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http://dx.doi.org/10.5303/JKAS.2016.49.3.73

A SUPER-JUPITER MICROLENS PLANET CHARACTERIZED BY HIGH-CADENCE KMTNET MICROLENSING SURVEY OBSERVATIONS OF OGLE-2015-BLG-0954  

SHIN, I.-G. (Harvard-Smithsonian Center for Astrophysics)
RYU, Y.-H. (Korea Astronomy and Space Science Institute)
UDALSKI, A. (Warsaw University Observatory)
ALBROW, M. (Department of Physics and Astronomy, University of Canterbury)
CHA, S.-M. (Korea Astronomy and Space Science Institute)
CHOI, J.-Y. (Busan National Science Museum)
CHUNG, S.-J. (Korea Astronomy and Space Science Institute)
HAN, C. (Department of Physics, Chungbuk National University)
HWANG, K.-H. (Department of Physics, Chungbuk National University)
JUNG, Y.K. (Harvard-Smithsonian Center for Astrophysics)
KIM, D.-J. (Korea Astronomy and Space Science Institute)
KIM, S.-L. (Korea Astronomy and Space Science Institute)
LEE, C.-U. (Korea Astronomy and Space Science Institute)
LEE, Y. (Korea Astronomy and Space Science Institute)
PARK, B.-G. (Korea Astronomy and Space Science Institute)
PARK, H. (Busan National Science Museum)
POGGE, R.W. (Department of Astronomy Ohio State University)
YEE, J.C. (Harvard-Smithsonian Center for Astrophysics)
PIETRUKOWICZ, P. (Warsaw University Observatory)
MROZ, P. (Warsaw University Observatory)
KOZLOWSKI, S. (Warsaw University Observatory)
POLESKI, R. (Warsaw University Observatory)
SKOWRON, J. (Warsaw University Observatory)
SOSZYNSKI, I. (Warsaw University Observatory)
SZYMANSKI, M.K. (Warsaw University Observatory)
ULACZYK, K. (Warsaw University Observatory)
WYRZYKOWSKI, L. (Warsaw University Observatory)
PAWLAK, M. (Warsaw University Observatory)
GOULD, A. (Korea Astronomy and Space Science Institute)
Publication Information
Journal of The Korean Astronomical Society / v.49, no.3, 2016 , pp. 73-81 More about this Journal
Abstract
We report the characterization of a massive (mp = 3.9±1.4Mjup) microlensing planet (OGLE-2015-BLG-0954Lb) orbiting an M dwarf host (M = 0.33 ± 0.12M⊙) at a distance toward the Galactic bulge of $0.6^{+0.4}_{-0.2}kpc$, which is extremely nearby by microlensing standards. The planet-host projected separation is a⊥ ~ 1.2AU. The characterization was made possible by the wide-field (4 deg2) high cadence (Γ = 6 hr–1) monitoring of the Korea Microlensing Telescope Network (KMTNet), which had two of its three telescopes in commissioning operations at the time of the planetary anomaly. The source crossing time t* = 16 min is among the shortest ever published. The high-cadence, wide-field observations that are the hallmark of KMTNet are the only way to routinely capture such short crossings. High-cadence resolution of short caustic crossings will preferentially lead to mass and distance measurements for the lens. This is because the short crossing time typically implies a nearby lens, which enables the measurement of additional effects (bright lens and/or microlens parallax). When combined with the measured crossing time, these effects can yield planet/host masses and distance.
Keywords
gravitational microlensing; planets;
Citations & Related Records
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