A Detection of Water in the Transmission Spectrum of the Hot Jupiter WASP-12b and Implications for its Atmospheric Composition
Laura Kreidberg,Michael R. Line,Jacob L. Bean,Kevin B. Stevenson,Jean-Michel Desert,Nikku Madhusudhan,Jonathan J. Fortney,Joanna K. Barstow,Gregory W. Henry,Michael H. Williamson,Adam P. Showman +10 more
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In this article, a near-infrared transmission spectrum for WASP-12b based on six transit observations with the Hubble Space Telescope/Wide Field Camera 3 (HST-WFC) was reported.Abstract:
Detailed characterization of exoplanets has begun to yield measurements of their atmospheric properties that constrain the planets’ origins and evolution. For example, past observations of the dayside emission spectrum of the hot Jupiter WASP-12b indicated that its atmosphere has a high carbon-tooxygen ratio (C/O > 1), suggesting it had a dierent formation pathway than is commonly assumed for giant planets. Here we report a precise near-infrared transmission spectrum for WASP-12b based on six transit observations with the Hubble Space Telescope/Wide Field Camera 3. We bin the data in 13 spectrophotometric light curves from 0.84 - 1.67 m and measure the transit depths to a median precision of 51 ppm. We retrieve the atmospheric properties using the transmission spectrum and nd strong evidence for water absorption (7 condence). This detection marks the rst high-condence, spectroscopic identication of a molecule in the atmosphere of WASP-12b. The retrieved 1 water volume mixing ratio is between 10 5 10 2 , which is consistent with C/O > 1 to within 2 . However, we also introduce a new retrieval parameterization that ts for C/O and metallicity under the assumption of chemical equilibrium. With this approach, we constrain C/O to 0:5 +0:2 0:3 at 1 and rule out a carbon-rich atmosphere composition (C/O> 1) at > 3 condence. Further observations and modeling of the planet’s global thermal structure and dynamics would aid in resolving the tension between our inferred C/O and previous constraints. Our ndings highlight the importance of obtaining high-precision data with multiple observing techniques in order to obtain robust constraints on the chemistry and physics of exoplanet atmospheres. Subject headings: planets and satellites: atmospheres | planets and satellites: composition | planets and satellites: individual: WASP-12bread more
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Journal ArticleDOI
The Influence of Stellar Contamination on the Interpretation of Near Infrared Transmission Spectra of Sub-Neptune Worlds around M-Dwarfs
TL;DR: In this article, the impact of stellar surface heterogeneities in the form of cool spots and hot faculae on the spectrum of a transiting planet has been explored for the characterization of exoplanet atmospheres.
Proceedings ArticleDOI
The ExoGRAVITY project: using single mode interferometry to characterize exoplanets
Sylvestre Lacour,Sylvestre Lacour,Ji Wang,M. Nowak,Laurent Pueyo,Frank Eisenhauer,A.-M. Lagrange,A.-M. Lagrange,Paul Mollière,Roberto Abuter,A. Amorin,R. Asensio-Torres,M. Bauböck,Myriam Benisty,Jean-Philippe Berger,Hervé Beust,Sarah Blunt,Anthony Boccaletti,Alexander J. Bohn,Mickael Bonnefoy,H. Bonnet,Wolfgang Brandner,Faustine Cantalloube,Paola Caselli,Benjamin Charnay,Gael Chauvin,Elodie Choquet,Valentin Christiaens,Yann Clénet,A. Cridland,P. T. de Zeeuw,P. T. de Zeeuw,Roderick Dembet,Jason Dexter,A. Drescher,Gilles Duvert,Feng Gao,Paulo J. V. Garcia,R. Garcia Lopez,R. Garcia Lopez,Tyler Gardner,Eric Gendron,Reinhard Genzel,Stefan Gillessen,Julien Girard,Xavier Haubois,G. Heißel,Th. Henning,Sasha Hinkley,Stefan Hippler,Matthew Horrobin,M. Houllé,Z. Hubert,A. Jiménez-Rosales,Laurent Jocou,Jens Kammerer,Jens Kammerer,Miriam Keppler,Pierre Kervella,Laura Kreidberg,V. Lapeyrère,J.-B. Le Bouquin,Pierre Léna,Dieter Lutz,Anne-Lise Maire,Antoine Mérand,John D. Monnier,David Mouillet,André Müller,E. Nasedkin,Thomas Ott,Gilles Otten,Claudia Paladini,Thibaut Paumard,Karine Perraut,Guy Perrin,O. Pfuhl,J. Rameau,L. Rodet,G. Rodríguez-Coira,Gérard Rousset,Jinyi Shangguan,T. Taro Shimizu,Julia Stadler,Odele Straub,Christian Straubmeier,Eckhard Sturm,Tomas Stolker,E. F. van Dishoeck,E. F. van Dishoeck,Arthur Vigan,F. Vincent,S. D. von Fellenberg,K. Ward-Duong,Felix Widmann,Ekkehard Wieprecht,Erich Wiezorrek,Julien Woillez +97 more
TL;DR: The ExoGRAVITY project as discussed by the authors is a survey of known young giant exoplanets located in the range of 0.1" to 2" from their stars, where adaptive optics and interferometric observations results in a considerable contrast gain compared to single-telescope, extreme AO systems.
