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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Full characterization of binary-lens event OGLE-2002-BLG-069 from PLANET observations
Astronomy and Astrophysics, Volume 435, No. 3, Year 2005
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Description
We analyze the photometric data obtained by PLANET and OGLE on the caustic-crossing binary-lens microlensing event OGLE-2002-BLG-069. Thanks to the excellent photometric and spectroscopic coverage of the event, we are able to constrain the lens model up to the known ambiguity between close and wide binary lenses. The detection of annual parallax in combination with measurements of extended-source effects allows us to determine the mass, distance and velocity of the lens components for the competing models. While the model involving a close binary lens leads to a Bulge-Disc lens scenario with a lens mass of M = (0.51 ± 0.15) Modot; and distance of DL = (2.9 ± 0.4) kpc, the wide binary lens solution requires a rather implausible binary black-hole lens (M ≳126 M⊙). Furthermore we compare current state-of-the-art numerical and empirical models for the surface brightness profile of the source, a G5III Bulge giant. We find that a linear limb-darkening model for the atmosphere of the source star is consistent with the data whereas a PHOENIX atmosphere model assuming LTE and with no free parameter does not match our observations. © ESO 2005.
Authors & Co-Authors
Kubas, Daniel
Germany, Potsdam
Universität Potsdam
Cassan, Arnaud
France, Paris
Institut D’astrophysique de Paris
Beaulieu, Jean Philippe H.
France, Paris
Institut D’astrophysique de Paris
Coutures, Christian
France, Paris
Institut D’astrophysique de Paris
France, Gif-sur-yvette
Cea Saclay
Dominik, Martin
United Kingdom, St Andrews
University of st Andrews
Albrow, Michael D.
New Zealand, Christchurch
University of Canterbury
Brillant, Stéphanie
Chile, Santiago
European Southern Observatory Santiago
Caldwell, John A.R.
United States, Baltimore
Space Telescope Science Institute
Dominis, D.
Germany, Potsdam
Universität Potsdam
Donatowicz, J.
Austria, Vienna
Technische Universität Wien
Fendt, Christian
Germany, Potsdam
Universität Potsdam
Fouqué, Pascal
France, Toulouse
Observatoire Midi-pyrénées
Jörgensen, Uffe Gråe
Denmark, Copenhagen
Niels Bohr Institutet
Greenhill, John G.
Australia, Hobart
University of Tasmania
Hill, Kym M.
Australia, Hobart
University of Tasmania
Heinmüller, J.
Germany, Potsdam
Universität Potsdam
Hörne, Keith D.
United Kingdom, St Andrews
University of st Andrews
Kane, Stephen R.
United Kingdom, St Andrews
University of st Andrews
Marquette, Jean Baptiste
France, Paris
Institut D’astrophysique de Paris
Martin, Ralph
Australia, Hobart
University of Tasmania
Menzies, John W.
South Africa, Cape Town
South African Astronomical Observatory
Pollard, Karen R.
New Zealand, Christchurch
University of Canterbury
Sahu, Kailash C.
United States, Baltimore
Space Telescope Science Institute
Vinter, C.
Denmark, Copenhagen
Niels Bohr Institutet
Wambsganss, Joachim
Germany, Heidelberg
Astronomisches Rechen-institut
Watson, Robert D.
Australia, Hobart
University of Tasmania
Williams, Andrew J.
Australia, Bickley
Perth Observatory
Thurl, C.
Australia, Canberra
Rsaa
Statistics
Citations: 28
Authors: 28
Affiliations: 15
Identifiers
Doi:
10.1051/0004-6361:20042624
ISSN:
00046361
Research Areas
Health System And Policy