Binary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit Predictions

We present the first example of binary microlensing for which the parameter measurements can be verified (or contradicted) by future Doppler observations. This test is made possible by a confluence of two relatively unusual circumstances. First, the binary lens is bright enough (I=15.6) to permit Do...

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Autores: Skowron, J., Pietrzynski, G.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2011
País:Chile
Idioma:inglés
OAI Identifier:oai:repositorio.anid.cl:10533/237384
Acceso en línea:https://hdl.handle.net/10533/237384
Access Level:acceso abierto
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spelling Pietrzynski, G.Skowron, J.201110.1088/0004-637X/738/1/87https://hdl.handle.net/10533/237384http://purl.org/coar/access_right/c_abf2Binary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit PredictionsSkowron, J.Pietrzynski, G.2019-12-18T18:15:22Z2022-07-07T23:40:19Z2019-12-18T18:15:22Z2022-07-07T23:40:19Z2011We present the first example of binary microlensing for which the parameter measurements can be verified (or contradicted) by future Doppler observations. This test is made possible by a confluence of two relatively unusual circumstances. First, the binary lens is bright enough (I=15.6) to permit Doppler measurements. Second, we measure not only the usual 7 binary-lens parameters, but also the 'microlens parallax' (which yields the binary mass) and two components of the instantaneous orbital velocity. Thus we measure, effectively, 6 'Kepler+1' parameters (two instantaneous positions, two instantaneous velocities, the binary total mass, and the mass ratio). Since Doppler observations of the brighter binary component determine 5 Kepler parameters (period, velocity amplitude, eccentricity, phase, and position of periapsis), while the same spectroscopy yields the mass of the primary, the combined Doppler + microlensing observations would be overconstrained by 6 + (5 + 1) - (7 + 1) = 4 degrees of freedom. This makes possible an extremely strong test of the microlensing solution. We also introduce a uniform microlensing notation for single and binary lenses, we define conventions, summarize all known microlensing degeneracies and extend a set of parameters to describe full Keplerian motion of the binary lenses.FONDAPFONDAP1501000315010003virtual::47956-1WOS:000294015500087https://hdl.handle.net/10533/237384enginstname: Conicytreponame: Repositorio Digital RI2.010.1088/0004-637X/738/1/87info:eu-repo/grantAgreement/Fondap/15010003https://arxiv.org/abs/1101.3312Atribución-NoComercial-SinDerivadas 3.0 Chilehttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/info:eu-repo/semantics/openAccessBinary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit PredictionsAstrophysical JournalArticuloinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttps://hdl.handle.net/10533/237384http://purl.org/coar/resource_type/c_2df8fbb1045fc0e1-ef55-4532-8afe-69fe789d964dvirtual::47956-1045fc0e1-ef55-4532-8afe-69fe789d964dvirtual::47956-110533/237384oai:repositorio.anid.cl:10533/2373842023-07-24 18:28:47.164https://repositorio.anid.clRepositorio ANIDaletelier@anid.cl
dc.title.none.fl_str_mv Binary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit Predictions
dc.title.journal.none.fl_str_mv Astrophysical Journal
title Binary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit Predictions
spellingShingle Binary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit Predictions
Skowron, J.
title_short Binary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit Predictions
title_full Binary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit Predictions
title_fullStr Binary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit Predictions
title_full_unstemmed Binary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit Predictions
title_sort Binary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit Predictions
dc.creator.none.fl_str_mv Skowron, J.
Pietrzynski, G.
author Skowron, J.
author_facet Skowron, J.
Pietrzynski, G.
author_role author
author2 Pietrzynski, G.
author2_role author
description We present the first example of binary microlensing for which the parameter measurements can be verified (or contradicted) by future Doppler observations. This test is made possible by a confluence of two relatively unusual circumstances. First, the binary lens is bright enough (I=15.6) to permit Doppler measurements. Second, we measure not only the usual 7 binary-lens parameters, but also the 'microlens parallax' (which yields the binary mass) and two components of the instantaneous orbital velocity. Thus we measure, effectively, 6 'Kepler+1' parameters (two instantaneous positions, two instantaneous velocities, the binary total mass, and the mass ratio). Since Doppler observations of the brighter binary component determine 5 Kepler parameters (period, velocity amplitude, eccentricity, phase, and position of periapsis), while the same spectroscopy yields the mass of the primary, the combined Doppler + microlensing observations would be overconstrained by 6 + (5 + 1) - (7 + 1) = 4 degrees of freedom. This makes possible an extremely strong test of the microlensing solution. We also introduce a uniform microlensing notation for single and binary lenses, we define conventions, summarize all known microlensing degeneracies and extend a set of parameters to describe full Keplerian motion of the binary lenses.
publishDate 2011
dc.date.issued.none.fl_str_mv 2011
dc.date.accessioned.none.fl_str_mv 2019-12-18T18:15:22Z
2022-07-07T23:40:19Z
dc.date.available.none.fl_str_mv 2019-12-18T18:15:22Z
2022-07-07T23:40:19Z
dc.type.none.fl_str_mv Articulo
dc.type.driver.none.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.idwos.none.fl_str_mv WOS:000294015500087
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/10533/237384
identifier_str_mv 15010003
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dc.language.iso.none.fl_str_mv eng
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dc.relation.none.fl_str_mv instname: Conicyt
reponame: Repositorio Digital RI2.0
dc.relation.doi.none.fl_str_mv 10.1088/0004-637X/738/1/87
dc.relation.projectid.none.fl_str_mv info:eu-repo/grantAgreement/Fondap/15010003
dc.relation.uri.none.fl_str_mv https://arxiv.org/abs/1101.3312
dc.rights.none.fl_str_mv Atribución-NoComercial-SinDerivadas 3.0 Chile
http://creativecommons.org/licenses/by-nc-nd/3.0/cl/
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rights_invalid_str_mv Atribución-NoComercial-SinDerivadas 3.0 Chile
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eu_rights_str_mv openAccess
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