Detection of Na in the atmosphere of the hot Jupiter HAT-P-55b
arXiv:2404.13849 · doi:10.1051/0004-6361/202449915
Abstract
The spectral signatures of optical absorbers, when combined with those of infrared molecules, play a critical role in constraining the cloud properties of exoplanet atmospheres. We aim to use optical transmission spectroscopy to confirm the tentative color signature previously observed by multiband photometry in the atmosphere of hot Jupiter HAT-P-55b. We observed a transit of HAT-P-55b with the OSIRIS spectrograph on the Gran Telescopio Canarias (GTC). We created two sets of spectroscopic light curves using the conventional band-integrated method and the newly proposed pixel-based method to derive the transmission spectrum. We performed Bayesian spectral retrieval analyses on the transmission spectrum to interpret the observed atmospheric properties. The transmission spectra derived from the two methods are consistent, both spectrally resolving the tentative color signature observed by MuSCAT2. The retrievals on the combined OSIRIS and MuSCAT2 transmission spectrum yield the detection of Na at 5.5 and the tentative detection of MgH at 3.4. The current optical-only wavelength coverage cannot constrain the absolute abundances of the atmospheric species. Space-based observations covering the molecular infrared bands or ground-based high-resolution spectroscopy are needed to further constrain the atmospheric properties of HAT-P-55b.
arXiv comment10 pages, 6 figures, accepted for publication in A&A
References in corpus (62)
- emcee: The MCMC Hammer
- X-ray spectral modelling of the AGN obscuring region in the CDFS: Bayesian model selection and catalogue
- Bayes in the sky: Bayesian inference and model selection in cosmology
- batman: BAsic Transit Model cAlculatioN in Python
- The effects of snowlines on C/O in planetary atmospheres
- Fast and scalable Gaussian process modeling with applications to astronomical time series
- A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
- Achieving better than 1 minute accuracy in the Heliocentric and Barycentric Julian Dates
- Theoretical Transmission Spectra During Extrasolar Giant Planet Transits
- A Temperature and Abundance Retrieval Method for Exoplanet Atmospheres
- petitRADTRANS: a Python radiative transfer package for exoplanet characterization and retrieval
- Homogeneous studies of transiting extrasolar planets. IV. Thirty systems with space-based light curves
- Atmospheric Retrieval for Super-Earths: Uniquely Constraining the Atmospheric Composition with Transmission Spectroscopy
- Rayleigh scattering in the transit spectrum of HD 189733b
- The imprint of exoplanet formation history on observable present-day spectra of hot Jupiters
- Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM
- How to Distinguish between Cloudy Mini-Neptunes and Water/Volatile-Dominated Super-Earths
- Transmission Spectra of Three-Dimensional Hot Jupiter Model Atmospheres
- A Gaussian process framework for modelling instrumental systematics: application to transmission spectroscopy
- HD 209458b in New Light: Evidence of Nitrogen Chemistry, Patchy Clouds and Sub-Solar Water
- Towards Chemical Constraints on Hot Jupiter Migration
- Limb darkening and exoplanets: testing stellar model atmospheres and identifying biases in transit parameters
- Atmospheric Chemistry in Giant Planets, Brown Dwarfs, and Low-Mass Dwarf Stars III. Iron, Magnesium, and Silicon
- Extremely Irradiated Hot Jupiters: Non-Oxide Inversions, H- Opacity, and Thermal Dissociation of Molecules
- 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
- Detection of H2O and evidence for TiO/VO in an ultra hot exoplanet atmosphere
- An optical transmission spectrum for the ultra-hot Jupiter WASP-121b measured with the Hubble Space Telescope
- An absolute sodium abundance for a cloud-free 'hot Saturn' exoplanet
- Constraining Exoplanet Mass from Transmission Spectroscopy
- Clouds, Gravity and Metallicity in Blue L dwarfs: The Case of 2MASS J11263991-5003550
- Gran Telescopio Canarias OSIRIS Transiting Exoplanet Atmospheric Survey: Detection of potassium in XO-2b from narrowband spectrophotometry
- The theory of transmission spectra revisited: a semi-analytical method for interpreting WFC3 data and an unresolved challenge
- The First U.S. Naval Observatory Robotic Astrometric Telescope Catalog (URAT1)
- A New Window into Planet Formation and Migration: Refractory-to-Volatile Elemental Ratios in Ultra-hot Jupiters
- The GTC exoplanet transit spectroscopy survey IX. Detection of Haze, Na, K, and Li in the super-Neptune WASP-127b
- On degeneracies in retrievals of exoplanetary transmission spectra
- ARES II: Characterising the Hot Jupiters WASP-127 b, WASP-79 b and WASP-62 b with HST
- The GTC exoplanet transit spectroscopy survey. VII. Detection of sodium in WASP-52b's cloudy atmosphere
- The Metal-Rich Atmosphere of the Neptune HAT-P-26b
- WASP-127b transmission spectrum]{Abundance measurements of HO and carbon-bearing species in the atmosphere of WASP-127b confirm its super-solar metallicity
- The Hubble PanCET program: Transit and Eclipse Spectroscopy of the Strongly Irradiated Giant Exoplanet WASP-76b
- An analytical formalism accounting for clouds and other "surfaces" for exoplanet transmission spectroscopy
- Detection of Na, K and HO in the hazy atmosphere of WASP-6b
- Gemini/GMOS Optical Transmission Spectroscopy of WASP-121b: signs of variability in an ultra-hot Jupiter?
- The GTC exoplanet transit spectroscopy survey. VI. A spectrally-resolved Rayleigh scattering slope in GJ 3470b
- The HST PanCET Program: Hints of Na I & Evidence of a Cloudy Atmosphere for the Inflated Hot Jupiter WASP-52b
- A Search for FeH in Hot-Jupiter Atmospheres with High-Dispersion Spectroscopy
- Transmission Spectroscopy of WASP-79b from 0.6 to 5.0 m
- A Comprehensive Analysis of WASP-17b's Transmission Spectrum from Space-Based Observations
- The GTC exoplanet transit spectroscopy survey XI. Possible detection of Rayleigh scattering in the atmosphere of the Saturn-mass planet WASP-69b
- LRG-BEASTS: sodium absorption and Rayleigh scattering in the atmosphere of WASP-94A b using NTT/EFOSC2
- Detection of Na in WASP-21b's lower and upper atmosphere
- Evidence of a Clear Atmosphere for WASP-62b: the Only Known Transiting Gas Giant in the JWST Continuous Viewing Zone
- Evidence for chromium hydride in the atmosphere of Hot Jupiter WASP-31b
- LRG-BEASTS: Ground-based Detection of Sodium and a Steep Optical Slope in the Atmosphere of the Highly Inflated Hot-Saturn WASP-21b
- Featureless transmission spectra of 12 giant exoplanets observed by GTC/OSIRIS
- Ground-based Spectroscopy of the Exoplanet XO-2b using a Systematic Wavelength Calibration
- HAT-P-55b: A Hot Jupiter Transiting a Sun-like Star
- 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
- Simultaneous multicolour transit photometry of hot Jupiters HAT-P-19b, HAT-P-51b, HAT-P-55b, and HAT-P-65b