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Title: Faint-source-star planetary microlensing: The discovery of the cold gas-giant planet OGLE-2014-BLG-0676Lb
Authors: Rattenbury, NJ
Bennett, DP
Sumi, T
Koshimoto, N
Bond, IA
Udalski, A
Shvartzvald, Y
Maoz, D
Jørgensen, 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
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
Mróz, P
Szymański, MK
Soszyński, I
Pietrukowicz, P
Kozłowski, S
Ulaczyk, K
Friedmann, M
Kaspi, S
Alsubai, K
Browne, P
Andersen, JM
Bozza, V
Calchi Novati, S
Damerdji, Y
Diehl, C
Dreizler, S
Elyiv, A
Giannini, E
Hardis, S
Harpsøe, 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
Figuera Jaimes, R
Horne, K
Menzies, J
Schmidt, R
Steele, IA
First Published: 10-Dec-2016
Publisher: Oxford University Press (OUP), Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society, 2017, 466 (3), pp. 2710-2717
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 3.09-1.12+1.02MJ planet orbiting a 0.62-0.22+0.20M⊙host star at a deprojected orbital separation of 4.40-1.46+2.16au. The distance to the lens system is 2.22-0.83+0.96kpc. 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.
DOI Link: 10.1093/mnras/stw3185
ISSN: 0035-8711
eISSN: 1365-2966
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2016, Oxford University Press (OUP), Royal Astronomical Society. Deposited with reference to the publisher’s open access archiving policy. (
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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