MOA-2013-BLG-220Lb: MASSIVE PLANETARY COMPANION TO GALACTIC-DISK HOST

/ Authors

J. Yee, C. Han, A. Gould, J. Skowron, I. Bond, A. Udalski, M. Hundertmark, L. Monard, I. Porritt, P. Nelson

and 63 more authors

V. Bozza, M. Albrow, J.-Y. Choi, G. Christie, D. DePoy, B. Gaudi, K. Hwang, Y. Jung, C.‐U. Lee, J. Mccormick, T. Natusch, H. Ngan, H. Park, R. Pogge, I. Shin, T. Tan, F. Abe, D. Bennett, C. Botzler, M. Freeman, A. Fukui, D. Fukunaga, Y. Itow, N. Koshimoto, P. Larsen, C. Ling, K. Masuda, Y. Matsubara, Y. Muraki, S. Namba, K. Ohnishi, L. Philpott, N. Rattenbury, T. Saito, D. Sullivan, T. Sumi, W. Sweatman, D. Suzuki, P. Tristram, N. Tsurumi, K. Wada, N. Yamai, P. Yock, A. Yonehara, M. Szyma'nski, K. Ulaczyk, S. Kozłowski, R. Poleski, Ł. Wyrzykowski, M. Kubiak, P. Pietrukowicz, G. Pietrzy'nski, I. Soszy'nski, D. Bramich, P. Browne, R. Figuera Jaimes, K. Horne, S. Ipatov, N. Kains, C. Snodgrass, I. Steele, R. Street, Y. Tsapras

/ Abstract

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.

Journal: The Astrophysical Journal

DOI: 10.1088/0004-637X/790/1/14