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

Rattenbury, N. J. and Calchi Novati, S. (2017) 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.

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URLURL TypeDescription Paper
Calchi Novati, S.0000-0002-7669-1069
Additional Information:© 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2016 December 5. Received 2016 December 4; in original form 2016 September 25. TS acknowledges financial support from the Japan Society for the Promotion of Science (JSPS) under grant numbers JSPS23103002, JSPS24253004 and JSPS26247023. NK is supported by Grant-in-Aid for JSPS Fellows. The MOA project is supported by JSPS grants JSPS25103508 and JSPS23340064 and by the Royal Society of New Zealand Marsden Grant MAU1104. NJR acknowledges the contribution of NeSI high-performance computing facilities to the results of this research. New Zealand's national facilities are provided by the NZ eScience Infrastructure and funded jointly by NeSI's collaborator institutions and through the Ministry of Business, Innovation & Employment's Research Infrastructure programme ( The OGLE team thanks Prof. M. Kubiak and G. Pietrzyński, former members of the OGLE team, for their contribution to the collection of the OGLE photometric data over the past years. The OGLE project has received funding from the National Science Centre, Poland, grant MAESTRO 2014/14/A/ST9/00121 to AU. The Danish 1.54 m telescope is operated based on a grant from the Danish Natural Science Foundation (FNU). The MiNDSTEp monitoring campaign is powered by ARTEMiS (Automated Terrestrial Exoplanet Microlensing Search; Dominik et al. 2008). This publication was made possible by NPRP grant nos. X-019-1-006 and 09-467-1-078 from the Qatar National Research Fund (a member of Qatar Foundation). KH acknowledges support from STFC grant ST/M001296/1. GD acknowledges Regione Campania for support from POR-FSE Campania 2014-2020. TCH acknowledges support from the Korea Research Council of Fundamental Science & Technology (KRCF) via the KRCF Young Scientist Research Fellowship Programme and for financial support from KASI travel grant number 2014-1-400-06. JS acknowledges support from the Communauté française de Belgique - Actions de recherche concertées - Académie Wallonie-Europe. This work has made extensive use of the ADS service, for which we are thankful. This work makes use of observations from the LCOGT network, which includes three SUPAscopes owned by the University of St Andrews. The RoboNET programme is an LCOGT Key Project using time allocations from the University of St Andrews, LCOGT and the University of Heidelberg together with time on the Liverpool Telescope through the Science and Technology Facilities Council (STFC), UK. This research has made use of the LCOGT Archive, which is operated by the California Institute of Technology, under contract with the Las Cumbres Observatory. The authors thank Matthew Penny for his comments on this manuscript.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Japan Society for the Promotion of Science (JSPS)JSPS23103002
Japan Society for the Promotion of Science (JSPS)JSPS24253004
Japan Society for the Promotion of Science (JSPS)JSPS26247023
Japan Society for the Promotion of Science (JSPS)JSPS25103508
Japan Society for the Promotion of Science (JSPS)JSPS23340064
Royal Society of New ZealandMAU1104
NeSI's collaborator institutionsUNSPECIFIED
Ministry of Business, Innovation and Employment (New Zealand)UNSPECIFIED
National Science Centre (Poland)MAESTRO 2014/14/A/ST9/00121
Danish Natural Science FoundationUNSPECIFIED
Qatar National Research FundX-019-1-006
Qatar National Research Fund09-467-1-078
Science and Technology Facilities Council (STFC)ST/M001296/1
POR-FSE Campania2014-2020
Korea Astronomy and Space Science Institute (KASI)2014-1-400-06
Communauté française de Belgique – Actions de recherche concertées – Académie universitaire Wallonie-EuropeUNSPECIFIED
Las Cumbres ObservatoryUNSPECIFIED
Issue or Number:3
Record Number:CaltechAUTHORS:20170505-085905258
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Official Citation:N. J. Rattenbury, D. P. Bennett, T. Sumi, N. Koshimoto, I. A. Bond, A. Udalski, Y. Shvartzvald, D. Maoz, U. G. Jørgensen, M. Dominik, R. A. Street, Y. Tsapras, F. Abe, Y. Asakura, R. Barry, A. Bhattacharya, M. Donachie, P. Evans, M. Freeman, A. Fukui, Y. Hirao, Y. Itow, M. C. A. Li, C. H. Ling, K. Masuda, Y. Matsubara, Y. Muraki, M. Nagakane, K. Ohnishi, H. Oyokawa, To. Saito, A. Sharan, D. J. Sullivan, D. Suzuki, P. J. Tristram, A. Yonehara, R. Poleski, J. Skowron, P. Mróz, M. K. Szymański, I. Soszyński, P. Pietrukowicz, S. Kozłowski, K. Ulaczyk, Ł. Wyrzykowski, M. Friedmann, S. Kaspi, K. Alsubai, P. Browne, J. M. Andersen, V. Bozza, S. Calchi Novati, Y. Damerdji, C. Diehl, S. Dreizler, A. Elyiv, E. Giannini, S. Hardis, K. Harpsøe, T. C. Hinse, C. Liebig, M. Hundertmark, D. Juncher, N. Kains, E. Kerins, H. Korhonen, L. Mancini, R. Martin, M. Mathiasen, M. Rabus, S. Rahvar, G. Scarpetta, J. Skottfelt, C. Snodgrass, J. Surdej, J. Taylor, J. Tregloan-Reed, C. Vilela, J. Wambsganss, A. Williams, G. D'Ago, E. Bachelet, D. M. Bramich, R. Figuera Jaimes, K. Horne, J. Menzies, R. Schmidt, I. A. Steele; Faint-source-star planetary microlensing: the discovery of the cold gas-giant planet OGLE-2014-BLG-0676Lb. Mon Not R Astron Soc 2017; 466 (3): 2710-2717. doi: 10.1093/mnras/stw3185
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77209
Deposited By: Ruth Sustaita
Deposited On:05 May 2017 16:27
Last Modified:03 Oct 2019 17:54

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