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High-precision photometry by telescope defocussing - VIII. WASP-22, WASP-41, WASP-42 and WASP-55
Southworth, John1; Tregloan-Reed, J.2; Andersen, M. I.3; Novati, S. Calchi4,5,6; Ciceri, S.7; Colque, J. P.8; D'Ago, G.6; Dominik, M.9,34; Evans, D. F.1; Gu SH(顾盛宏)10,11; Herrera-Cordova, A.8; Hinse, T. C.12; Jorgensen, U. G.13; Juncher, D.13; Kuffmeier, M.13; Mancini, L.7,14; Peixinho, N.8; Popovas, A.13; Rabus, M.7,15; Skottfelt, J.13,16; Tronsgaard, R.17; Unda-Sanzana, E.8; Wang XB(王晓彬)10,11; Wertz, O.18; Alsubai, K. A.19; Andersen, J. M.13,20; Bozza, V.5,21; Bramich, D. M.19; Burgdorf, M.22; Damerdji, Y.18; Diehl, C.23,24; Elyiv, A.18,25,26; Jaimes, R. Figuera9,27; Haugbolle, T.13; Hundertmark, M.13; Kains, N.28; Kerins, E.29; Korhonen, H.3,13,30; Liebig, C.9; Mathiasen, M.13; Penny, M. T.31; Rahvar, S.32; Scarpetta, G.5,6,21; Schmidt, R. W.23; Snodgrass, C.33; Starkey, D.9; Surdej, J.18; Vilela, C.1; von Essen, C.17; Wang, Y.10
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2016-04-21
Volume457Issue:4Pages:4205-4217
DOI10.1093/mnras/stw279
Contribution Rank第10完成单位
Indexed BySCI
Keywordstars: fundamental parameters stars: individual: WASP-22, WASP-41, WASP-42, WASP-55 planetary systems
Abstract

We present 13 high-precision and four additional light curves of four bright southern-hemisphere transiting planetary systems: WASP-22, WASP-41, WASP-42 and WASP-55. In the cases of WASP-42 and WASP-55, these are the first follow-up observations since their discovery papers. We present refined measurements of the physical properties and orbital ephemerides of all four systems. No indications of transit timing variations were seen. All four planets have radii inflated above those expected from theoretical models of gas-giant planets; WASP-55 b is the most discrepant with a mass of 0.63M(Jup) and a radius of 1.34 R-Jup. WASP-41 shows brightness anomalies during transit due to the planet occulting spots on the stellar surface. Two anomalies observed 3.1 d apart are very likely due to the same spot. We measure its change in position and determine a rotation period for the host star of 18.6 +/- 1.5 d, in good agreement with a published measurement from spot-induced brightness modulation, and a sky-projected orbital obliquity of lambda = 6 +/- 11 degrees. We conclude with a compilation of obliquity measurements from spot-tracking analyses and a discussion of this technique in the study of the orbital configurations of hot Jupiters.

Funding ProjectDanish Council for Independent Research, Natural Sciences (FNU) ; Leverhulme Trust ; ORAU (Oak Ridge Associated Universities) ; NASA ; UK's Science and Technology Facilities Council ; CONICYT QUIMAL[130004] ; Danish National Research Foundation[DNRF106] ; ASTERISK project (ASTERoseismic Investigations with SONG and Kepler) - European Research Council[267864] ; KASI[2012-1-410-02] ; KASI[2013-9-400-00] ; KASI[2014-1-400-06] ; KASI[2015-1-850-04] ; Gemini-Conicyt Fund[32120036] ; Regione Campania from POR-FSE Campania ; Communaute francaise de Belgique - Actions de recherche concertees - Academie Wallonie-Europe
Funding OrganizationDanish Council for Independent Research, Natural Sciences (FNU) ; Leverhulme Trust ; ORAU (Oak Ridge Associated Universities) ; NASA ; UK's Science and Technology Facilities Council ; CONICYT QUIMAL[130004] ; Danish National Research Foundation[DNRF106] ; ASTERISK project (ASTERoseismic Investigations with SONG and Kepler) - European Research Council[267864] ; KASI[2012-1-410-02, 2013-9-400-00, 2014-1-400-06, 2015-1-850-04] ; Gemini-Conicyt Fund[32120036] ; Regione Campania from POR-FSE Campania ; Communaute francaise de Belgique - Actions de recherche concertees - Academie Wallonie-Europe
Language英语
Subject Area天文学 ; 天体物理学 ; 实测天体物理学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS IDWOS:000373586000059
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordTRANSITING EXTRASOLAR PLANETS ; STELLAR EVOLUTION DATABASE ; SPIN-ORBIT ALIGNMENT ; HOT JUPITER PLANET ; LIGHT-CURVE ; EXOPLANETARY SYSTEM ; PHYSICAL-PROPERTIES ; GIANT PLANETS ; STARSPOTS ; STAR
