Albedos, Equilibrium Temperatures, and Surface Temperatures of Habitable Planets

Abstract

The potential habitability of known exoplanets is often categorized by a nominal equilibrium temperature assuming a Bond albedo of either 0.3, similar to Earth, or 0. As an indicator of habitability, this leaves much to be desired, because albedo on other planets can be very different, and because surface temperature exceeds equilibrium temperature due to the atmospheric greenhouse effect. We use an ensemble of 3-dimensional general circulation model simulations to show that for a range of habitable planets, much of the variability of Bond albedo, equilibrium temperature, and even surface temperature can be predicted with useful accuracy from incident stellar flux and stellar temperature, two known external parameters for every confirmed exoplanet.

arXiv comment45 pages including 8 figures, 5 tables; submitted to The Astrophysical Journal

References in corpus (63)

• Gaia Data Release 2. Summary of the contents and survey properties
• Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
• A terrestrial planet candidate in a temperate orbit around Proxima Centauri
• The fast spin-rotation of a young extrasolar planet
• Stabilizing Cloud Feedback Dramatically Expands the Habitable Zone of Tidally Locked Planets
• Titan's Atmosphere and Climate
• Constraining the climate and ocean pH of the early Earth with a geological carbon cycle model
• Increased insolation threshold for runaway greenhouse processes on Earth like planets
• Was Venus the First Habitable World of our Solar System?
• An Earth-sized Planet in the Habitable Zone of a Cool Star
• The habitability of Proxima Centauri b II. Possible climates and Observability
• Strong Dependence of the Inner Edge of the Habitable Zone on Planetary Rotation Rate
• Kepler-22b: A 2.4 Earth-radius Planet in the Habitable Zone of a Sun-like Star
• The inner edge of the habitable zone for synchronously rotating planets around low-mass stars using general circulation models
• Comparison of "warm and wet" and "cold and icy" scenarios for early Mars in a 3D climate model
• The cosmic shoreline: the evidence that escape determines which planets have atmospheres, and what this may mean for Proxima Centauri b
• Assessing the Habitability of the TRAPPIST-1 System Using a 3D Climate Model
• Habitable Moist Atmospheres On Terrestrial Planets Near the Inner Edge Of the Habitable Zone Around M-dwarfs
• Modelling climate diversity, tidal dynamics and the fate of volatiles on TRAPPIST-1 planets
• The Effect of Host Star Spectral Energy Distribution and Ice-Albedo Feedback on the Climate of Extrasolar Planets
• Discovery and Validation of Kepler-452b: A 1.6-Re Super Earth Exoplanet in the Habitable Zone of a G2 Star
• A nearby M star with three transiting super-Earths discovered by K2
• The HARPS search for southern extra-solar planets XLI. A dozen planets around the M dwarfs GJ 3138, GJ 3323, GJ 273, GJ 628, and GJ 3293
• A Catalog of Kepler Habitable Zone Exoplanet Candidates
• Exploring the faint young Sun problem and the possible climates of the Archean Earth with a 3-D GCM
• Atmospheric dynamics of terrestrial exoplanets over a wide range of orbital and atmospheric parameters
• Pale Orange Dots: The Impact of Organic Haze on the Habitability and Detectability of Earthlike Exoplanets
• Exploring the climate of Proxima B with the Met Office Unified Model
• Resolving Orbital and Climate Keys of Earth and Extraterrestrial Environments with Dynamics 1.0: A General Circulation Model for Simulating the Climates of Rocky Planets
• Indication of insensitivity of planetary weathering behavior and habitable zone to surface land fraction
• Demarcating circulation regimes of synchronously rotating terrestrial planets within the habitable zone
• Habitable Climate Scenarios for Proxima Centauri b With a Dynamic Ocean
• Low paleopressure of the Martian atmosphere estimated from the size distribution of ancient craters
• Habitability of Exoplanet Waterworlds
• Mapping Earth Analogs from Photometric Variability: Spin-Orbit Tomography for Planets in Inclined Orbits
• Suppression of the water ice and snow albedo feedback on planets orbiting red dwarf stars and the subsequent widening of the habitable zone
• Constraints on Climate and Habitability for Earth-like Exoplanets Determined from a General Circulation Model
• A temperate exo-Earth around a quiet M dwarf at 3.4 parsecs
• Habitability of planets on eccentric orbits: the limits of the mean flux approximation
• Prospects for Characterizing the Atmosphere of Proxima Centauri b
• The atmospheric circulation and climate of terrestrial planets orbiting Sun-like and M-dwarf stars over a broad range of planetary parameters
• Detecting Ocean Glint on Exoplanets Using Multiphase Mapping
• A Statistical Comparative Planetology Approach to the Hunt for Habitable Exoplanets and Life Beyond the Solar System
• Climates of Warm Earth-like Planets I: 3-D Model Simulations
• Formation, tidal evolution and habitability of the Kepler-186 system
• NIR-Driven Moist Upper Atmospheres of Synchronously Rotating Temperate Terrestrial Exoplanets
• A warm or a cold early Earth? New insights from a 3-D climate-carbon model
• Ocean Dynamics and the Inner Edge of the Habitable Zone for Tidally Locked Terrestrial Planets
• Spectrum-driven Planetary Deglaciation Due to Increases in Stellar Luminosity
• The influence of a sub-stellar continent on the climate of a tidally-locked exoplanet
• Persistent or repeated surface habitability on Mars during the Late Hesperian - Amazonian
• A Low-order Model of Water Vapor, Clouds, and Thermal Emission for Tidally Locked Terrestrial Planets
• The dehydration of water worlds via atmospheric losses
• Obliquity and Eccentricity Constraints For Terrestrial Exoplanets
• The Impact of Stellar Distances on Habitable Zone Planets
• Stellar and Planetary Characterization of the Ross 128 Exoplanetary System from APOGEE Spectra
• HADES RV Programme with HARPS-N at TNG: V. A super-Earth on the inner edge of the habitable zone of the nearby M-dwarf GJ 625
• Climate Modeling of a Potential ExoVenus
• Climates of Warm Earth-like Planets II: Rotational 'Goldilocks' Zones for Fractional Habitability and Silicate Weathering
• Rotational Spectral Unmixing of Exoplanets: Degeneracies between Surface Colors and Geography
• Hydrohalite Salt-albedo Feedback Could Cool M-dwarf Planets
• K2-155: A Bright Metal-Poor M Dwarf with Three Transiting Super-Earths
• Titan brighter at twilight than in daylight

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• Exploring the recycling model of Phobos formation: rubble-pile satellites
• EXPRES IV: Two Additional Planets Orbiting $\rho$ Coronae Borealis Reveal Uncommon System Architecture
• Thermal and orbital evolution of low-mass exoplanets
• Blue marble, stagnant lid: Could dynamic topography avert a waterworld?
• Exploring Climate with Obliquity in a Variable-eccentricity Earth-like World
• Water versus land on temperate rocky planets
• A systematic study of \ce{CO2} planetary atmospheres and their link to the stellar environment
• A rocky exoplanet classification method and its application to calculating surface pressure and surface temperature
• The Most Common Habitable Planets II -- Salty Oceans in Low Mass Habitable Planets and Global Climate Evolution
• Evolution and Observable Properties of Rocky Planet Atmospheres
• A Cool Earth-sized Planet Candidate Transiting a Tenth Magnitude K-dwarf From K2