Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry
文献类型：期刊论文
| 作者 | Mancini, L.1,2; Ciceri, S.1; Chen, G.1,3,4; Tregloan-Reed, J.5; Fortney, J. J.6; Southworth, J.5; Tan, T. G.7; Burgdorf, M.8; Novati, S. Calchi2,9; Dominik, M.10 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2013-11-01 |
| 卷号 | 436期号:1页码:2-18 |
| 关键词 | techniques: photometric stars: fundamental parameters stars: individual: WASP-19 planetary systems starspots |
| ISSN号 | 0035-8711 |
| 通讯作者 | Mancini, L (通讯作者)Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany. |
| 英文摘要 | 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | 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 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000326435100025 |
| 公开日期 | 2014-01-08 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/9786]  |
| 专题 | 紫金山天文台_暗物质和空间天文实验室 |
| 作者单位 | 1.Max Planck Inst Astron, D-69117 Heidelberg, Germany 2.Univ Salerno, Dept Phys, I-84084 Fisciano, SA, Italy 3.Purple Mt Observ, Nanjing 210008, Peoples R China 4.Key Lab Radio Astron, Nanjing 210008, Peoples R China 5.Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England 6.Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA 7.Perth Exoplanet Survey Telescope, Perth, WA, Australia 8.HE Space Operat GmbH, D-28199 Bremen, Germany 9.IIASS, I-84019 Vietri Sul Mare, SA, Italy 10.Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland |
| 推荐引用方式 GB/T 7714 | 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, J. J..,...&Surdej, J..(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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