H-band thermal emission from the 19-h period planet WASP-19b

D. R. Anderson; M. Gillon; P. F.L. Maxted; T. S. Barman; A. Collier Cameron; C. Hellier; D. Queloz; B. Smalley; A. H.M.J. Triaud

doi:10.1051/0004-6361/201014226

H-band thermal emission from the 19-h period planet WASP-19b

D. R. Anderson
, M. Gillon
, P. F.L. Maxted
, T. S. Barman
, A. Collier Cameron
, C. Hellier
, D. Queloz
, B. Smalley
, A. H.M.J. Triaud

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

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^+0.046 _-0.044, which corresponds to an H-band brightness temperature of T_H = 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.

Original language	English (US)
Article number	L3
Journal	Astronomy and astrophysics
Volume	513
Issue number	2
DOIs	https://doi.org/10.1051/0004-6361/201014226
State	Published - Apr 14 2010
Externally published	Yes

Keywords

Planetary systems
Planets and satellites: atmospheres
Stars: individual: WASP-19b
Techniques: photometric

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1051/0004-6361/201014226

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title = "H-band thermal emission from the 19-h period planet WASP-19b",

abstract = "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+0.046 -0.044, which corresponds to an H-band brightness temperature of TH = 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.",

keywords = "Planetary systems, Planets and satellites: atmospheres, Stars: individual: WASP-19b, Techniques: photometric",

author = "Anderson, \{D. R.\} and M. Gillon and Maxted, \{P. F.L.\} and Barman, \{T. S.\} and \{Collier Cameron\}, A. and C. Hellier and D. Queloz and B. Smalley and Triaud, \{A. H.M.J.\}",

year = "2010",

month = apr,

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doi = "10.1051/0004-6361/201014226",

language = "English (US)",

volume = "513",

journal = "Astronomy and astrophysics",

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T1 - H-band thermal emission from the 19-h period planet WASP-19b

AU - Anderson, D. R.

AU - Gillon, M.

AU - Maxted, P. F.L.

AU - Barman, T. S.

AU - Collier Cameron, A.

AU - Hellier, C.

AU - Queloz, D.

AU - Smalley, B.

AU - Triaud, A. H.M.J.

PY - 2010/4/14

Y1 - 2010/4/14

N2 - 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+0.046 -0.044, which corresponds to an H-band brightness temperature of TH = 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.

AB - 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+0.046 -0.044, which corresponds to an H-band brightness temperature of TH = 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.

KW - Planetary systems

KW - Planets and satellites: atmospheres

KW - Stars: individual: WASP-19b

KW - Techniques: photometric

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UR - https://www.scopus.com/pages/publications/77952986087#tab=citedBy

U2 - 10.1051/0004-6361/201014226

DO - 10.1051/0004-6361/201014226

M3 - Article

AN - SCOPUS:77952986087

SN - 0004-6361

VL - 513

JO - Astronomy and astrophysics

JF - Astronomy and astrophysics

IS - 2

M1 - L3

ER -

H-band thermal emission from the 19-h period planet WASP-19b

Abstract

Keywords

ASJC Scopus subject areas

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