Thermal Emission of Exoplanet XO-1b
arXiv:0805.2418 · doi:10.1086/590140
Abstract
We estimate flux ratios of the extrasolar planet XO-1b to its host star XO-1 at 3.6, 4.5, 5.8 and 8.0 microns with the IRAC on the Spitzer Space Telescope to be 0.00086 +/- 0.00007, 0.00122 +/- 0.00009, 0.00261 +/- 0.00031 and 0.00210 +/- 0.00029, respectively. The fluxes are inconsistent with a canonical cloudless model for the thermal emission from a planet and suggest an atmosphere with a thermal inversion layer and a possible stratospheric absorber. A newly emerging correlation between the presence of a thermal inversion layer in the planetary atmosphere and stellar insolation of the planet (Burrows et al. 2007b) is refined. The sub-stellar point flux from the parent star at XO-1b of ~ 0.49 x 10^9 erg cm^-2 s^-1 sets a new lower limit for the occurrence of a thermal inversion in a planetary atmosphere.
arXiv comment7 pages, 4 figures, 2 tables, accepted for publication to ApJ
References in corpus (26)
- The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
- The Spitzer Space Telescope Mission
- Analytic Lightcurves for Planetary Transit Searches
- Detection of an Extrasolar Planet Atmosphere
- A Unified Theory for the Atmospheres of the Hot and Very Hot Jupiters: Two Classes of Irradiated Atmospheres
- A map of the day-night contrast of the extrasolar planet HD 189733b
- Spitzer Survey of the Large Magellanic Cloud, Surveying the Agents of a Galaxy's Evolution (SAGE) I: Overview and Initial Results
- Detection of Thermal Emission from an Extrasolar Planet
- Infrared radiation from an extrasolar planet
- Improved parameters for extrasolar transiting planets
- A Possible Bifurcation in Atmospheres of Strongly Irradiated Stars and Planets
- The 3.6-8.0 Micron Broadband Emission Spectrum of HD 209458b: Evidence for an Atmospheric Temperature Inversion
- Theoretical Spectra and Light Curves of Close-in Extrasolar Giant Planets and Comparison with Data
- Theoretical Spectral Models of the Planet HD 209458b with a Thermal Inversion and Water Emission Bands
- Strong Infrared Emission from the Extrasolar Planet HD189733b
- The Transit Light Curve (TLC) Project. I. Four Consecutive Transits of the Exoplanet XO-1b
- A Spectrum of an Extrasolar Planet
- Spitzer Transit and Secondary Eclipse Photometry of GJ 436b
- A Spitzer Spectrum of the Exoplanet HD 189733b
- The Influence of Atmospheric Dynamics on the Infrared Spectra and Light Curves of Hot Jupiters
- Identification of Absorption Features in an Extrasolar Planet Atmosphere
- Theory for the Secondary Eclipse Fluxes, Spectra, Atmospheres, and Light Curves of Transiting Extrasolar Giant Planets
- A Transiting Planet of a Sun-like Star
- Resolving the Surfaces of Extrasolar Planets With Secondary Eclipse Light Curves
- A Sensitive Search for Variability in Late L Dwarfs: The Quest for Weather
- Analysis of Spitzer Spectra of Irradiated Planets: Evidence for Water Vapor?
Cited by in corpus (70)
- Atmospheric circulation of hot Jupiters: Coupled radiative-dynamical general circulation model simulations of HD 189733b and HD 209458b
- Infrared Transmission Spectroscopy of the Exoplanets HD209458b and XO-1b Using the Wide Field Camera-3 on the Hubble Space Telescope
- Disequilibrium Carbon, Oxygen, and Nitrogen Chemistry in the Atmospheres of HD 189733b and HD 209458b
- C/O ratio as a Dimension for Characterizing Exoplanetary Atmospheres
- Exoplanet Atmospheres
- The Statistics of Albedo and Heat Recirculation on Hot Exoplanets
- Can TiO Explain Thermal Inversions in the Upper Atmospheres of Irradiated Giant Planets?
- Transmission Spectra of Three-Dimensional Hot Jupiter Model Atmospheres
- Atmospheric Sulfur Photochemistry on Hot Jupiters
- Chemical consequences of the C/O ratio on hot Jupiters: Examples from WASP-12b,CoRoT-2b, XO-1b, and HD 189733b
- Spitzer Secondary Eclipses of the Dense, Modestly-irradiated, Giant Exoplanet HAT-P-20b Using Pixel-Level Decorrelation
- A Correlation Between Stellar Activity and Hot Jupiter Emission Spectra
- Three Dimensional Modeling of Hot Jupiter Atmospheric Flows
- Pseudo 2D chemical model of hot Jupiter atmospheres: application to HD 209458b and HD 189733b
- Improved parameters for the transiting hot Jupiters WASP-4b and WASP-5b
- New Analysis Indicates No Thermal Inversion in the Atmosphere of HD 209458b
- The 8 Micron Phase Variation of the Hot Saturn HD 149026b
- Probing the terminator region atmosphere of the Hot-Jupiter XO-1b with transmission spectroscopy
- The thermal emission of the young and massive planet CoRoT-2b at 4.5 and 8 microns
- Detection of a Temperature Inversion in the Broadband Infrared Emission Spectrum of TrES-4
- Studying the atmosphere of the exoplanet HAT-P-7b via secondary eclipse measurements with EPOXI, Spitzer and Kepler
- Spectra as Windows into Exoplanet Atmospheres
- Near-infrared Thermal Emission from WASP-12b: detections of the secondary eclipse in Ks, H & J
- Spitzer Secondary Eclipses of WASP-18b
- Features in the Broadband Eclipse Spectra of Exoplanets: Signal or Noise?
