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
Reads0
Chats0
TLDR
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
Citations
More filters
Journal ArticleDOI
The hubble PanCET program: A metal-rich atmosphere for the inflated hot jupiter HAT-P-41b
Kyle Sheppard,Luis Welbanks,Avi Mandell,Nikku Madhusudhan,Nikolay Nikolov,Drake Deming,Gregory W. Henry,Michael H. Williamson,David K. Sing,Mercedes Lopez-Morales,Jegug Ih,Jorge Sanz-Forcada,Panayotis Lavvas,Gilda E. Ballester,Thomas M. Evans,Antonio García Muñoz,Leonardo A. dos Santos +16 more
TL;DR: In this article, the authors presented a comprehensive analysis of the 0.3-5 µm transit spectrum for the inflated hot Jupiter HAT-P-41b. The planet was observed in transit with Hubble STIS and WFC3 as part of the Hubble Panchromatic Comparative Exoplanet Treasury (PanCET) program, and they combined those data with warm Spitzer transit observations.
Journal ArticleDOI
Ocean signatures in the total flux and polarization spectra of Earth-like exoplanets
V.J.H. Trees,Daphne Stam +1 more
TL;DR: In this paper , the authors explore signatures of water oceans in the flux and polarization spectra of this reflected light, and compute the total F , polarized ε Q , and degree of polarization P s of starlight re-ected by dry and ocean model planets with Earth-like atmospheres and patchy clouds.
Journal ArticleDOI
Distinguishing the albedo of exoplanets from stellar activity
L. M. Serrano,S. C. C. Barros,Mahmoudreza Oshagh,Mahmoudreza Oshagh,Nuno C. Santos,João P. Faria,Olivier Demangeon,S. G. Sousa,Monika Lendl +8 more
TL;DR: In this paper, the authors analyzed the limitations imposed by stellar activity on the detection of the planetary albedo, considering the predicted level of instrumental noise and the short duration of the observations planned in the context of the CHEOPS mission.
Journal ArticleDOI
Confirmation and characterisation of three giant planets detected by TESS from the FIES/NOT and Tull/McDonald spectrographs
Emil Knudstrup,L. M. Serrano,Davide Gandolfi,Steven H. Albrecht,William D. Cochran,M. Endl,Phillip J. MacQueen,René Tronsgaard,Allyson Bieryla,Lars A. Buchhave,Keivan G. Stassun,Karen A. Collins,Grzegorz Nowak,Hans J. Deeg,Khalid Barkaoui,Boris Safonov,I. Strakhov,A. Belinski,Joseph D. Twicken,J. M. Jenkins,Andrew W. Howard,Howard Isaacson,Joshua N. Winn,Kevin Collins,Dennis M. Conti,G. Furesz,Tian Gan,John F. Kielkopf,Bob Massey,Felipe Murgas,Lin G. Murphy,Enric Palle,Samuel N. Quinn,Phillip A. Reed,George R. Ricker,Sara Seager,Bernie Shiao,R. Schwarz,Gregor Srdoc,D. Watanabe +39 more
TL;DR: In this paper , the authors report the confirmation and characterisation of TOI-1820 b, TOI2025 b, and TOI2158 b, three Jupiter-sized planets on short-period orbits around G-type stars detected by TESS .
Journal ArticleDOI
Planet Hunters TESS III: two transiting planets around the bright G dwarf HD 152843
Nora L. Eisner,Belinda A. Nicholson,Belinda A. Nicholson,Oscar Barragán,Suzanne Aigrain,Chris Lintott,L. Kaye,Baptiste Klein,Grant Miller,James E. Taylor,N. Zicher,Lars A. Buchhave,D. A. Caldwell,Jonathan Horner,Joe Llama,Annelies Mortier,Vinesh M. Rajpaul,Keivan G. Stassun,A. Sporer,Andrew Tkachenko,Jon M. Jenkins,D. W. Latham,George R. Ricker,Sara Seager,Joshua N. Winn,S. Alhassan,Elisabeth Baeten,S. J. Bean,D. M. Bundy,V. Efremov,R. Ferstenou,B. L. Goodwin,M. Hof,T. Hoffman,A. Hubert,L. Lau,S. Lee,D. Maetschke,K. Peltsch,K. Peltsch,C. Rubio-Alfaro,G. M. Wilson +41 more
TL;DR: In this article, a two-planet system around a bright (V = 8.85 mag) early G dwarf (1.43 ) was discovered and validated using data from NASA's Transiting Exoplanet Survey Satellite (TESS).
