An optical transmission spectrum of the giant planet WASP-36 b

Abstract

We present broad-band photometry of five transits in the planetary system WASP-36, totaling 17 high-precision light curves. Four of the transits were simultaneously observed in four passbands (g, r, i, z), using the telescope-defocussing technique, and achieving scatters of less than 1 mmag per observation. We used these data to improve the measured orbital and physical properties of the system, and obtain an optical transmission spectrum of the planet. We measured a decreasing radius from bluer to redder passbands with a confidence level of more than 5 sigma. The radius variation is roughly 11 pressure scale heights between the g and the z bands. This is too strong to be Rayleigh scattering in the planetary atmosphere, and implies the presence of a species which absorbs strongly at bluer wavelengths.

arXiv comment11 pages, 9 figures, accepted for publication in MNRAS

References in corpus (55)

• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• The Dartmouth Stellar Evolution Database
• A large stellar evolution database for population synthesis studies. I. Scaled solar models and isochrones
• A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
• A Unified Theory for the Atmospheres of the Hot and Very Hot Jupiters: Two Classes of Irradiated Atmospheres
• The prevalence of dust on the exoplanet HD 189733b from Hubble and Spitzer observations
• Hubble Space Telescope Transmission Spectroscopy of the Exoplanet HD 189733b: High-altitude atmospheric haze in the optical and near-UV with STIS
• The Victoria-Regina Stellar Models: Evolutionary Tracks and Isochrones for a Wide Range in Mass and Metallicity that Allow for Empirically Constrained Amounts of Convective Core Overshooting
• Rayleigh scattering in the transit spectrum of HD 189733b
• GROND - a 7-channel imager
• A ground-based transmission spectrum of the super-Earth exoplanet GJ1214b
• Atomic and Molecular Opacities for Brown Dwarf and Giant Planet Atmospheres
• Parameter Estimation from Time-Series Data with Correlated Errors: A Wavelet-Based Method and its Application to Transit Light Curves
• Transmission Spectra of Three-Dimensional Hot Jupiter Model Atmospheres
• Atmospheric Sulfur Photochemistry on Hot Jupiters
• A Correlation Between Stellar Activity and Hot Jupiter Emission Spectra
• Model atmospheres of irradiated exoplanets: The influence of stellar parameters, metallicity, and the C/O ratio
• HST hot-Jupiter transmission spectral survey: detection of potassium in WASP-31b along with a cloud deck and Rayleigh scattering
• The Optical and Near-Infrared Transmission Spectrum of the Super-Earth GJ1214b: Further Evidence for a Metal-Rich Atmosphere
• HST hot Jupiter Transmission Spectral Survey: A detection of Na and strong optical absorption in HAT-P-1b
• HST hot Jupiter transmission spectral survey: evidence for aerosols and lack of TiO in the atmosphere of WASP-12b
• An HST Optical to Near-IR Transmission Spectrum of the Hot Jupiter WASP-19b: Detection of Atmospheric Water and Likely Absence of TiO
• Transmission Spectroscopy of the Hot-Jupiter WASP-12b from 0.7 to 5 microns
• Homogeneous studies of transiting extrasolar planets. V. New results for 38 planets
• Constraining Exoplanet Mass from Transmission Spectroscopy
• TiO and VO broad band absorption features in the optical spectrum of the atmosphere of the hot-Jupiter HD209458b
• A Gemini ground-based transmission spectrum of WASP-29b: a featureless spectrum from 515 to 720nm
• HST hot-Jupiter transmission spectral survey: Haze in the atmosphere of WASP-6b
• The solar-type eclipsing binary system LL Aquarii
• A Ground-based Optical Transmission Spectrum of WASP-6b
• The optical transmission spectrum of the hot Jupiter HAT-P-32b: clouds explain the absence of broad spectral features?
• A Search for Water in the Atmosphere of HAT-P-26b Using LDSS-3C
• HST hot-Jupiter transmission spectral survey: Clear skies for cool Saturn WASP-39b
• High-precision photometry by telescope defocussing. VI. WASP-24, WASP-25 and WASP-26
• The GTC exoplanet transit spectroscopy survey I: OSIRIS transmission spectroscopy of the short period planet WASP-43b
• Modelling the Spectra of Planets, Brown Dwarfs and Stars using VSTAR
• Physical properties, starspot activity, orbital obliquity, and transmission spectrum of the Qatar-2 planetary system from multi-colour photometry
• High-precision photometry by telescope defocussing. VII. The ultra-short period planet WASP-103
• Transmission spectroscopy of the inflated exo-Saturn HAT-P-19b
• Broad-band transmission spectrum and K-band thermal emission of WASP-43b as observed from the ground
• Physical properties and radius variations in the HAT-P-5 planetary system from simultaneous four-colour photometry
• Secondary eclipse observations for seven hot-Jupiters from the Anglo-Australian Telescope
• The GAPS Programme with HARPS-N at TNG VIII: Observations of the Rossiter-McLaughlin effect and characterisation of the transiting planetary systems HAT-P-36 and WASP-11/HAT-P-10
• The blue sky of GJ3470b: the atmosphere of a low-mass planet unveiled by ground-based photometry
• Physical properties and transmission spectrum of the WASP-80 planetary system from multi-colour photometry
• WASP-36b: A new transiting planet around a metal-poor G-dwarf, and an investigation into analyses based on a single transit light curve
• The GTC exoplanet transit spectroscopy survey II: An overly-large Rayleigh-like feature for exoplanet TrES-3b
• Examining the broadband emission spectrum of WASP-19b: A new z band eclipse detection
• Physical properties of the WASP-67 planetary system from multi-colour photometry
• Young Jupiters are Faint: New Models of the Early Evolution of Giant Planets
• Regaining the FORS: optical ground-based transmission spectroscopy of the exoplanet WASP-19b with VLT+FORS2
• Refined physical properties and g',r',i',z',J,H,K transmission spectrum of WASP-23b from the ground
• Physical properties of the HAT-P-23 and WASP-48 planetary systems from multi-colour photometry
• First simultaneous optical/near-infrared imaging of an X-ray selected, high-redshift cluster of galaxies with GROND: the galaxy population of XMMU J0338.7+0030 at z=1.1
• New transit observations for HAT-P-30 b, HAT-P-37 b, TrES-5 b, WASP-28 b, WASP-36 b, and WASP-39 b

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