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Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry
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; Fang, X. -S.11; Finet, F.12; Gerner, T.13; Hardis, S.14,15; Hinse, T. C.16; Jorgensen, U. G.14,15; Liebig, C.10; Nikolov, N.1,17; Ricci, D.12,18; Schaefer, S.19; Schoenebeck, F.13; Skottfelt, J.14,15; Wertz, O.12; Alsubai, K. A.20; Bozza, V.2,21; Browne, P.11; Dodds, P.10; Gu, S. -H.11,22; Harpsoe, K.14,15; Henning, Th.1; Hundertmark, M.10; Jessen-Hansen, J.23; Kains, N.24; Kerins, E.25; Kjeldsen, H.23; Lund, M. N.23; Lundkvist, M.23; Madhusudhan, N.26,27; Mathiasen, M.14,15; Penny, M. T.28; Prof, S.13; Rahvar, S.29; Sahu, K.30; Scarpetta, G.2,9,21; Snodgrass, C.31; Surdej, J.12
Corresponding Author Mancini, L (通讯作者)Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany.
AbstractWe 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.
KeywordTechniques: Photometric Stars: Fundamental Parameters Stars: Individual: Wasp-19 Planetary Systems Starspots
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000326435100025
Citation statistics
Cited Times:49[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.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
11.Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China
12.Univ Liege, Inst Astrophys & Geophys, B-4000 Liege, Belgium
13.Heidelberg Univ, Zentrum Astron, D-69120 Heidelberg, Germany
14.Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen O, Denmark
15.Geol Museum, Ctr Star & Planet Format, DK-1350 Copenhagen, Denmark
16.Korea Astron & Space Sci Inst, Taejon 305348, South Korea
17.Univ Exeter, Astrophys Grp, Exeter EX4 4QL, Devon, England
18.UNAM, Inst Astron, Ensenada 422860, Baja California, Mexico
19.Univ Gottingen, Inst Astrophys, D-37077 Gottingen, Germany
20.Qatar Fdn, Doha, Qatar
21.Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy
22.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China
23.Aarhus Univ, Dept Phys & Astron, Stellar Astrophys Ctr, DK-8000 Aarhus C, Denmark
24.European So Observ, D-85748 Garching, Germany
25.Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England
26.Yale Univ, Dept Phys, New Haven, CT 06511 USA
27.Yale Univ, Dept Astron, New Haven, CT 06511 USA
28.Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
29.Sharif Univ Technol, Dept Phys, Tehran, Iran
30.Space Telescope Sci Inst, Baltimore, MD 21218 USA
31.Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany
Recommended Citation
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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