10.1086/340191
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/189999
dc.subjectAstrophysics
dc.titleFirst microlens mass measurement: PLANET photometry of EROS BLG-2000-5
dc.typetext

Files

Collections

arXiv