%0 Journal Article
%4 dpi.inpe.br/plutao/2013/05.31.21.04
%2 dpi.inpe.br/plutao/2013/05.31.21.04.15
%@doi 10.1088/2041-8205/762/2/L28
%@issn 2041-8205
%@issn 2041-8213
%F lattes: 5605590098640584 26 HanAUCYGCTSKSPPUPKSWABDDDGHJJLKMMNNPPPS:2013:OGCPA
%T The second multiple-planet system discovered by microlensing: OGLE-2012-BLG-0026Lb, c—A pair of jovian planets beyond the snow line
%D 2013
%9 journal article
%A Han, C.,
%A Udalski, A.,
%A Choi, J. -Y.,
%A Yee, J. C.,
%A Gould, A.,
%A Christie, G.,
%A Tan, T. -G.,
%A Szymanski, M. K.,
%A Kubiak, M.,
%A Soszynski, I.,
%A Pietrzy ski, G.,
%A Poleski, R.,
%A Ulaczyk, K.,
%A Pietrukowicz, P.,
%A Kozowski, S.,
%A Skowron, J.,
%A Wyrzykowski, L.,
%A Almeida, Leonardo Andrade de,
%A Batista, V.,
%A Depoy, D. L.,
%A Dong, S.,
%A Drummond, J.,
%A Gaudi, B. S.,
%A Hwang, K. -H,
%A Jablonski, Francisco Jose,
%A Jung, Y. -K.,
%A Lee, C. -U.,
%A Koo, J. -R.,
%A McCormick, J.,
%A Monard, L. A. G.,
%A Natusch, T.,
%A Ngan, H.,
%A Park, H.,
%A Pogge, R. W.,
%A Porritt, Ian,
%A Shin, I. -G.,
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%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
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%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Chungbuk Natl Univ, Inst Astrophys, Dept Phys, Cheongju 371763, South Korea.
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%@electronicmailaddress leonardodealmeida.andrade@gmail.com
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%@electronicmailaddress chico@das.inpe.br
%B Astrophysical Journal Letters
%V 762
%N 2
%P L28
%K gravitational lensing, planetary systems, snow line.
%X We report the discovery of a planetary system from observation of the high-magnification microlensing event OGLE-2012-BLG-0026. The lensing light curve exhibits a complex central perturbation with multiple features. We find that the perturbation was produced by two planets located near the Einstein ring of the planet host star. We identify four possible solutions resulting from the well-known close/wide degeneracy. By measuring both the lens parallax and the Einstein radius, we estimate the physical parameters of the planetary system. According to the best-fit model, the two planet masses are ~0.11MJ and 0.68MJ and they are orbiting a G-type main-sequence star with a mass ~0.82M. The projected separations of the individual planets are beyond the snow line in all four solutions, being ~3.8AU and 4.6AU in the best-fit solution. The deprojected separations are both individually larger and possibly reversed in order. This is the second multi-planet system with both planets beyond the snow line discovered by microlensing. This is the only such system (other than the solar system) with measured planet masses without sin i degeneracy. The planetary system is located at a distance 4.1 kpc from the Earth toward the Galactic center. It is very likely that extra light from stars other than the lensed star comes from the lens itself. If this is correct, it will be possible to obtain detailed information about the planet host star from follow-up observation.
%@language en
%3 2041-8205_762_2_L28.pdf
%U http://iopscience.iop.org/2041-8205/762/2/L28/