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

Ciceri, S.; Mancini, L.; Southworth, J.; Lendl, M.; Tregloan-Reed, J.; Brahm, R.; Chen, G.; D'Ago, G.; Dominik, M.; Figuera Jaimes, R.; Galianni, P.; Harpsøe, K.; Hinse, T.C.; Jørgensen, U.G.; Juncher, D.; Korhonen, H.; Liebig, C.; Rabus, M.; Bonomo, A.S.; Bott, K.; Henning, Th.; Jordán, A.; Sozzetti, A.; Alsubai, K.A.; Andersen, J.M.; Bajek, D.; Bozza, V.; Bramich, D.M.; Browne, P.; Calchi Novati, S.; Damerdji, Y.; Diehl, C.; Elyiv, A.; Giannini, E.; Gu, S-H.; Hundertmark, M.; Kains, N.; Penny, M.; Popovas, A.; Rahvar, S.; Scarpetta, G.; Schmidt, R.W.; Skottfelt, J.; Snodgrass, C.; Surdej, J.; Vilela, C.; Wang, X.-B.; Wertz, O.

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


S. Ciceri

L. Mancini

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

O. Wertz


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??Jup instead of 0.64 ± 0.30??Jup for WASP-45 b, and 1.103 ± 0.052??Jup instead of 0.94 ± 0.11??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.


Ciceri, S., Mancini, L., Southworth, J., Lendl, M., Tregloan-Reed, J., Brahm, R., …Wertz, O. (2016). Physical properties of the planetary systemsWASP-45 and WASP-46 from simultaneous multiband photometry. Monthly Notices of the Royal Astronomical Society, 456(1), 990 -1002.

Journal Article Type Article
Acceptance Date Nov 16, 2015
Online Publication Date Dec 18, 2015
Publication Date Feb 11, 2016
Publicly Available Date May 26, 2023
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 456
Issue 1
Pages 990 -1002
Keywords astrophysics, planets and satellites, fundamental parameters, stars, individual, WASP-45, WASP-46
Publisher URL


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