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

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

Research output: Contribution to journalArticle

31 Citations (Scopus)

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.

Original languageEnglish (US)
JournalAstronomy and Astrophysics
Volume513
Issue number2
DOIs
StatePublished - Apr 14 2010
Externally publishedYes

Fingerprint

thermal emission
planets
planet
occultation
atmospheres
stars
atmosphere
brightness temperature
extrasolar planets
Jupiter (planet)
Jupiter
night
irradiation
flux density
orbitals
energy

Keywords

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

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Anderson, D. R., Gillon, M., Maxted, P. F. L., Barman, T. S., Collier Cameron, A., Hellier, C., ... Triaud, A. H. M. J. (2010). H-band thermal emission from the 19-h period planet WASP-19b. Astronomy and Astrophysics, 513(2). https://doi.org/10.1051/0004-6361/201014226

H-band thermal emission from the 19-h period planet WASP-19b. / Anderson, D. R.; Gillon, M.; Maxted, P. F L; Barman, Travis S; Collier Cameron, A.; Hellier, C.; Queloz, D.; Smalley, B.; Triaud, A. H M J.

In: Astronomy and Astrophysics, Vol. 513, No. 2, 14.04.2010.

Research output: Contribution to journalArticle

Anderson, DR, Gillon, M, Maxted, PFL, Barman, TS, Collier Cameron, A, Hellier, C, Queloz, D, Smalley, B & Triaud, AHMJ 2010, 'H-band thermal emission from the 19-h period planet WASP-19b', Astronomy and Astrophysics, vol. 513, no. 2. https://doi.org/10.1051/0004-6361/201014226
Anderson DR, Gillon M, Maxted PFL, Barman TS, Collier Cameron A, Hellier C et al. H-band thermal emission from the 19-h period planet WASP-19b. Astronomy and Astrophysics. 2010 Apr 14;513(2). https://doi.org/10.1051/0004-6361/201014226
Anderson, D. R. ; Gillon, M. ; Maxted, P. F L ; Barman, Travis S ; Collier Cameron, A. ; Hellier, C. ; Queloz, D. ; Smalley, B. ; Triaud, A. H M J. / H-band thermal emission from the 19-h period planet WASP-19b. In: Astronomy and Astrophysics. 2010 ; Vol. 513, No. 2.
@article{13f2e7c58ee64552bd2221bdb2501a58,
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, {Travis S} and {Collier Cameron}, A. and C. Hellier and D. Queloz and B. Smalley and Triaud, {A. H M J}",
year = "2010",
month = "4",
day = "14",
doi = "10.1051/0004-6361/201014226",
language = "English (US)",
volume = "513",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",
number = "2",

}

TY - JOUR

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, Travis 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

UR - http://www.scopus.com/inward/record.url?scp=77952986087&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77952986087&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201014226

DO - 10.1051/0004-6361/201014226

M3 - Article

VL - 513

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

IS - 2

ER -