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Faint-source-star planetary microlensing: the discovery of the cold gas-giant planet OGLE-2014-BLG-0676Lb

Rattenbury, NJ, Bennett, DP, Sumi, T, Koshimoto, N, Bond, IA, Udalski, A, Shvartzvald, Y, Maoz, D, Jorgensen, UG, Dominik, M, Street, RA, Tsapras, Y, Abe, F, Asakura, Y, Barry, R, Bhattacharya, A, Donachie, M, Evans, P, Freeman, M, Fukui, A , Hirao, Y, Itow, Y, Li, MCA, Ling, CH, Masuda, K, Matsubara, Y, Muraki, Y, Nagakane, M, Ohnishi, K, Oyokawa, H, Saito, T, Sharan, A, Sullivan, DJ, Suzuki, D, Tristram, PJ, Yonehara, A, Poleski, R, Skowron, J, Mroz, P, Szymanski, MK, Soszynski, I, Pietrukowicz, P, Kozlowski, S, Ulaczyk, K, Wyrzykowski, L, Friedmann, M, Kaspi, S, Alsubai, K, Browne, P, Andersen, JM, Bozza, V, Novati, SC, Damerdji, Y, Diehl, C, Dreizler, S, Elyiv, A, Giannini, E, Hardis, S, Harpsoe, K, Hinse, TC, Liebig, C, Hundertmark, M, Juncher, D, Kains, N, Kerins, E, Korhonen, H, Mancini, L, Martin, R, Mathiasen, M, Rabus, M, Rahvar, S, Scarpetta, G, Skottfelt, J, Snodgrass, C, Surdej, J, Taylor, J, Tregloan-Reed, J, Vilela, C, Wambsganss, J, Williams, A, D'Ago, G, Bachelet, E, Bramich, DM, Jaimes, RF, Horne, K, Menzies, J, Schmidt, R and Steele, IA (2016) Faint-source-star planetary microlensing: the discovery of the cold gas-giant planet OGLE-2014-BLG-0676Lb. Monthly Notices of the Royal Astronomical Society, 466 (3). pp. 2710-2717. ISSN 0035-8711

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We report the discovery of a planet – OGLE-2014-BLG-0676Lb– via gravitational microlensing. Observations for the lensing event were made by the following groups: Microlensing Observations in Astrophysics; Optical Gravitational Lensing Experiment; Wise Observatory; RoboNET/Las Cumbres Observatory Global Telescope; Microlensing Network for the Detection of Small Terrestrial Exoplanets; and μ-FUN. All analyses of the light-curve data favour a lens system comprising a planetary mass orbiting a host star. The most-favoured binary lens model has a mass ratio between the two lens masses of (4.78 ± 0.13) × 10−3. Subject to some important assumptions, a Bayesian probability density analysis suggests the lens system comprises a 3.09+1.02 −1.12 MJ planet orbiting a 0.62+0.20 −0.22 M host star at a deprojected orbital separation of 4.40+2.16 −1.46 au. The distance to the lens system is 2.22+0.96 −0.83 kpc. Planet OGLE- 2014-BLG-0676Lb provides additional data to the growing number of cool planets discovered using gravitational microlensing against which planetary formation theories may be tested. Most of the light in the baseline of this event is expected to come from the lens and thus high-resolution imaging observations could confirm our planetary model interpretation.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Related URLs:
Date Deposited: 13 Oct 2017 09:24
Last Modified: 13 Oct 2017 09:24
DOI or Identification number: 10.1093/mnras/stw3185
URI: http://researchonline.ljmu.ac.uk/id/eprint/7343

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