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Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multiband photometry

Ciceri, S. and Calchi Novati, S. and Elyiv, A. and Surdej, J. and Wertz, O. (2016) Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multiband photometry. Monthly Notices of the Royal Astronomical Society, 456 (1). pp. 990-1002. ISSN 0035-8711.

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Accurate measurements of the physical characteristics of a large number of exoplanets are useful to strongly constrain theoretical models of planet formation and evolution, which lead to the large variety of exoplanets and planetary-system configurations that have been observed. We present a study of the planetary systems WASP-45 and WASP-46, both composed of a main-sequence star and a close-in hot Jupiter, based on 29 new high-quality light curves of transits events. In particular, one transit of WASP-45 b and four of WASP-46 b were simultaneously observed in four optical filters, while one transit of WASP-46 b was observed with the NTT obtaining a precision of 0.30 mmag with a cadence of roughly 3 min. We also obtained five new spectra of WASP-45 with the FEROS spectrograph. We improved by a factor of 4 the measurement of the radius of the planet WASP-45 b, and found that WASP-46 b is slightly less massive and smaller than previously reported. Both planets now have a more accurate measurement of the density (0.959 ± 0.077 ρ_(Jup) instead of 0.64 ± 0.30 ρ_(Jup) for WASP-45 b, and 1.103 ± 0.052 ρ_(Jup) instead of 0.94 ± 0.11 ρ_(Jup) for WASP-46 b). We tentatively detected radius variations with wavelength for both planets, in particular in the case of WASP-45 b we found a slightly larger absorption in the redder bands than in the bluer ones. No hints for the presence of an additional planetary companion in the two systems were found either from the photometric or radial velocity measurements.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Calchi Novati, S.0000-0002-7669-1069
Surdej, J.0000-0002-7005-1976
Wertz, O.0000-0003-3849-2285
Additional Information:© 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2015 November 16. Received 2015 November 11. In original form 2015 July 13. First published online December 18, 2015. Based on data collected by the MiNDSTEp collaboration with the Danish 1.54 m telescope, and on data observed with the NTT (under program number 088.C-0204(A)), 2.2 m and Euler-Swiss Telescope all located at the ESO La Silla Observatory.We acknowledge the use of the NASA Astrophysics Data System; the SIMBAD data base operated at CDS, Strasbourg, France; and the arXiv scientific paper preprint service operated by Cornell University. This work was supported by KASI (Korea Astronomy and Space Science Institute) grants 2012-1-410-02 and 2013-9-400-00. ASB acknowledges support from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement number 313014 (ETAEARTH). TCH acknowledges financial support from the Korea Research Council for Fundamental Science and Technology (KRCF) through the Young Research Scientist Fellowship Program. YD, AE, JSurdej and OW acknowledge support from the Communauté française de Belgique – Actions de recherche concertées – Académie Wallonie-Europe. SHG and XBW would like to thank the financial support from National Natural Science Foundation of China through grants nos. 10873031 and 11473066. SC thanks G-D. Marleau for useful discussion and comments, the staff and astronomers observing at the ESO La Silla observatory during January and February 2015 for the great, friendly and scientifically stimulating environment.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Korea Astronomy and Space Science Institute (KASI)2012-1-410-02
Korea Astronomy and Space Science Institute (KASI)2013-9-400-00
European Research Council (ERC)313014 (ETAEARTH)
Korea Research Council for Fundamental Science and TechnologyUNSPECIFIED
National Natural Science Foundation of China10873031
National Natural Science Foundation of China11473066
Subject Keywords:planets and satellites: fundamental parameters stars: fundamental parameters stars: individual: WASP-45 stars: individual: WASP-46
Issue or Number:1
Record Number:CaltechAUTHORS:20160205-083244924
Persistent URL:
Official Citation:S. Ciceri, L. Mancini, J. Southworth, M. Lendl, J. Tregloan-Reed, R. Brahm, G. Chen, G. D'Ago, M. Dominik, R. Figuera Jaimes, P. Galianni, K. Harpsøe, T. C. Hinse, U. G. Jørgensen, D. Juncher, H. Korhonen, C. Liebig, M. Rabus, A. S. Bonomo, K. Bott, Th. Henning, A. Jordán, A. Sozzetti, K. A. Alsubai, J. M. Andersen, D. Bajek, V. Bozza, D. M. Bramich, P. Browne, S. Calchi Novati, Y. Damerdji, C. Diehl, A. Elyiv, E. Giannini, S-H. Gu, M. Hundertmark, N. Kains, M. Penny, A. Popovas, S. Rahvar, G. Scarpetta, R. W. Schmidt, J. Skottfelt, C. Snodgrass, J. Surdej, C. Vilela, X.-B. Wang, and O. Wertz Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multiband photometry MNRAS (February 11, 2016) Vol. 456 990-1002 doi:10.1093/mnras/stv2698 First published online December 18, 2015
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:64264
Deposited By: Ruth Sustaita
Deposited On:05 Feb 2016 17:46
Last Modified:14 Oct 2019 23:17

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