| High-precision photometry by telescope defocusing - IV. Confirmation of the huge radius of WASP-17 b | |
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; Anderson, DR1; Smalley, B1; Tregloan-Reed, J1; Wertz, O10; Alsubai, KA11; Bozza, V9,12,13; Novati, SC9,12; Dreizler, S14; Gu SH(顾盛宏)4; Hundertmark, M3,14; Jessen-Hansen, J15,16; Kains, N17; Kjeldsen, H15; Lund, MN15; Lundkvist, M15; Mathiasen, M5; Penny, MT7,18; Rahvar, S19,20; Ricci, D10; Scarpetta, G9,12,13; Snodgrass, C; Surdej, J10; Southworth, J (reprint author), Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England.
| |
| 发表期刊 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 2012-10 | |
| 卷号 | 426期号:2页码:1338-1348 |
| DOI | 10.1111/j.1365-2966.2012.21781.x |
| 产权排序 | 第4完成单位 |
| 收录类别 | SCI |
| 关键词 | Stars: Fundamental Parameters Stars: Individual: Wasp-17 Planetary Systems |
| 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. |
| 项目资助者 | STFC ; Danish Natural Science Research Council ; European Community [229517, 268421] ; ASTERISK project ; European Research Council [267864] ; Centres of Excellence Centre for Star and Planet Formation (StarPlan) ; Stellar Astrophysics Centre (SAC) ; Danish National Research Foundation ; Qatar National Research Fund (QNRF), a member of Qatar Foundation [NPRP 09-476-1-078] ; NSFC [10873031] ; Communaute francaise de Belgique - Actions de recherche concertees - Academie Wallonie-Europe |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0035-8711 |
| URL | 查看原文 |
| WOS记录号 | WOS:000309456200041 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | 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 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5215 |
| 专题 | 恒星物理研究组 |
| 通讯作者 | Southworth, J (reprint author), Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England. |
| 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 11.Qatar Foundation, PO Box 5825, Doha, Qatar 12.Dipartimento di Fisica ‘E. R. Caianiello’, Università di Salerno, Via Ponte Don Melillo, 84084, Fisciano (SA), Italy 13.Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, Italy 14.Institut für Astrophysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany 15.Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000, Aarhus C, Denmark 16.Nordic Optical Telescope, Apartado 474, E-38700, Santa Cruz de La Palma, Spain 17.European Southern Observatory, Karl-Schwarzschild-Straße 2, 85748, Garching bei München, Germany 18.Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH, 43210, USA 19.Department of Physics, Sharif University of Technology, PO Box 11155-9161, Tehran, Iran 20.Perimeter Institute for Theoretical Physics, 31 Caroline Street North, Waterloo, Ontario, N2L 2Y5, Canada |
| 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.,...&Southworth, 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. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| High-precision photo（1569KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论