Featureless transmission spectra of 12 giant exoplanets observed by GTC/OSIRIS
arXiv:2305.19441 · doi:10.1051/0004-6361/202346091
Abstract
Exoplanet atmospheres are the key to understanding the nature of exoplanets. To this end, transit spectrophotometry provides us opportunities to investigate the physical properties and chemical compositions of exoplanet atmospheres. We aim to detect potential atmospheric signatures in 12 gaseous giant exoplanets using transit spectrophotometry and we try to constrain their atmospheric properties. The targets of interest were observed using transit spectrophotometry with the GTC OSIRIS instrument. We estimated the transit parameters and obtained the optical transmission spectra of the target planets using a Bayesian framework. We analyzed the spectral features in the transmission spectra based on atmospheric retrievals. Most of the observed transmission spectra were found to be featureless, with only the spectrum of CoRoT-1b showing strong evidence for atmospheric features. However, in combination with the previously published near-infrared transmission spectrum, we found multiple interpretations for the atmosphere of CoRoT-1b due to the lack of decisive evidence for alkali metals or optical absorbers. Featureless spectra are not necessarily indicative of cloudy atmospheres if they poorly constrain the altitudes of cloud decks. Precise constraints on the models of hazes and clouds strongly depend on the significance of the observed spectral features. Further investigations on these exoplanets, especially CoRoT-1b, are required to confirm the properties of their atmospheres.
arXiv comment29 pages, 16 figures, accepted for publication in A&A
References in corpus (99)
- MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physics
- Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
- Analytic Lightcurves for Planetary Transit Searches
- A new extensive library of PHOENIX stellar atmospheres and synthetic spectra
- X-ray spectral modelling of the AGN obscuring region in the CDFS: Bayesian model selection and catalogue
- A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
- Theoretical Transmission Spectra During Extrasolar Giant Planet Transits
- Detection of Thermal Emission from an Extrasolar Planet
- ExoMol molecular line lists XXX: a complete high-accuracy line list for water
- petitRADTRANS: a Python radiative transfer package for exoplanet characterization and retrieval
- Accurate, Empirical Radii and Masses of Planets and their Host Stars with Gaia Parallaxes
- Transmission Spectra as Diagnostics of Extrasolar Giant Planet Atmospheres
- The Transit Light Source Effect: False Spectral Features and Incorrect Densities for M-dwarf Transiting Planets
- Characterizing transiting exoplanet atmospheres with JWST
- Exoplanetary Atmospheres: Key Insights, Challenges and Prospects
- A population study of gaseous exoplanets
- Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM
- ExoMol line lists III: An improved hot rotation-vibration line list for HCN and HNC
- A Gaussian process framework for modelling instrumental systematics: application to transmission spectroscopy
- WASP-1b and WASP-2b: Two new transiting exoplanets detected with SuperWASP and SOPHIE
- ExoMol Molecular linelists -- XXXIII. The spectrum of Titanium Oxide
- Early Release Science of the Exoplanet WASP-39b with JWST NIRSpec G395H
- ExoMol molecular line lists XXXV: a rotation-vibration line list for hot ammonia
- PyTransit: Fast and Easy Exoplanet Transit Modelling in Python
- ExoMol molecular line lists - XVI: The rotation-vibration spectrum of hot HS
- Aerosol Composition of Hot Giant Exoplanets Dominated by Silicates and Hydrocarbon Hazes
- Early Release Science of the exoplanet WASP-39b with JWST NIRISS
- Mass-Metallicity Trends in Transiting Exoplanets from Atmospheric Abundances of HO, Na, and K
- ExoMol line lists XVIII. The high temperature spectrum of VO
- The Influence of Non-Uniform Cloud Cover on Transit Transmission Spectra
- ExoMol line lists -- XXXIX. Ro-vibrational molecular line list for CO
- Transiting exoplanets from the CoRoT space mission I - CoRoT-Exo-1b: a low-density short-period planet around a G0V star
- HO abundances and cloud properties in ten hot giant exoplanets
- Observing transiting planets with JWST -- Prime targets and their synthetic spectral observations
- A consistent retrieval analysis of 10 Hot Jupiters observed in transmission
- Early Release Science of the exoplanet WASP-39b with JWST NIRCam
- ExoMol line lists VII: The rotation-vibration spectrum of phosphine up to 1500 K
- Transmission Spectroscopy of the Hot-Jupiter WASP-12b from 0.7 to 5 microns
- The Complete transmission spectrum of WASP-39b with a precise water constraint
- A hybrid line list for CH and hot methane continuum
- Homogeneous studies of transiting extrasolar planets. V. New results for 38 planets
- Friends of Hot Jupiters II: No Correspondence Between Hot-Jupiter Spin-Orbit Misalignment and the Incidence of Directly Imaged Stellar Companions
- Retrieval analysis of 38 WFC3 transmission spectra and resolution of the normalisation degeneracy
- Constraining Exoplanet Mass from Transmission Spectroscopy
- Binarity of Transit Host Stars - Implications on Planetary Parameters
- The Transit Light Source Effect II: The Impact of Stellar Heterogeneity on Transmission Spectra of Planets Orbiting Broadly Sun-like Stars
- ExoMol line lists II: The ro-vibrational spectrum of SiO
- New study of the line profiles of sodium perturbed by H2
- Quantifying and Predicting the Presence of Clouds in Exoplanet Atmospheres
- ExoMol molecular line lists V: The ro-vibrational spectra of NaCl and KCl
- Trends in Atmospheric Properties of Neptune-Size Exoplanets
- WASP-42 b and WASP-49 b: two new transiting sub-Jupiters
- ExoMol molecular line lists -- XXXVII: spectra of acetylene
- WASP-39b: a highly inflated Saturn-mass planet orbiting a late G-type star
- Transit timing variations in WASP-10b induced by stellar activity?
