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

Rattenbury, NJ and Bennett, DP and Sumi, T and Koshimoto, N and Bond, IA and Udalski, A and Shvartzvald, Y and Maoz, D and Jorgensen, UG and Dominik, M and Street, RA and Tsapras, Y and Abe, F and Asakura, Y and Barry, R and Bhattacharya, A and Donachie, M and Evans, P and Freeman, M and Fukui, A and Hirao, Y and Itow, Y and Li, MCA and Ling, CH and Masuda, K and Matsubara, Y and Muraki, Y and Nagakane, M and Ohnishi, K and Oyokawa, H and Saito, T and Sharan, A and Sullivan, DJ and Suzuki, D and Tristram, PJ and Yonehara, A and Poleski, R and Skowron, J and Mroz, P and Szymanski, MK and Soszynski, I and Pietrukowicz, P and Kozlowski, S and Ulaczyk, K and Wyrzykowski, L and Friedmann, M and Kaspi, S and Alsubai, K and Browne, P and Andersen, JM and Bozza, V and Novati, SC and Damerdji, Y and Diehl, C and Dreizler, S and Elyiv, A and Giannini, E and Hardis, S and Harpsoe, K and Hinse, TC and Liebig, C and Hundertmark, M and Juncher, D and Kains, N and Kerins, E and Korhonen, H and Mancini, L and Martin, R and Mathiasen, M and Rabus, M and Rahvar, S and Scarpetta, G and Skottfelt, J and Snodgrass, C and Surdej, J and Taylor, J and Tregloan-Reed, J and Vilela, C and Wambsganss, J and Williams, A and D'Ago, G and Bachelet, E and Bramich, DM and Jaimes, RF and Horne, K and Menzies, J and 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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Abstract

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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