Thermal emission at 3.6-8 $m from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star

D.~R. Anderson; A.~M.~S. Smith; N. Madhusudhan; P.~J. Wheatley; A. Collier Cameron; C. Hellier; C. Campo; M. Gillon; J. Harrington; P.~F.~L. Maxted; D. Pollacco; D. Queloz; B. Smalley; A.~H.~M.~J. Triaud; R.~G. West

doi:10.1093/mnras/stt140

Thermal emission at 3.6-8 $m from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star

D.~R. Anderson, A.~M.~S. Smith, N. Madhusudhan, P.~J. Wheatley, A. Collier Cameron, C. Hellier, C. Campo, M. Gillon, J. Harrington, P.~F.~L. Maxted, D. Pollacco, D. Queloz, B. Smalley, A.~H.~M.~J. Triaud, R.~G. West

Physics and Astronomy

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36 Citations (Scopus)

Abstract

We report detection of thermal emission from the exoplanet WASP-19b at 3.6, 4.5, 5.8 and 8.0 $m. We used the InfraRed Array Camera on the Spitzer Space Telescope to observe two occultations of WASP-19b by its host star. We combine our new detections with previous measurements of WASP-19b's emission at 1.6 and 2.09 $m to construct a spectral energy distribution of the planet's dayside atmosphere. By comparing this with model-atmosphere spectra, we find that the dayside atmosphere of WASP-19b lacks a strong temperature inversion. As WASP-19 is an active star (log R'$_HK$ = -4.50 plusmn 0.03), this finding supports the hypothesis of Knutson, Howard and Isaacson that inversions are suppressed in hot Jupiters orbiting active stars. The available data are unable to differentiate between a carbon-rich and an oxygen-rich atmosphere.

Original language	English
Pages (from-to)	3422-3431
Number of pages	10
Journal	Royal Astronomical Society. Monthly Notices
Volume	430
DOIs	https://doi.org/10.1093/mnras/stt140
Publication status	Published - 1 Apr 2013

Keywords

methods: data analysis, techniques: photometric, occultations, planets and satellites: atmospheres, planets and satellites: individual: WASP-19b, stars: individual: WASP-19

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10.1093/mnras/stt140

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Anderson, D. R., Smith, A. M. S., Madhusudhan, N., Wheatley, P. J., Collier Cameron, A., Hellier, C., Campo, C., Gillon, M., Harrington, J., Maxted, P. F. L., Pollacco, D., Queloz, D., Smalley, B., Triaud, A. H. M. J., & West, R. G. (2013). Thermal emission at 3.6-8 $m from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star. Royal Astronomical Society. Monthly Notices, 430, 3422-3431. https://doi.org/10.1093/mnras/stt140

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title = "Thermal emission at 3.6-8 $m from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star",

abstract = "We report detection of thermal emission from the exoplanet WASP-19b at 3.6, 4.5, 5.8 and 8.0 $m. We used the InfraRed Array Camera on the Spitzer Space Telescope to observe two occultations of WASP-19b by its host star. We combine our new detections with previous measurements of WASP-19b's emission at 1.6 and 2.09 $m to construct a spectral energy distribution of the planet's dayside atmosphere. By comparing this with model-atmosphere spectra, we find that the dayside atmosphere of WASP-19b lacks a strong temperature inversion. As WASP-19 is an active star (log R'$_HK$ = -4.50 plusmn 0.03), this finding supports the hypothesis of Knutson, Howard and Isaacson that inversions are suppressed in hot Jupiters orbiting active stars. The available data are unable to differentiate between a carbon-rich and an oxygen-rich atmosphere. ",

keywords = "methods: data analysis, techniques: photometric, occultations, planets and satellites: atmospheres, planets and satellites: individual: WASP-19b, stars: individual: WASP-19",

author = "D.~R. Anderson and A.~M.~S. Smith and N. Madhusudhan and P.~J. Wheatley and {Collier Cameron}, A. and C. Hellier and C. Campo and M. Gillon and J. Harrington and P.~F.~L. Maxted and D. Pollacco and D. Queloz and B. Smalley and A.~H.~M.~J. Triaud and R.~G. West",

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doi = "10.1093/mnras/stt140",

language = "English",

volume = "430",

pages = "3422--3431",

journal = "Royal Astronomical Society. Monthly Notices",

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Anderson, DR, Smith, AMS, Madhusudhan, N, Wheatley, PJ, Collier Cameron, A, Hellier, C, Campo, C, Gillon, M, Harrington, J, Maxted, PFL, Pollacco, D, Queloz, D, Smalley, B, Triaud, AHMJ & West, RG 2013, 'Thermal emission at 3.6-8 $m from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star', Royal Astronomical Society. Monthly Notices, vol. 430, pp. 3422-3431. https://doi.org/10.1093/mnras/stt140

TY - JOUR

T1 - Thermal emission at 3.6-8 $m from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star

AU - Anderson, D.~R.

AU - Smith, A.~M.~S.

AU - Madhusudhan, N.

AU - Wheatley, P.~J.

AU - Collier Cameron, A.

AU - Hellier, C.

AU - Campo, C.

AU - Gillon, M.

AU - Harrington, J.

AU - Maxted, P.~F.~L.

AU - Pollacco, D.

AU - Queloz, D.

AU - Smalley, B.

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

AU - West, R.~G.

PY - 2013/4/1

Y1 - 2013/4/1

N2 - We report detection of thermal emission from the exoplanet WASP-19b at 3.6, 4.5, 5.8 and 8.0 $m. We used the InfraRed Array Camera on the Spitzer Space Telescope to observe two occultations of WASP-19b by its host star. We combine our new detections with previous measurements of WASP-19b's emission at 1.6 and 2.09 $m to construct a spectral energy distribution of the planet's dayside atmosphere. By comparing this with model-atmosphere spectra, we find that the dayside atmosphere of WASP-19b lacks a strong temperature inversion. As WASP-19 is an active star (log R'$_HK$ = -4.50 plusmn 0.03), this finding supports the hypothesis of Knutson, Howard and Isaacson that inversions are suppressed in hot Jupiters orbiting active stars. The available data are unable to differentiate between a carbon-rich and an oxygen-rich atmosphere.

AB - We report detection of thermal emission from the exoplanet WASP-19b at 3.6, 4.5, 5.8 and 8.0 $m. We used the InfraRed Array Camera on the Spitzer Space Telescope to observe two occultations of WASP-19b by its host star. We combine our new detections with previous measurements of WASP-19b's emission at 1.6 and 2.09 $m to construct a spectral energy distribution of the planet's dayside atmosphere. By comparing this with model-atmosphere spectra, we find that the dayside atmosphere of WASP-19b lacks a strong temperature inversion. As WASP-19 is an active star (log R'$_HK$ = -4.50 plusmn 0.03), this finding supports the hypothesis of Knutson, Howard and Isaacson that inversions are suppressed in hot Jupiters orbiting active stars. The available data are unable to differentiate between a carbon-rich and an oxygen-rich atmosphere.

KW - methods: data analysis, techniques: photometric, occultations, planets and satellites: atmospheres, planets and satellites: individual: WASP-19b, stars: individual: WASP-19

U2 - 10.1093/mnras/stt140

DO - 10.1093/mnras/stt140

M3 - Article

SN - 0035-8711

VL - 430

SP - 3422

EP - 3431

JO - Royal Astronomical Society. Monthly Notices

JF - Royal Astronomical Society. Monthly Notices

ER -

Thermal emission at 3.6-8 $m from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star

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Keywords

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