High-precision photometry by telescope defocusing - IV. Confirmation of the huge radius of WASP-17 b
文献类型：期刊论文
| 作者 | Southworth, J1; Hinse, TC2; Dominik, M3; Fang XS(房祥松)4 ; Harpsoe, K5,6; Jorgensen, UG5,6; Kerins, E7; Liebig, C3; Mancini, L8,9; Skottfelt, J5,6
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2012-10 |
| 卷号 | 426期号:2页码:1338-1348 |
| 关键词 | stars: fundamental parameters stars: individual: WASP-17 planetary systems |
| ISSN号 | 0035-8711 |
| 产权排序 | 第四完成单位 |
| 通讯作者 | Southworth, J (reprint author), Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England. |
| 英文摘要 | We present photometric observations of four transits in the WASP-17 planetary system, obtained using telescope defocusing techniques and with scatters reaching 0.5?mmag per point. Our revised orbital period is 4.0 +/- 0.6?s longer than previous measurements, a difference of 6.6s, and does not support the published detections of orbital eccentricity in this system. We model the light curves using the jktebop code and calculate the physical properties of the system by recourse to five sets of theoretical stellar model predictions. The resulting planetary radius, Rb = 1.932 +/- 0.052 +/- 0.010?RJup (statistical and systematic errors, respectively), provides confirmation that WASP-17?b is the largest planet currently known. All 14 planets with radii measured to be greater than 1.6?RJup are found around comparatively hot (Teff > 5900?K) and massive (MA > 1.15?M?) stars. Chromospheric activity indicators are available for eight of these stars, and all imply a low activity level. The planets have small or zero orbital eccentricities, so tidal effects struggle to explain their large radii. The observed dearth of large planets around small stars may be natural but could also be due to observational biases against deep transits, if these are mistakenly labelled as false positives and so not followed up. |
| 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 ; STELLAR EVOLUTION DATABASE ; PHYSICAL-PROPERTIES ; ECLIPSING BINARIES ; LOW-DENSITY ; GIANT PLANET ; LIGHT CURVES ; HOT-JUPITER ; EFFECTIVE TEMPERATURES ; ANGULAR DIAMETERS |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/426/2/1338 |
| 语种 | 英语 |
| WOS记录号 | WOS:000309456200041 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5215]  |
| 专题 | 云南天文台_恒星物理研究组 |
| 作者单位 | 1.Astrophysics Group, Keele University, Staffordshire, ST5 5BG 2.Korea Astronomy and Space Science Institute, Daejeon, 305-348, Republic of Korea 3.SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh, St Andrews, KY16 9SS 4.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming, 650011, China 5.Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, 2100, Copenhagen Ø, Denmark 6.Centre for Star and Planet Formation, Natural History Museum of Denmark, University of Copenhagen, øster Voldgade 5–7, 1350, Copenhagen K, Denmark 7.Jodrell Bank Centre for Astrophysics, University of Manchester, Oxford Road, Manchester, M13 9PL 8.Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany 9.Istituto Internazionale per gli Alti Studi Scientifici (IIASS), 84019, Vietri Sul Mare (SA), Italy 10.Institut d'Astrophysique et de Géophysique, Université de Liège, 4000, Liège, Belgium |
| 推荐引用方式 GB/T 7714 | Southworth, J,Hinse, TC,Dominik, M,et al. High-precision photometry by telescope defocusing - IV. Confirmation of the huge radius of WASP-17 b[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,426(2):1338-1348. |
| APA | Southworth, J.,Hinse, TC.,Dominik, M.,Fang XS.,Harpsoe, K.,...&Surdej, J.(2012).High-precision photometry by telescope defocusing - IV. Confirmation of the huge radius of WASP-17 b.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,426(2),1338-1348. |
| MLA | Southworth, J,et al."High-precision photometry by telescope defocusing - IV. Confirmation of the huge radius of WASP-17 b".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 426.2(2012):1338-1348. |
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来源：云南天文台
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