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

J. C. Yee, C. Han, A. Gould, J. Skowron, I. A. Bond, A. Udalski, M. Hundertmark, L. A G Monard, I. Porritt, P. Nelson, V. Bozza, M. D. Albrow, J. Y. Choi, G. W. Christie, D. L. Depoy, B. S. Gaudi, K. H. Hwang, Y. K. Jung, C. U. Lee, J. McCormickT. Natusch, H. Ngan, H. Park, R. W. Pogge, I. G. Shin, T. G. Tan, F. Abe, D. P. Bennett, C. S. Botzler, M. Freeman, A. Fukui, D. Fukunaga, Y. Itow, N. Koshimoto, P. Larsen, C. H. Ling, K. Masuda, Y. Matsubara, Y. Muraki, S. Namba, K. Ohnishi, L. Philpott, N. J. Rattenbury, To Saito, D. J. Sullivan, T. Sumi, W. L. Sweatman, D. Suzuki, P. J. Tristram, N. Tsurumi, K. Wada, N. Yamai, P. C M Yock, A. Yonehara, M. K. Szymański, K. Ulaczyk, S. Kozłowski, R. Poleski, [No Value] Wyrzykowski, M. Kubiak, P. Pietrukowicz, G. Pietrzyński, I. Soszyński, D. M. Bramich, P. Browne, R. Figuera Jaimes, K. Horne, S. Ipatov, N. Kains, C. Snodgrass, I. A. Steele, R. Street, Y. Tsapras

Research output: Contribution to journalArticle

7 Citations (Scopus)


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.

Original languageEnglish
Article number14
JournalAstrophysical Journal
Issue number1
Publication statusPublished - 20 Jul 2014



  • gravitational lensing: micro
  • planetary systems

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

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., ... Tsapras, Y. (2014). MOA-2013-BLG-220Lb: Massive planetary companion to galactic-disk host. Astrophysical Journal, 790(1), [14].