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The transiting system GJ1214: high-precision defocused transit observations and a search for evidence of transit timing variation
Harpsoe, KBW; Hardis, S; Hinse, TC; Jorgensen, G; Mancini, L; Southworth, J; Alsubai, KA; Bozza, V; Browne, P; Burgdorf, MJ; Novati, SC; Dodds, P; Dominik, M; Fang XS(房祥松); Finet, F; Gerner, T; Gu SH(顾盛宏); Hundertmark, M; Jessen-Hansen, J; Kains, N; Kerins, E; Kjeldsen, H; Liebig, C; Lund, MN; Lundkvist, M; Mathiasen, M; Nesvorny, D; Nikolov, N; Penny, MT; Proft, S; Rahvar, S; Ricci, D; Sahu, KC; Scarpetta, G; Schafer, S; Schonebeck, F; Snodgrass, C; Skottfelt, J; Surdej, J; Tregloan-Reed, J; Wertz, O; Harpsoe, KBW (reprint author), Univ Copenhagen, Niels Bohr Inst, Juliane Maries Vej 30, DK-2100 Copenhagen O, Denmark.
发表期刊ASTRONOMY & ASTROPHYSICS
2013-01
卷号549
DOI10.1051/0004-6361.201219996
产权排序第21完成单位
收录类别SCI ; EI
关键词Planetray Systems Stars: Individual: Gj1214 Methods: Statistical Methods: Observational Techniques: Photometric
摘要Aims. We present 11 high-precision photometric transit observations of the transiting super-Earth planet GJ 1214 b. Combining these data with observations from other authors, we investigate the ephemeris for possible signs of transit timing variations (TTVs) using a Bayesian approach. Methods. The observations were obtained using telescope-defocusing techinques, and achieve a high precision with random errors in the photometry as low as 1 mmag per point. To investigate the possiblity of TTVs in the light curve, we calculate the overall probability of a TTV signal using Bayesian methods. Results. The observations are used to determine the photometric parameters and the physical properties of the GJ 1214 system. Our results are in good agreement with published values. Individual times of mid-transit are measured with uncertainites as low as 10 s, allowing us to reduce the uncertainity in the orbital period by a factor or two. Conclusions. A Bayesian analysis reveals that it is highly improbable that the observed transit times is explained by TTV caused by a planet in the nominal habitable zone, when compared with the simpler alternative of a linear ephemeris.
项目资助者STFC ; Communaute francaise de Belgique - Actions de recherche concertees - Academie universitaire Wallonie-Europe ; KASI [2012-1-410-02] ; NPRP grant, Qatar National Research Fund (a member of Qatar Foundation) [NPRP-09-476-1-78]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6361
URL查看原文
WOS记录号WOS:000313745000010
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]EXTRASOLAR PLANETS ; ECLIPSING BINARIES ; GJ 1214B ; PHYSICAL-PROPERTIES ; ADDITIONAL PLANETS ; OPEN CLUSTERS ; MASS ; PHOTOMETRY ; ATMOSPHERE ; EXOPLANETS
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6797
专题系外行星研究组
通讯作者Harpsoe, KBW (reprint author), Univ Copenhagen, Niels Bohr Inst, Juliane Maries Vej 30, DK-2100 Copenhagen O, Denmark.
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Harpsoe, KBW,Hardis, S,Hinse, TC,et al. The transiting system GJ1214: high-precision defocused transit observations and a search for evidence of transit timing variation[J]. ASTRONOMY & ASTROPHYSICS,2013,549.
APA Harpsoe, KBW.,Hardis, S.,Hinse, TC.,Jorgensen, G.,Mancini, L.,...&Harpsoe, KBW .(2013).The transiting system GJ1214: high-precision defocused transit observations and a search for evidence of transit timing variation.ASTRONOMY & ASTROPHYSICS,549.
MLA Harpsoe, KBW,et al."The transiting system GJ1214: high-precision defocused transit observations and a search for evidence of transit timing variation".ASTRONOMY & ASTROPHYSICS 549(2013).
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