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

Zhu, W., Andrew Gould, Charles Beichman, S. Calchi Novati, S. Carey, B. Scott Gaudi, Calen B. Henderson, Matthew T. 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. Ulaczyk, Wyrzykowski, L., F. Abe, Richard Barry, D. P. Bennett, Aparna Bhattacharya, I. A. Bond, M. Freeman, Akihiko Fukui, Yuki Hirao, Y. Itow, Naoki Koshimoto, Hu Ling, K. Masuda

Open publisher page 9 citations

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.

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What this paper is about

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.

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Available 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.

Key concepts: Gravitational microlensing, Planet, Physics, Sensitivity (control systems), Astronomy, Astrophysics, Magnification, Space (punctuation)

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