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9576
Collection系外行星研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorSouthworth, John
Affiliation1.Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK
2.NASA Ames Research Center, Moffett Field, CA 94035, USA
3.Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, DK-2100 Copenhagen Ø, Denmark
4.NASA Exoplanet Science Institute, MS 100-22, California Institute of Technology, Pasadena, CA 91125, USA
5.Dipartimento di Fisica ‘E.R. Caianiello’, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano (SA), Italy
6.Istituto Internazionale per gli Alti Studi Scientifici (IIASS), I-84019 Vietri Sul Mare (SA), Italy
7.Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany
8.Unidad de Astronomía, Facultad de Ciencias Básicas, Universidad de Antofagasta, Avenida U. de Antofagasta 02800, Antofagasta, Chile
9.SUPA, University of St Andrews, School of Physics and Astronomy, North Haugh, St Andrews KY16 9SS, UK
10.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
11.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
12.Korea Astronomy and Space Science Institute, Daejeon 305-348, Republic of Korea
13.Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Øster Voldgade 5, DK-1350 Copenhagen K, Denmark
14.INAF – Osservatorio Astrofisico di Torino, via Osservatorio 20, I-10025 Pino Torinese, Italy
15.Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
16.Centre of Electronic Imaging, Department of Physical Sciences, The Open University, Milton Keynes MK7 6AA, UK
17.Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
18.Institut d'Astrophysique et de Géophysique, Université de Liège, B-4000 Liège, Belgium
19.Qatar Environment and Energy Research Institute (QEERI), HBKU, Qatar Foundation, PO Box 5825, Doha, Qatar
20.Department of Astronomy, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA
21.Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, I-80126 Napoli, Italy
22.Universität Hamburg, Meteorologisches Institut, Bundesstraße 55, D-20146 Hamburg, Germany
23.Astronomisches Rechen-Institut, Zentrum für Astronomie, Universität Heidelberg, Mönchhofstraße 12-14, D-69120 Heidelberg, Germany
24.Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, D-21029 Hamburg, Germany
25.Dipartimento di Fisica e Astronomia, Università di Bologna, Viale Berti Pichat 6/2, I-40127 Bologna, Italy
26.Main Astronomical Observatory, Academy of Sciences of Ukraine, vul. Akademika Zabolotnoho 27, UA-03680 Kyiv, Ukraine
27.European Southern Observatory, Karl-Schwarzschild-Straße 2, D-85748 Garching bei München, Germany
28.Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
29.Jodrell Bank Centre for Astrophysics, University of Manchester, Oxford Road, Manchester M13 9PL, UK
30.Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Väisäläntie 20, FI-21500 Piikkiö, Finland
31.Department of Astronomy, Ohio State University, 140 W. 18th Ave, Columbus, OH 43210, USA
32.Department of Physics, Sharif University of Technology, P. O. Box 11155-9161 Tehran, Iran
33.Planetary and Space Sciences, Department of Physical Sciences, The Open University, Milton Keynes MK7 6AA, UK
34.Royal Society University Research Fellow.
Recommended Citation
GB/T 7714
Southworth, John,Tregloan-Reed, J.,Andersen, M. I.,et al. High-precision photometry by telescope defocussing - VIII. WASP-22, WASP-41, WASP-42 and WASP-55[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,457(4):4205-4217.
APA Southworth, John.,Tregloan-Reed, J..,Andersen, M. I..,Novati, S. Calchi.,Ciceri, S..,...&Wang, Y..(2016).High-precision photometry by telescope defocussing - VIII. WASP-22, WASP-41, WASP-42 and WASP-55.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,457(4),4205-4217.
MLA Southworth, John,et al."High-precision photometry by telescope defocussing - VIII. WASP-22, WASP-41, WASP-42 and WASP-55".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 457.4(2016):4205-4217.
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