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4 results on '"Kubiak, Marcin"'

3. Potential direct single-star mass measurement

Author

Ghosh, H., DePoy, D. L., Gal-Yam, A., Gaudi, B. S., Gould, A., Han, C., Lipkin, Y., Maoz, D., Ofek, E. O., Park, B. G., Pogge, R. W., Salim, S., Abe, Fumio, Bennett, David P., Bond, I. A., Eguchi, S., Furuta, Y., Hearnshaw, John B., Kamiya, K., Kilmartin, Pam M., Kurata, Y., Masuda, Kimiaki, Matsubara, Yutaka, Muraki, Y., Noda, S., Okajima, K., Rattenbury, N. J., Sako, T., Sekiguchi, T., Sullivan, D. J., Sumi, T., Tristram, P. J., Yanagisawa, T., Yock, P. C. M., Udalski, A., Soszynski, I., Wyrzykowski, X., Kubiak, Marcin, Szymanski, M. K., Pietrzynski, G., Szewczyk, O., and Zebru

Subjects
Institut für Physik und Astronomie, Astrophysics::Earth and Planetary Astrophysics
Abstract

We analyze the light curve of the microlensing event OGLE-2003-BLG-175/MOA-2003-BLG-45 and show that it has two properties that, when combined with future high-resolution astrometry, could lead to a direct, accurate measurement of the lens mass. First, the light curve shows clear signs of distortion due to the Earth's accelerated motion, which yields a measurement of the projected Einstein radius (r) over tilde (E). Second, from precise astrometric measurements, we show that the blended light in the event is coincident with the microlensed source to within about 15 mas. This argues strongly that this blended light is the lens and hence opens the possibility of directly measuring the lens- source relative proper motion mu(rel) and so the mass M=(c(2)/4G)mu(rel)t(E)(r) over tilde (E), where t(E) is the measured Einstein timescale. While the light-curve-based measurement of (r) over tildeE is, by itself, severely degenerate, we show that this degeneracy can be completely resolved by measuring the direction of proper motion mu(rel)

Published
2004

4. Behind the Scenes of the Discovery of Two Extrasolar Planets: ESO Large Programme 666

Author

Minniti, Dante, Claudio Melo, Naef, Dominique, Udalski, Andrzej, Pont, Frédéric, Moutou, Claire, Santos, Nuno, Queloz, Didier, Mazeh, Tsevi, Gillon, Michel, Mayor, Michel, Udry, Stephane, Diaz, Rodrigo, Hoyer, Sergio, Ramirez, Sebastian, Pietrzynski, Grzegorz, Gieren, Wolfgang, Ruiz, Maria Teresa, Zoccali, Manuela, Tamuz, Omer, Shporer, Abi, Kubiak, Marcin, Soszynski, Igor, Szewczyk, Olaf, Szymanski, Michal, Ulaczyk, Krzysztof, and Wyrzykowski, Lukasz

Subjects
Astronomía, Ciencias Físicas, CIENCIAS NATURALES Y EXACTAS
Abstract

This is the story of the Large Programme 666, dedicated to discover sub-stellar objects (extrasolar planets and brown dwarfs), and to measure their masses, radii, and mean densities. We hunt selected OGLE transit candidates using spectroscopy and photometry in the ‘twilight zone’, stretching the limits of what is nowadays possible with the VLT. Fil: Minniti, Dante. Pontificia Universidad Católica de Chile; Chile Fil: Melo, Claudio. European Southern Observatory; Chile Fil: Naef, Dominique. Fil: Udalski, Andrzej. Warsaw University; Polonia Fil: Pont, Frédéric. Observatoire de Genève; Suiza Fil: Moutou, Claire. Laboratoire d’Astrophysique de Marseille; Francia Fil: Santos, Nuno. Universidad de Porto; Portugal Fil: Queloz, Didier. Universidad de Porto; Portugal Fil: Mazeh, Tsevi. Tel Aviv University; Israel Fil: Gillon, Michel. Observatoire de Genève,; Suiza Fil: Mayor, Michel. Observatoire de Genève,; Suiza Fil: Udry, Stephane. Observatoire de Genève,; Suiza Fil: Diaz, Rodrigo Fernando. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina Fil: Hoyer, Sergio. Universidad de Chile; Chile Fil: Ramírez, Sebastian. Pontificia Universidad Católica de Chile; Chile Fil: Pietrzynski, Grzegorz. Warsaw University Observatory; Polonia Fil: Gieren, Wolfgang. Universidad de Concepción; Chile Fil: Ruíz, María Teresa. Universidad de Chile; Chile Fil: Zoccali, Manuela. Pontificia Universidad Católica de Chile; Chile Fil: Tamuz, Omar. Tel Aviv University; Israel Fil: Shporer, Avi. Tel Aviv University; Israel Fil: Kubiak, Marcin. Warsaw University; Polonia Fil: Soszynski, Igor. Warsaw University; Polonia Fil: Szewczyk, Olaf. Warsaw University; Polonia Fil: Szymanski, Michal. Warsaw University; Polonia Fil: Ulaczyk, Krzysztof. Warsaw University; Polonia Fil: Wyrzykowski, Lukasz. University of Cambridge; Reino Unido

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