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Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry
Mancini, L; Ciceri, S; Chen, G; Tregloan-Reed, J; Fortney, JJ; Southworth, J; Tan, TG; Burgdorf, M; Novati, SC; Dominik, M; Fang XS(房祥松); Finet, F; Gerner, T; Hardis, S; Hinse, TC; Jorgensen, UG; Liebig, C; Nikolov, N; Ricci, D; Schaefer, S; Schoenebeck, F; Skottfelt, J; Wertz, O; Alsubai, KA; Bozza, V; Browne, P; Dodds, P; Gu SH(顾盛宏); Harpsoe, K; Henning, T; Hundertmark, M; Jessen-Hansen, J; Kains, N; Kerins, E; Kjeldsen, H; Lund, MN; Lundkvist, M; Madhusudhan, N; Mathiasen, M; Penny, MT; Prof, S; Rahvar, S; Sahu, K; Scarpetta, G; Snodgrass, C; Surdej, J; Mancini, L (reprint author), Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany.
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2013-11
卷号436期号:1页码:2-18
DOI10.1093/mnras/stt1394
产权排序第10完成单位
收录类别SCI
关键词Techniques: Photometric Stars: Fundamental Parameters Stars: Individual: Wasp-19 Planetary Systems Starspots
摘要We present new ground-based, multi-colour, broad-band photometric measurements of the physical parameters, transmission and emission spectra of the transiting extrasolar planet WASP-19b. The measurements are based on observations of eight transits and four occultations through a Gunn i filter using the 1.54-m Danish Telescope, 14 transits through an R-c filter at the Perth Exoplanet Survey Telescope (PEST) observatory and one transit observed simultaneously through four optical (Sloan g', r', i', z') and three near-infrared (J, H, K) filters, using the Gamma Ray Burst Optical and Near-Infrared Detector (GROND) instrument on the MPG/ESO 2.2-m telescope. The GROND optical light curves have a point-to-point scatter around the best-fitting model between 0.52 and 0.65 mmag rms. We use these new data to measure refined physical parameters for the system. We find the planet to be more bloated (R-b = 1.410 +/- 0.017R(Jup); M-b = 1.139 +/- 0.030M(Jup)) and the system to be twice as old as initially thought. We also used published and archived data sets to study the transit timings, which do not depart from a linear ephemeris. We detected an anomaly in the GROND transit light curve which is compatible with a spot on the photosphere of the parent star. The starspot position, size, spot contrast and temperature were established. Using our new and published measurements, we assembled the planet's transmission spectrum over the 370-2350 nm wavelength range and its emission spectrum over the 750-8000 nm range. By comparing these data to theoretical models we investigated the theoretically predicted variation of the apparent radius of WASP-19b as a function of wavelength and studied the composition and thermal structure of its atmosphere. We conclude that: (i) there is no evidence for strong optical absorbers at low pressure, supporting the common idea that the planet's atmosphere lacks a dayside inversion; (ii) the temperature of the planet is not homogenized, because the high warming of its dayside causes the planet to be more efficient in re-radiating than redistributing energy to the night side; (iii) the planet seems to be outside of any current classification scheme.
项目资助者STFC ; European Community [229517, 268421] ; Danish National Research Foundation ; Qatar Foundation from QNRF [NPRP-09-476-1-078] ; NSFC [10873031] ; Chinese Academy of Sciences [KJCX2-YW-T24] ; ASTERISK project (ASTERoseismic Investigations with SONG and Kepler) ; European Research Council [267864] ; Communaute francaise de Belgique - Actions de recherche concertees-Academie Wallonie-Europe ; Korea Research Council for Fundamental Science and Technology (KRCF) through the Young Research Scientist Fellowship Program ; KASI (Korea Astronomy and Space Science Institute) [2012-1-410-02/2013-9-400-00]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0035-8711
URL查看原文
WOS记录号WOS:000326435100025
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]TRANSITING EXTRASOLAR PLANETS ; HIGH-PRECISION PHOTOMETRY ; GROUND-BASED DETECTION ; EXOPLANET WASP-19B ; THERMAL EMISSION ; HOT-JUPITER ; LIGHT CURVES ; TELESCOPE ; ATMOSPHERES ; RADIUS
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6790
专题系外行星研究组
中国科学院天体结构与演化重点实验室
通讯作者Mancini, L (reprint author), Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany.
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Mancini, L,Ciceri, S,Chen, G,et al. Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,436(1):2-18.
APA Mancini, L.,Ciceri, S.,Chen, G.,Tregloan-Reed, J.,Fortney, JJ.,...&Mancini, L .(2013).Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,436(1),2-18.
MLA Mancini, L,et al."Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 436.1(2013):2-18.
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