- Stellar companions to exoplanet host stars: Lucky Imaging of transiting planet hosts
- The Transiting Exoplanet Community Early Release Science Program for JWST
- TrES-4: A Transiting Hot Jupiter of Very Low Density
- VLT FORS2 comparative transmission spectroscopy: Detection of Na in the atmosphere of WASP-39b from the ground
- A Smaller Radius for the Transiting Exoplanet WASP-10b
- The optical transmission spectrum of the hot Jupiter HAT-P-32b: clouds explain the absence of broad spectral features?
- Transiting Exoplanet Studies and Community Targets for JWST's Early Release Science Program
- HAT-P-18b and HAT-P-19b: Two Low-Density Saturn-Mass Planets Transiting Metal-Rich K Stars
- CRIRES spectroscopy and empirical line-by-line identification of FeH molecular absorption in an M dwarf
- Five key exoplanet questions answered via the analysis of 25 hot Jupiter atmospheres in eclipse
- Statistical Analysis of Hubble/WFC3 Transit Spectroscopy of Extrasolar Planets
- WASP-10b: a 3M_J, gas-giant planet transiting a late-type K star
- Transit Timing Variation Measurements of WASP-12b and Qatar-1b: No Evidence for Additional Planets
- The GAPS Programme with HARPS-N at TNG XVI: Measurement of the Rossiter-McLaughlin effect of the transiting planetary systems HAT-P-3, HAT-P-12, HAT-P-22, WASP-39 and WASP-60
- A Lucky Imaging search for stellar sources near 74 transit hosts
- Rayleigh scattering in the transmission spectrum of HAT-P-18b
- HST hot-Jupiter transmission spectral survey: Clear skies for cool Saturn WASP-39b
- Toward the analysis of JWST exoplanet spectra: Identifying troublesome model parameters
- A Characteristic Transmission Spectrum dominated by HO applies to the majority of HST/WFC3 exoplanet observations
- HAT-P-57b: A Short-Period Giant Planet Transiting A Bright Rapidly Rotating A8V Star Confirmed Via Doppler Tomography
- Adaptive Optics Images II: 12 Kepler Objects of Interest and 15 Confirmed Transiting Planets
- Atmospheric Characterization of 5 Hot Jupiters with Wide Field Camera 3 on the Hubble Space Telescope
- Qatar-1b: a hot Jupiter orbiting a metal-rich K dwarf star
- FORS2 observes a multi-epoch transmission spectrum of the hot Saturn-mass exoplanet WASP-49b
- LRG-BEASTS: transmission spectroscopy and retrieval analysis of the highly-inflated Saturn-mass planet WASP-39b
- The discovery of WASP-151b, WASP-153b, WASP-156b: Insights on giant planet migration and the upper boundary of the Neptunian desert
- High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). I. Lucky imaging observations of 101 systems in the southern hemisphere
- Transit timing variation and activity in the WASP-10 planetary system
- A Lucky Imaging search for stellar companions to transiting planet host stars
- Evidence for disequilibrium chemistry from vertical mixing in hot Jupiter atmospheres. A comprehensive survey of transiting close-in gas giant exoplanets with warm-Spitzer/IRAC
- WASP-36b: A new transiting planet around a metal-poor G-dwarf, and an investigation into analyses based on a single transit light curve
- Metastable Helium Reveals an Extended Atmosphere for the Gas Giant HAT-P-18b
- A multiplicity study of transiting exoplanet host stars. I. High-contrast imaging with VLT/SPHERE
- An optical transmission spectrum of the giant planet WASP-36 b
- Lucky Imaging of transiting planet host stars with LuckyCam
- WASP-32b: A transiting hot Jupiter planet orbiting a lithium-poor, solar-type star
- Impact of planetary mass uncertainties on exoplanet atmospheric retrievals
- A SuperWASP search for additional transiting planets in 24 known systems
- A Window on Exoplanet Dynamical Histories: Rossiter-McLaughlin Observations of WASP-13b and WASP-32b
- Testing connections between exo-atmospheres and their host stars. GEMINI-N/GMOS ground-based transmission spectrum of Qatar-1b
- Analysis of new high-precision transit light curves of WASP-10 b: starspot occultations, small planetary radius, and high metallicity
- Atmospheric Characterization of Hot Jupiter CoRoT-1 b Using the Wide Field Camera 3 on the Hubble Space Telescope
- Detection of Na and K in the atmosphere of the hot Jupiter HAT-P-1b with P200/DBSP
- Benchmark tests of transmission spectroscopy using transiting white dwarfs