Reference : H-band thermal emission from the 19-h period planet WASP-19b
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/60745
H-band thermal emission from the 19-h period planet WASP-19b
English
Anderson, D. R. [Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK]
Gillon, Michaël mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Maxted, P. F. L. [Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK]
Barman, T. S. [Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001, USA]
Collier Cameron, A. [School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife KY16 9SS, UK]
Hellier, C. [Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK]
Queloz, D. [Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland]
Smalley, B. [Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK]
Triaud, A H M J [Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland]
1-Apr-2010
Astronomy and Astrophysics
513
L3
Yes
International
[en] planets and satellites: atmospheres ; planetary systems ; stars: individual: WASP-19b ; techniques: photometric
[en] We present the first ground-based detection of thermal emission from an exoplanet in the H-band. Using HAWK-I on the VLT, we observed an occultation of WASP-19b by its G8V-type host star. WASP-19b is a Jupiter-mass planet with an orbital period of only 19 h, and thus, being highly irradiated, is expected to be hot. We measure an H-band occultation depth of 0.259[SUP]+0.046[/SUP][SUB]-0.044[/SUB]%, which corresponds to an H-band brightness temperature of T[SUB]H[/SUB] = 2580 ± 125 K. A cloud-free model of the planet's atmosphere, with no redistribution of energy from day-side to night-side, under predicts the planet/star flux density ratio by a factor of two. As the stellar parameters, and thus the level of planetary irradiation, are well-constrained by measurement, it is likely that our model of the planet's atmosphere is too simple. Based on data collected with the VLT/HAWKI instrument at ESO Paranal Observatory, Chile (programs 083.C-0377(A)).The photometric time-series used in this work are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via <A href="http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/513/L3">http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/513/L3</A>
http://hdl.handle.net/2268/60745
10.1051/0004-6361/201014226
http://adsabs.harvard.edu/abs/2010A%26A...513L...3A
http://de.arxiv.org/abs/1002.1947

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