PLANET SENSITIVITY from COMBINED GROUND- and SPACE-BASED MICROLENSING OBSERVATIONS

W. Zhu, Andrew Gould, Charles Beichman, Sebastiano Calchi Novati, Sean Carey, B. Scott Gaudi, Calen B. Henderson, Matthew Penny, Yossi Shvartzvald, Jennifer C. Yee, A. Udalski, R. Poleski, J. Skowron, S. Kozłowski, P. Mróz, P. Pietrukowicz, G. Pietrzyński, M. K. Szymański, I. Soszyński, K. UlaczykL. Wyrzykowski, F. Abe, R. K. Barry, D. P. Bennett, A. Bhattacharya, I. A. Bond, M. Freeman, A. Fukui, Y. Hirao, Y. Itow, N. Koshimoto, H. Ling, K. Masuda, Y. Matsubara, Y. Muraki, M. Nagakane, K. Ohnishi, To Saito, D. J. Sullivan, T. Sumi, D. Suzuki, P. J. Tristram, N. Rattenbury, Y. Wakiyama, A. Yonehara, D. Maoz, S. Kaspi, M. Friedmann

Research output: Contribution to journalArticlepeer-review

Abstract

To move one step forward toward a Galactic distribution of planets, we present the first planet sensitivity analysis for microlensing events with simultaneous observations from space and the ground. We present this analysis for two such events, OGLE-2014-BLG-0939 and OGLE-2014-BLG-0124, which both show substantial planet sensitivity even though neither of them reached high magnification. This suggests that an ensemble of low to moderate magnification events can also yield significant planet sensitivity, and therefore probability, for detecting planets. The implications of our results to the ongoing and future space-based microlensing experiments to measure the Galactic distribution of planets are discussed.

Original languageEnglish
Article number129
JournalAstrophysical Journal
Volume814
Issue number2
DOIs
StatePublished - 1 Dec 2015

Keywords

  • gravitational lensing: micro
  • planetary systems

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