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

We report the discovery of a planet — OGLE-2014-BLG-0676Lb— via gravitational microlensing. Observations for the lensing event were made by the MOA, OGLE, Wise, RoboNET/LCOGT, MiNDSTEp and μFUN groups. 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.

Citation

Rattenbury , N J , Bennett , D P , Sumi , T , Koshimoto , N , Bond , I A , Udalski , A , Shvartzvald , Y , Maoz , D , Jørgensen , U G , Dominik , M , Street , R A , Tsapras , Y , Abe , F , Asakura , Y , Barry , R , Bhattacharya , A , Donachie , M , Evans , P , Freeman , M , Fukui , A , Hirao , Y , Itow , Y , Li , M C A , Ling , C H , Masuda , K , Matsubara , Y , Muraki , Y , Nagakane , M , Ohnishi , K , Oyokawa , H , Saito , T , Sharan , A , Sullivan , D J , Suzuki , D , Tristram , P J , Yonehara , A , Poleski , R , Skowron , J , Mróz , P , Szymański , M K , Soszyński , I , Pietrukowicz , P , Kozłowski , S , Ulaczyk , K , Wyrzykowski , Ł , Friedmann , M , Kaspi , S , Alsubai , K , Browne , P , Andersen , J M , Bozza , V , Novati , S C , Damerdji , Y , Diehl , C , Dreizler , S , Elyiv , A , Giannini , E , Hardis , S , Harpsøe , K , Hinse , T C , 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 , D M , Figuera Jaimes , R , Horne , K , Menzies , J , Schmidt , R & Steele , I A 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 , vol. 466 , no. 3 , pp. 2710-2717 . https://doi.org/10.1093/mnras/stw3185

Publication

Monthly Notices of the Royal Astronomical Society

Status

Peer reviewed

DOI

https://doi.org/10.1093/mnras/stw3185

ISSN

0035-8711

Type

Journal article

Rights

© 2016, the Author(s). This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at mnras.oxfordjournals.org / https://doi.org/10.1093/mnras/stw3185

Collections

University of St Andrews Research

URI

http://hdl.handle.net/10023/9992