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Retrieval of the dayside atmosphere of WASP-43b with CRIRES+

Lesjak, F. (author)
Georg August Univ, Inst Astrophys & Geophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany.
Nortmann, L. (author)
Georg August Univ, Inst Astrophys & Geophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany.
Yan, F. (author)
Univ Sci & Technol China, Dept Astron, 96 JinZhai Rd Baohe Dist, Hefei 230026, Peoples R China.
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Cont, D. (author)
Georg August Univ, Inst Astrophys & Geophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany.;Ludwig Maximilians Univ Munchen, Univ Sternwarte, Fak Phys, Scheinerstr 1, D-81679 Munich, Germany.;Exzellenzcluster ORIGINS, Boltzmannstr 2, D-85748 Garching, Germany.
Reiners, A. (author)
Georg August Univ, Inst Astrophys & Geophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany.
Piskunov, Nikolai, professor, 1957- (author)
Uppsala universitet,Institutionen för fysik och astronomi
Hatzes, A. (author)
Thuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany.
Boldt-Christmas, Linn (author)
Uppsala universitet,Institutionen för fysik och astronomi
Czesla, S. (author)
Thuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany.
Heiter, Ulrike (author)
Uppsala universitet,Institutionen för fysik och astronomi
Kochukhov, Oleg (author)
Uppsala universitet,Institutionen för fysik och astronomi
Lavail, Alexis (author)
Uppsala universitet,Institutionen för fysik och astronomi,Univ Toulouse, Inst Rech Astrophys & Planetol, CNRS, IRAP UMR 5277, 14 Ave Edouard Belin, F-31400 Toulouse, France.
Nagel, E. (author)
Georg August Univ, Inst Astrophys & Geophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany.;Thuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany.;Univ Hamburg, Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany.
Rains, Adam D. (author)
Uppsala universitet,Institutionen för fysik och astronomi
Rengel, M. (author)
Max Planck Inst Sonnensyst Forsch, Justus von Liebig Weg 3, D-37077 Gottingen, Germany.
Rodler, F. (author)
European Southern Observ, Alonso de Cordova 3107, Santiago 19001, Chile.
Seemann, U. (author)
Georg August Univ, Inst Astrophys & Geophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany.;European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany.
Shulyak, D. (author)
CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, Granada 18008, Spain.
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Georg August Univ, Inst Astrophys & Geophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany Univ Sci & Technol China, Dept Astron, 96 JinZhai Rd Baohe Dist, Hefei 230026, Peoples R China. (creator_code:org_t)
EDP Sciences, 2023
2023
English.
In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 678
Related links:
https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
https://urn.kb.se/re...
https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Accurately estimating the C/O ratio of hot Jupiter atmospheres is a promising pathway towards understanding planet formation and migration, as well as the formation of clouds and the overall atmospheric composition. The atmosphere of the hot Jupiter WASP-43b has been extensively analysed using low-resolution observations with HST and Spitzer, but these previous observations did not cover the K band, which hosts prominent spectral features of major carbon-bearing species such as CO and CH4. As a result, the ability to establish precise constraints on the C/O ratio was limited. Moreover, the planet has not been studied at high spectral resolution, which can provide insights into the atmospheric dynamics. In this study, we present the first high-resolution dayside spectra of WASP-43b with the new CRIRES+ spectrograph. By observing the planet in the K band, we successfully detected the presence of CO and provide evidence for the existence of H2O using the cross-correlation method. This discovery represents the first direct detection of CO in the atmosphere of WASP-43b. Furthermore, we retrieved the temperature-pressure profile, abundances of CO and H2O, and a super-solar C/O ratio of 0.78 by applying a Bayesian retrieval framework to the data. Our findings also shed light on the atmospheric characteristics of WASP-43b. We found no evidence for a cloud deck on the dayside, and recovered a line broadening indicative of an equatorial super-rotation corresponding to a jet with a wind speed of similar to 5kms(-1), matching the results of previous forward models and low-resolution atmospheric retrievals for this planet.

Subject headings

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)

Keyword

planets and satellites: atmospheres
techniques: spectroscopic
planets and satellites: individual: WASP-43b

Publication and Content Type

ref (subject category)
art (subject category)

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