- C/O Ratios of Stars with Transiting Hot Jupiter Exoplanets
- Warm Spitzer Photometry of the Transiting Exoplanets CoRoT-1 and CoRoT-2 at Secondary Eclipse
- WASP-8b: Characterization of a Cool and Eccentric Exoplanet with Spitzer
- Searching for Thermal Inversion Agents in the Transmission Spectrum of MASCARA-2b/KELT-20b: Detection of Neutral Iron and Ionised Calcium HK Lines
- Atmospheric Circulation of Exoplanets
- Evidence against a strong thermal inversion in HD 209458 b from high-dispersion spectroscopy
- Detection of Thermal Emission of XO-2b: Evidence for a Weak Temperature Inversion
- Warm Spitzer Photometry of XO-4b, HAT-P-6b and HAT-P-8b
- Multiwavelength flux variations induced by stellar magnetic activity: effects on planetary transits
- Secondary Eclipse Photometry of WASP-4b with Warm Spitzer
- Ks-band detection of thermal emission and color constraints to CoRoT-1b: A low-albedo planet with inefficient atmospheric energy redistribution and a temperature inversion
- Spitzer IRAC Secondary Eclipse Photometry of the Transiting Extrasolar Planet HAT-P-1b
- The Broadband Infrared Emission Spectrum of the Exoplanet TrES-3
- Thermal Emission of WASP-14b Revealed with Three Spitzer Eclipses
- A transition between the hot and the ultra-hot Jupiter atmospheres
- Warm Spitzer Photometry of Three Hot Jupiters: HAT-P-3b, HAT-P-4b and HAT-P-12b
- Detection of Planetary Emission from the Exoplanet TrES-2 using Spitzer /IRAC
- Thermal emission at 3.6-8 micron from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star
- Secondary eclipse observations for seven hot-Jupiters from the Anglo-Australian Telescope
- The atmospheres of the hot-Jupiters Kepler-5b and Kepler-6b observed during occultations with Warm-Spitzer and Kepler
- Thermal Emission and Tidal Heating of the Heavy and Eccentric Planet XO-3b
- 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
- The Dawes Review 3: The Atmospheres of Extrasolar Planets and Brown Dwarfs
- WASP-36b: A new transiting planet around a metal-poor G-dwarf, and an investigation into analyses based on a single transit light curve
- Ground-based detections of thermal emission from the dense hot Jupiter WASP-43b in H and Ks-bands
- NICMOS Observations of the Transiting Hot Jupiter XO-1b
- Warm Spitzer and Palomar Near-IR Secondary Eclipse Photometry of Two Hot Jupiters: WASP-48b and HAT-P-23b
- Models of Neptune-Mass Exoplanets: Emergent Fluxes and Albedos
- Examining the broadband emission spectrum of WASP-19b: A new z band eclipse detection
- Colour-magnitude diagrams of transiting Exoplanets - II. A larger sample from photometric distances
- The GROUSE project II: Detection of the Ks-band secondary eclipse of exoplanet HAT-P-1b
- High-precision multi-wavelength eclipse photometry of the ultra-hot gas giant exoplanet WASP-103 b
- Secondary Eclipse Photometry of the Exoplanet WASP-5b with Warm Spitzer
- Search for TiO and Optical Night-side Emission from the Exoplanet WASP-33b
- Benchmark Tests for Markov Chain Monte Carlo Fitting of Exoplanet Eclipse Observations
- Thermal emission from WASP-24b at 3.6 and 4.5 μm
- Characterization of Exoplanets: Secondary Eclipses
- Trends in Spitzer Secondary Eclipses
- A SEA BASS on the exoplanet HD209458b
- Warm Spitzer Occultation Photometry of WASP-26b at 3.6μm and 4.5μm
- Physical properties and optical-infrared transmission spectrum of the giant planet XO-1b
- APOSTLE: Longterm Transit Monitoring and Stability Analysis of XO-2b
- Thermal emission of WASP-48b in the Ks-band
- Atmospheric heat redistribution effect on Emission spectra of Hot-Jupiters
- Effect of clouds on emission spectra for Super Venus