Thermal structure of an exoplanet atmosphere from phase-resolved emission spectroscopy

Kevin B. Stevenson; Jean Michel Désert; Michael R. Line; Jacob L. Bean; Jonathan J. Fortney; Adam P. Showman; Tiffany Kataria; Laura Kreidberg; Peter R. McCullough; Gregory W. Henry; David Charbonneau; Adam S. Burrows; Sara Seager; Nikku Madhusudhan; Michael H. Williamson; Derek Homeier

doi:10.1126/science.1256758

Thermal structure of an exoplanet atmosphere from phase-resolved emission spectroscopy

Kevin B. Stevenson, Jean Michel Désert, Michael R. Line, Jacob L. Bean, Jonathan J. Fortney, Adam P. Showman, Tiffany Kataria, Laura Kreidberg, Peter R. McCullough, Gregory W. Henry, David Charbonneau, Adam S. Burrows, Sara Seager, Nikku Madhusudhan, Michael H. Williamson, Derek Homeier

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240 Scopus citations

Abstract

Exoplanets that orbit close to their host stars are much more highly irradiated than their solar system counterparts. Understanding the thermal structures and appearances of these planets requires investigating how their atmospheres respond to such extreme stellar forcing.We present spectroscopic thermal emission measurements as a function of orbital phase ("phase-curve observations") for the highly irradiated exoplanet WASP-43b spanning three full planet rotations using the Hubble Space Telescope. With these data, we construct a map of the planet's atmospheric thermal structure, from which we find large day-night temperature variations at all measured altitudes and a monotonically decreasing temperature with pressure at all longitudes.We also derive a Bond albedo of 0:180:07 -0:12 and an altitude dependence in the hot-spot offset relative to the substellar point.

Original language	English (US)
Pages (from-to)	838-841
Number of pages	4
Journal	Science
Volume	346
Issue number	6211
DOIs	https://doi.org/10.1126/science.1256758
State	Published - Nov 14 2014

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Stevenson, K. B., Désert, J. M., Line, M. R., Bean, J. L., Fortney, J. J., Showman, A. P., Kataria, T., Kreidberg, L., McCullough, P. R., Henry, G. W., Charbonneau, D., Burrows, A. S., Seager, S., Madhusudhan, N., Williamson, M. H., & Homeier, D. (2014). Thermal structure of an exoplanet atmosphere from phase-resolved emission spectroscopy. Science, 346(6211), 838-841. https://doi.org/10.1126/science.1256758

@article{fab8355f9aab4ab19ac39dee87cc244a,

title = "Thermal structure of an exoplanet atmosphere from phase-resolved emission spectroscopy",

abstract = "Exoplanets that orbit close to their host stars are much more highly irradiated than their solar system counterparts. Understanding the thermal structures and appearances of these planets requires investigating how their atmospheres respond to such extreme stellar forcing.We present spectroscopic thermal emission measurements as a function of orbital phase ({"}phase-curve observations{"}) for the highly irradiated exoplanet WASP-43b spanning three full planet rotations using the Hubble Space Telescope. With these data, we construct a map of the planet's atmospheric thermal structure, from which we find large day-night temperature variations at all measured altitudes and a monotonically decreasing temperature with pressure at all longitudes.We also derive a Bond albedo of 0:180:07 -0:12 and an altitude dependence in the hot-spot offset relative to the substellar point.",

author = "Stevenson, {Kevin B.} and D{\'e}sert, {Jean Michel} and Line, {Michael R.} and Bean, {Jacob L.} and Fortney, {Jonathan J.} and Showman, {Adam P.} and Tiffany Kataria and Laura Kreidberg and McCullough, {Peter R.} and Henry, {Gregory W.} and David Charbonneau and Burrows, {Adam S.} and Sara Seager and Nikku Madhusudhan and Williamson, {Michael H.} and Derek Homeier",

year = "2014",

month = nov,

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doi = "10.1126/science.1256758",

language = "English (US)",

volume = "346",

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journal = "Science",

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Stevenson, KB, Désert, JM, Line, MR, Bean, JL, Fortney, JJ, Showman, AP, Kataria, T, Kreidberg, L, McCullough, PR, Henry, GW, Charbonneau, D, Burrows, AS, Seager, S, Madhusudhan, N, Williamson, MH & Homeier, D 2014, 'Thermal structure of an exoplanet atmosphere from phase-resolved emission spectroscopy', Science, vol. 346, no. 6211, pp. 838-841. https://doi.org/10.1126/science.1256758

TY - JOUR

T1 - Thermal structure of an exoplanet atmosphere from phase-resolved emission spectroscopy

AU - Stevenson, Kevin B.

AU - Désert, Jean Michel

AU - Line, Michael R.

AU - Bean, Jacob L.

AU - Fortney, Jonathan J.

AU - Showman, Adam P.

AU - Kataria, Tiffany

AU - Kreidberg, Laura

AU - McCullough, Peter R.

AU - Henry, Gregory W.

AU - Charbonneau, David

AU - Burrows, Adam S.

AU - Seager, Sara

AU - Madhusudhan, Nikku

AU - Williamson, Michael H.

AU - Homeier, Derek

PY - 2014/11/14

Y1 - 2014/11/14

N2 - Exoplanets that orbit close to their host stars are much more highly irradiated than their solar system counterparts. Understanding the thermal structures and appearances of these planets requires investigating how their atmospheres respond to such extreme stellar forcing.We present spectroscopic thermal emission measurements as a function of orbital phase ("phase-curve observations") for the highly irradiated exoplanet WASP-43b spanning three full planet rotations using the Hubble Space Telescope. With these data, we construct a map of the planet's atmospheric thermal structure, from which we find large day-night temperature variations at all measured altitudes and a monotonically decreasing temperature with pressure at all longitudes.We also derive a Bond albedo of 0:180:07 -0:12 and an altitude dependence in the hot-spot offset relative to the substellar point.

AB - Exoplanets that orbit close to their host stars are much more highly irradiated than their solar system counterparts. Understanding the thermal structures and appearances of these planets requires investigating how their atmospheres respond to such extreme stellar forcing.We present spectroscopic thermal emission measurements as a function of orbital phase ("phase-curve observations") for the highly irradiated exoplanet WASP-43b spanning three full planet rotations using the Hubble Space Telescope. With these data, we construct a map of the planet's atmospheric thermal structure, from which we find large day-night temperature variations at all measured altitudes and a monotonically decreasing temperature with pressure at all longitudes.We also derive a Bond albedo of 0:180:07 -0:12 and an altitude dependence in the hot-spot offset relative to the substellar point.

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SP - 838

EP - 841

JO - Science

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Thermal structure of an exoplanet atmosphere from phase-resolved emission spectroscopy

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