MOA-2013-BLG-220Lb: massive planetary companion to galactic-disk host

Yee, J. C.; Han, C.; Gould, A.; Skowron, J.; Bond, I. A.; Udalski, A.; Hundertmark, M.; Monard, L. A. G.; Porritt, I.; Nelson, P.; Bozza, V.; Albrow, M. D.; Choi, J.-Y.; Christie, G. W.; DePoy, D. L.; Gaudi, B. S.; Hwang, K.-H.; Jung, Y. K.; Lee, C.-U.; McCormick, J.; Natusch, T.; Ngan, H.; Park, H.; Pogge, R. W.; Shin, I.-G.; Tan, T.-G.; Abe, F.; Bennett, D. P.; Botzler, C. S.; Freeman, M.; Fukui, A.; Fukunaga, D.; Itow, Y.; Koshimoto, N.; Larsen, P.; Ling, C. H.; Masuda, K.; Matsubara, Y.; Muraki, Y.; Namba, S.; Ohnishi, K.; Philpott, L.; Rattenbury, N. J.; Saito, To.; Sullivan, D. J.; Sumi, T.; Sweatman, W. L.; Suzuki, D.; Tristram, P. J.; Tsurumi, N.; Wada, K.; Yamai, N.; Yock, P. C. M.; Yonehara, A.; Szymański, M. K.; Ulaczyk, K.; Kozłowski, S.; Poleski, R.; Wyrzykowski, Ł.; Kubiak, M.; Pietrukowicz, P.; Pietrzyński, G.; Soszyński, I.; Bramich, D. M.; Browne, P.; Figuera Jaimes, R.; Horne, K.; Ipatov, S.; Kains, N.; Snodgrass, C.; Steele, I. A.; Street, R. and Tsapras, Y. (2014). MOA-2013-BLG-220Lb: massive planetary companion to galactic-disk host. Astrophysical Journal, 790(1), article no. 14.



We report the discovery of MOA-2013-BLG-220Lb, which has a super-Jupiter mass ratio q = 3.01 ± 0.02 × 10–3 relative to its host. The proper motion, μ = 12.5 ± 1 mas yr–1, is one of the highest for microlensing planets yet discovered, implying that it will be possible to separately resolve the host within ~7 yr. Two separate lines of evidence imply that the planet and host are in the Galactic disk. The planet could have been detected and characterized purely with follow-up data, which has important implications for microlensing surveys, both current and into the Large Synoptic Survey Telescope (LSST) era.

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