Transmission spectroscopy of the hot Jupiter TrES-3 b: Disproof of an overly large Rayleigh-like feature

Abstract

Context. Transit events of extrasolar planets offer the opportunity to study the composition of their atmospheres. Previous work on transmission spectroscopy of the close-in gas giant TrES-3 b revealed an increase in absorption towards blue wavelengths of very large amplitude in terms of atmospheric pressure scale heights, too large to be explained by Rayleigh-scattering in the planetary atmosphere. Aims. We present a follow-up study of the optical transmission spectrum of the hot Jupiter TrES-3 b to investigate the strong increase in opacity towards short wavelengths found by a previous study. Furthermore, we aim to estimate the effect of stellar spots on the transmission spectrum. Methods. This work uses previously published long slit spectroscopy transit data of the Gran Telescopio Canarias (GTC) and published broad band observations as well as new observations in different bands from the near-UV to the near-IR, for a homogeneous transit light curve analysis. Additionally, a long-term photometric monitoring of the TrES-3 host star was performed. Results. Our newly analysed GTC spectroscopic transit observations show a slope of much lower amplitude than previous studies. We conclude from our results the previously reported increasing signal towards short wavelengths is not intrinsic to the TrES-3 system. Furthermore, the broad band spectrum favours a flat spectrum. Long-term photometric monitoring rules out a significant modification of the transmission spectrum by unocculted star spots.

arXiv comment12 pages, 9 Figures, accepted for publication in Astronomy & Astrophysics

References in corpus (60)

• A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
• Clouds in the atmosphere of the super-Earth exoplanet GJ 1214b
• Achieving better than 1 minute accuracy in the Heliocentric and Barycentric Julian Dates
• The effect of red noise on planetary transit detection
• Homogeneous studies of transiting extrasolar planets. IV. Thirty systems with space-based light curves
• A giant comet-like cloud of hydrogen escaping the warm Neptune-mass exoplanet GJ 436b
• 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
• Eclipsing binaries in open clusters. II. V453 Cyg in NGC 6871
• Homogeneous studies of transiting extrasolar planets. I. Light curve analyses
• The Transit Light Curve Project. IX. Evidence for a Smaller Radius of the Exoplanet XO-3b
• Transmission Spectra of Three-Dimensional Hot Jupiter Model Atmospheres
• Water Vapour Absorption in the Clear Atmosphere of an exo-Neptune
• A Correlation Between Stellar Activity and Hot Jupiter Emission Spectra
• Stellar Limb-Darkening Coefficients for CoRot and Kepler
• Ground-based detection of sodium in the transmission spectrum of exoplanet HD209458b
• Limb darkening and exoplanets: testing stellar model atmospheres and identifying biases in transit parameters
• Detection of H2O and evidence for TiO/VO in an ultra hot exoplanet atmosphere
• Transmission spectral properties of clouds for hot Jupiter exoplanets
• A Time-Dependent Radiative Model of HD209458b
• Friends of Hot Jupiters II: No Correspondence Between Hot-Jupiter Spin-Orbit Misalignment and the Incidence of Directly Imaged Stellar Companions
• Effect of stellar spots on high-precision transit light-curve
• The Nature of the Atmosphere of the Transiting Super-Earth GJ 1214b
• Impact of occultations of stellar active regions on transmission spectra: Can occultation of a plage mimic the signature of a blue sky?
• TrES-3: A Nearby, Massive, Transiting Hot Jupiter in a 31-Hour Orbit
• VLT FORS2 comparative transmission spectroscopy: Detection of Na in the atmosphere of WASP-39b from the ground
• GTC OSIRIS transiting exoplanet atmospheric survey: detection of sodium in XO-2b from differential long-slit spectroscopy
• Ground-based near-UV observations of 15 transiting exoplanets: Constraints on their atmospheres and no evidence for asymmetrical transits
• Spectra as Windows into Exoplanet Atmospheres
• A New Spectroscopic and Photometric Analysis of the Transiting Planet Systems TrES-3 and TrES-4
• Extrasolar Planet Transits Observed at Kitt Peak National Observatory
• Glancing views of the Earth. From a lunar eclipse to an exoplanetary transit
• A transit timing analysis of nine RISE light curves of the exoplanet system TrES-3
• Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry
• Transmission spectroscopy of the sodium 'D' doublet in WASP-17b with the VLT
• VLT/FORS2 comparative transmission spectroscopy II: confirmation of a cloud-deck and Rayleigh scattering in WASP-31b, but no potassium?
• System parameters, transit times and secondary eclipse constraints of the exoplanet systems HAT-P-4, TrES-2, TrES-3 and WASP-3 from the NASA EPOXI Mission of Opportunity
• Transiting Exoplanets with JWST
• The GTC exoplanet transit spectroscopy survey I: OSIRIS transmission spectroscopy of the short period planet WASP-43b
• FORS2 observes a multi-epoch transmission spectrum of the hot Saturn-mass exoplanet WASP-49b
• 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
• Transmission spectroscopy of the inflated exoplanet WASP-52b, and evidence for a bright region on the stellar surface
• Broad-band spectrophotometry of the hot Jupiter HAT-P-12b from the near-UV to the near-IR
• Potassium detection in the clear atmosphere of a hot-Jupiter: FORS2 transmission spectroscopy of WASP-17b
• Detection of the atmosphere of the 1.6 Earth mass exoplanet GJ 1132b
• Transit Timing Analysis in the HAT-P-32 system
• Transmission spectroscopy of HAT-P-32b with the LBT: confirmation of clouds/hazes in the planetary atmosphere
• Possible Transit Timing Variations of the TrES-3 Planetary System
• Characterizing Transiting Extrasolar Planets with Narrow-Band Photometry and GTC/OSIRIS
• Near-UV and optical observations of the transiting exoplanet TrES-3b
• The GTC exoplanet transit spectroscopy survey II: An overly-large Rayleigh-like feature for exoplanet TrES-3b
• Follow-up photometry of TrES-3
• Contamination from a nearby star cannot explain the anomalous transmission spectrum of the ultra-short period giant planet WASP-103b
• Optical Observations of the Transiting Exoplanet GJ 1214b
• Large Binocular Telescope view of the atmosphere of GJ1214b
• Physical Properties of the Transiting Planetary System TrES-3
• APOSTLE: Eleven Transit Observations of TrES-3b
• The GTC exoplanet transit spectroscopy survey. IV.: No asymmetries in the transit of Corot-29b

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• TraMoS V. Updated ephemeris and multi-epoch monitoring of the hot Jupiters WASP-18Ab, WASP-19b, and WASP-77Ab
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• Planet-star interactions with precise transit timing. IV. Probing the regime of dynamical tides for GK host stars
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