References
More filters
Journal ArticleDOI
emcee: The MCMC Hammer
TL;DR: The emcee algorithm as mentioned in this paper is a Python implementation of the affine-invariant ensemble sampler for Markov chain Monte Carlo (MCMC) proposed by Goodman & Weare (2010).
Journal ArticleDOI
The Chemical Composition of the Sun
TL;DR: The solar chemical composition is an important ingredient in our understanding of the formation, structure, and evolution of both the Sun and our Solar System as discussed by the authors, and it is an essential refer...
Journal ArticleDOI
emcee: The MCMC Hammer
TL;DR: This document introduces a stable, well tested Python implementation of the affine-invariant ensemble sampler for Markov chain Monte Carlo (MCMC) proposed by Goodman & Weare (2010).
Journal ArticleDOI
Analytic Lightcurves for Planetary Transit Searches
Kaisey S. Mandel,Eric Agol +1 more
TL;DR: In this paper, exact analytic formulae for the eclipse of a star described by quadratic or nonlinear limb darkening are presented for the HST observations of HD 209458, showing that the ratio of the planetary to stellar radii is 0.1207+-0.0003.
Journal ArticleDOI
Analytic Light Curves for Planetary Transit Searches
Kaisey S. Mandel,Eric Agol +1 more
TL;DR: In this paper, the exact analytic formulae for the eclipse of a star described by quadratic or nonlinear limb darkening were presented, and the authors applied these results to the Hubble Space Telescope observations of HD 209458, showing that the ratio of the planetary to stellar radii is 0.1207 ± 0.0003.
Related Papers (5)
A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
David K. Sing,Jonathan J. Fortney,Nikolay Nikolov,Hannah R. Wakeford,Tiffany Kataria,Thomas M. Evans,Suzanne Aigrain,Gilda E. Ballester,Adam Burrows,Drake Deming,Jean-Michel Desert,Neale P. Gibson,Gregory W. Henry,Catherine M. Huitson,Heather Knutson,Alain Lecavelier des Etangs,Frederic Pont,Adam P. Showman,Alfred Vidal-Madjar,Michael H. Williamson,Paul Wilson +20 more
INFRARED TRANSMISSION SPECTROSCOPY OF THE EXOPLANETS HD 209458b AND XO-1b USING THE WIDE FIELD CAMERA-3 ON THE HUBBLE SPACE TELESCOPE
Drake Deming,Drake Deming,A. Wilkins,Peter R. McCullough,Adam Burrows,Jonathan J. Fortney,Eric Agol,Eric Agol,Ian Dobbs-Dixon,Ian Dobbs-Dixon,Nikku Madhusudhan,Nicolas Crouzet,Jean-Michel Desert,Ronald L. Gilliland,Korey Haynes,Korey Haynes,Heather Knutson,Michael R. Line,Zazralt Magic,Avi Mandell,Sukrit Ranjan,David Charbonneau,Mark Clampin,Sara Seager,Adam P. Showman +24 more
Infrared Transmission Spectroscopy of the Exoplanets HD209458b and XO-1b Using the Wide Field Camera-3 on the Hubble Space Telescope
Drake Deming,Ashlee Wilkins,Peter R. McCullough,Adam Burrows,Jonathan J. Fortney,Eric Agol,Ian Dobbs-Dixon,Nikku Madhusudhan,Nicolas Crouzet,Jean-Michel Desert,Ronald L. Gilliland,Korey Haynes,Heather Knutson,Michael R. Line,Zazralt Magic,Avi Mandell,Sukrit Ranjan,David Charbonneau,Mark Clampin,Sara Seager,Adam P. Showman +20 more