Transmission Spectroscopy of WASP-79b from 0.6 to 5.0 microns
K. S. Sotzen,Kevin B. Stevenson,David K. Sing,Brian Kilpatrick,Hannah R. Wakeford,Joseph C. Filippazzo,Nikole K. Lewis,Sarah M. Hörst,M. Lopez-Morales,Gregory W. Henry,Lars A. Buchhave,David Ehrenreich,Jonathan Fraine,A. García Muñoz,Rahul Jayaraman,Panayotis Lavvas,A. Lecavelier des Etangs,Mark S. Marley,N. Nikolov,A. Rathcke,Jorge Sanz-Forcada +20 more
TL;DR: In this paper, a spectroscopic study of WASP-79b, an inflated hot Jupiter orbiting an F-type star in Eridanus with a period of 3.66 days, was conducted.
Journal ArticleDOI
CO or no CO? Narrowing the CO abundance constraint and recovering the H2O detection in the atmosphere of WASP-127 b using SPIRou
Anne Boucher,David Lafrenière,Stefan Pelletier,A. Darveau-Bernier,Michael Radica,Romain Allart,Étienne Artigau,Neil Cook,Florian Debras,René Doyon,Eric Gaidos,Björn Benneke,Charles Cadieux,Andres Carmona,Ryan Cloutier,P. Cort'es-Zuleta,Nicolas B. Cowan,Xavier Delfosse,Jean-François Donati,P. Fouqu'e,T. Forveille,K. N. Grankin,G. H'ebrard,J. H. C. Martins,Eder Martioli,Adrien Masson,Sandrine Vinatier +26 more
TL;DR: In this article , the authors present near-infrared (0.9-2.5μm) transit observations of WASP-127 b using the high-resolution SPIRou spectrograph, with the goal to disentangle CO from CO2 through the 2.3-μm CO band.
Proceedings ArticleDOI
The ExoGRAVITY project: using single mode interferometry to characterize exoplanets
Sylvestre Lacour,Ji Wang,M. Nowak,Laurent Pueyo,Frank Eisenhauer,Anne-Marie Lagrange,Paul Mollière,R. Abuter,António Amorim,R. Asensio-Torres,M. Bauböck,Myriam Benisty,Jean-Philippe Berger,H. Beust,Sarah Blunt,A. Boccaletti,Alexander J. Bohn,M. Bonnefoy,H. Bonnet,Wolfgang Brandner,Faustine Cantalloube,Paola Caselli,Benjamin Charnay,G. Chauvin,Elodie Choquet,Valentin Christiaens,Yann Clénet,A. Cridland,P. T. de Zeeuw,Roderick Dembet,Jason Dexter,A. Drescher,Gilles Duvert,Feng Gao,Paulo J. V. Garcia,R. J. García López,Tyler Gardner,Eric Gendron,Reinhard Genzel,Stefan Gillessen,Julien Girard,Xavier Haubois,G. Heissel,Th. Henning,Sasha Hinkley,Stefan Hippler,Matthew Horrobin,M. Houllé,Z. Hubert,A. Jiménez-Rosales,Laurent Jocou,Jens Kammerer,Miriam Keppler,Pierre Kervella,Laura Kreidberg,Vincent Lapeyrere,J.-B. Le Bouquin,Pierre Léna,D. Lutz,Anne-Lise Maire,A. Mérand,John D. Monnier,David Mouillet,André Müller,E. Nasedkin,Thomas Ott,Gilles Otten,Claudia Paladini,Thibaut Paumard,Karine Perraut,Guy Perrin,O. Pfuhl,J. Rameau,L. Rodet,G. Rodríguez-Coira,G. Rousset,Jinyi Shangguan,T. Taro Shimizu,Julia Stadler,Odele Straub,Christian Straubmeier,Eckhard Sturm,Tomas Stolker,E. F. van Dishoeck,Arthur Vigan,F. H. Vincent,S. D. von Fellenberg,K. Ward-Duong,Felix Widmann,Ekkehard Wieprecht,Erich Wiezorrek,Julien Woillez +91 more
TL;DR: The ExoGRAVITY project as discussed by the authors is a survey of known young giant exoplanets located in the range of 0.1'' to 2'' from their stars.
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