Exploring the Diversity of Jupiter-Class Planets (Discussion Meeting Contribution)
arXiv:1403.4436 · doi:10.1098/rsta.2013.0064
Abstract
Royal Society Discussion Meeting (2013) `Characterizing exoplanets'. Of the 900+ confirmed exoplanets discovered since 1995 for which we have constraints on their mass (i.e., not including Kepler candidates), 75% have masses larger than Saturn (0.3MJ), 53% are more massive than Jupiter, and 67% are within 1 AU of their host stars. And yet the term `hot Jupiter' fails to account for the incredible diversity of this class of object, which exists on a continuum of giant planets from the cool jovians of our own solar system to the highly-irradiated, tidally-locked hot roasters. We review theoretical expectations for the temperatures, molecular composition and cloud properties of Jupiter-class objects under a variety of different conditions. We discuss the classification schemes for these Jupiter-class planets proposed to date, including the implications for our own Solar System giant planets and the pitfalls associated with classification at this early stage of exoplanetary spectroscopy. We discuss the range of planetary types described by previous authors, accounting for: (i) thermochemical equilibrium expectations for cloud condensation and favoured chemical stability fields; (ii) the metallicity and formation mechanism for these giant planets; (iii) the importance of optical absorbers for energy partitioning and the generation of a temperature inversion; (iv) the favoured photochemical pathways and expectations for minor species (e.g., saturated hydrocarbons and nitriles); (v) the unexpected presence of molecules due to vertical mixing of species above their quench levels; and (vi) methods for energy and material redistribution throughout the atmosphere (e.g., away from the highly irradiated daysides of close-in giants). Finally, we will discuss the benefits and flaws of retrieval techniques for establishing a family of atmospheric solutions that reproduce the available data.
arXiv commentRoyal Society Theo Murphy Discussion Meeting (2013) `Characterizing exoplanets: detection, formation, interiors, atmospheres and habitability'.Fletcher LN, Irwin PGJ, Barstow JK, de Kok RJ, Lee J-M, Aigrain S. 2014, Exploring the diversity of Jupiter-class planets. Phil. Trans. R. Soc. A 20130064
References in corpus (57)
- Detection of an Extrasolar Planet Atmosphere
- The false positive rate of Kepler and the occurrence of planets
- The Limiting Effects of Dust in Brown Dwarf Model Atmospheres
- Planetary Candidates Observed by Kepler, III: Analysis of the First 16 Months of Data
- The effects of snowlines on C/O in planetary atmospheres
- The orbital motion, absolute mass, and high-altitude winds of exoplanet HD209458b
- Precipitating Condensation Clouds in Substellar Atmospheres
- 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
- A high accuracy computed water line list
- A Temperature and Abundance Retrieval Method for Exoplanet Atmospheres
- Detection of atmospheric haze on an extrasolar planet: The 0.55 - 1.05 micron transmission spectrum of HD189733b with the Hubble Space Telescope
- Chemical Equilibrium Abundances in Brown Dwarf and Extrasolar Giant Planet Atmospheres
- 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
- A Possible Bifurcation in Atmospheres of Strongly Irradiated Stars and Planets
- Neglected Clouds in T and Y Dwarf Atmospheres
- The prevalence of dust on the exoplanet HD 189733b from Hubble and Spitzer observations
- Exoplanet Atmospheres
- Atmospheric Retrieval for Super-Earths: Uniquely Constraining the Atmospheric Composition with Transmission Spectroscopy
- The signature of orbital motion from the dayside of the planet tau Bootis b
- The Discovery of Y Dwarfs Using Data from the Wide-field Infrared Survey Explorer (WISE)
- A Systematic Retrieval Analysis of Secondary Eclipse Spectra I: A Comparison of Atmospheric Retrieval Techniques
- High C/O Ratio and Weak Thermal Inversion in the Very Hot Atmosphere of Exoplanet WASP-12b
- Can TiO Explain Thermal Inversions in the Upper Atmospheres of Irradiated Giant Planets?
- The Compositional Diversity of Extrasolar Terrestrial Planets: I. In-Situ Simulations
- 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
- Theoretical Spectra and Atmospheres of Extrasolar Giant Planets
- A Correlation Between Stellar Activity and Hot Jupiter Emission Spectra
- Atmospheric Chemistry in Giant Planets, Brown Dwarfs, and Low-Mass Dwarf Stars II. Sulfur and Phosphorus
- Theoretical Spectral Models of the Planet HD 209458b with a Thermal Inversion and Water Emission Bands
- The Near-Infrared and Optical Spectra of Methane Dwarfs and Brown Dwarfs
- Detection of carbon monoxide in the high-resolution day-side spectrum of the exoplanet HD 189733b
- A comparison of chemistry and dust cloud formation in ultracool dwarf model atmospheres
- Optimal Estimation Retrievals of the Atmospheric Structure and Composition of HD 189733b from Secondary Eclipse Spectroscopy
- The Influence of Atmospheric Dynamics on the Infrared Spectra and Light Curves of Hot Jupiters
- A new look at NICMOS transmission spectroscopy of HD189733, GJ-436 and XO-1: no conclusive evidence for molecular features
- Theory for the Secondary Eclipse Fluxes, Spectra, Atmospheres, and Light Curves of Transiting Extrasolar Giant Planets
- On the Dayside Thermal Emission of Hot Jupiters
- Information Content of Exoplanetary Transit Spectra: An Initial Look
- Chemical Kinetics on Extrasolar Planets
- High Temperature Photochemistry in the Atmosphere of HD189733b
- EChO - Exoplanet Characterisation Observatory
- Physical parameters of two very cool T dwarfs
- Atmospheric Retrieval Analysis of the Directly Imaged Exoplanet HR 8799b
- Ground-based NIR emission spectroscopy of HD189733b
- Atmospheric Circulation of Exoplanets
- On the Insignificance of Photochemical Hydrocarbon Aerosols in the Atmospheres of Close-in Extrasolar Giant Planets
- Clouds and Hazes in Exoplanet Atmospheres
- Exoplanet Chemistry
- The source of widespread 3-m absorption in Jupiter's clouds: Constraints from 2000 Cassini VIMS observations
- On the formation location of Uranus and Neptune as constrained by dynamical and chemical models of comets
- The influence of forward-scattered light in transmission measurements of (exo)planetary atmospheres
- Resolved Spectroscopy of a Brown Dwarf Binary at the T Dwarf/Y Dwarf Transition
- Thermometric Soots on Warm Jupiters?
- Gas phase mean opacities for varying [M/H], N/O, and C/O