Exploring Super-Earth Surfaces: Albedo of Near-Airless Magma Ocean Planets and Topography
arXiv:2010.06433 · doi:10.1016/j.icarus.2020.114175
Abstract
In this paper we propose an analytic function for the spherical albedo values of airless and near-airless magma ocean planets (AMOPs). We generated 2-D fractal surfaces with varying compositions onto which we individually threw 10,000 light rays. Using an approximate form of the Fresnel equations we measured how much of the incident light was reflected. Having repeated this algorithm on varying surface roughnesses we find the spherical albedo as a function of the Hurst exponent, the geochemical composition of the magma, and the wavelength. As a proof of concept, we used our model on Kepler-10b to demonstrate the applicability of our approach. We present the spherical albedo values produced from different lava compositions and multiple tests that can be applied to observational data in order to determine their characteristics. Currently, there is a strong degeneracy in the surface composition of AMOPs due to the large uncertainties in their measured spherical albedos. In spite of this, when applied to Kepler-10b we show that its high albedo could be caused by a moderately wavy ocean that is rich in oxidised metallic species such as FeO, , . This would imply that Kepler-10b is a coreless or near-coreless body.
References in corpus (57)
- Astropy: A Community Python Package for Astronomy
- The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
- The California-Kepler Survey. III. A Gap in the Radius Distribution of Small Planets
- Universal dynamical conductance in graphite
- Kepler planets: a tale of evaporation
- The evaporation valley in the Kepler planets
- Growth Model Interpretation of Planet Size Distribution
- Extreme Water Loss and Abiotic O Buildup On Planets Throughout the Habitable Zones of M Dwarfs
- KEPLER's First Rocky Planet: Kepler-10b
- Materials Pushing the Application Limits of Wire Grid Polarizers further into the Deep Ultraviolet Spectral Range
- Mass-Radius Relation for Rocky Planets based on PREM
- Planetary population synthesis coupled with atmospheric escape: a statistical view of evaporation
- Reflected Spectra and Albedos of Extrasolar Giant Planets I: Clear and Cloudy Atmospheres
- Compositional imprints in density-distance-time: a rocky composition for close-in low-mass exoplanets from the location of the valley of evaporation
- Equilibrium chemistry down to 100 K - Impact of silicates and phyllosilicates on carbon/oxygen ratio
- A diagram for the evaporation status of extrasolar planets
- A Detailed Model Grid for Solid Planets from 0.1 through 100 Earth Masses
- Detection of an atmosphere around the super-Earth 55 Cancri e
- A generalized bayesian inference method for constraining the interiors of super Earths and sub-Neptunes
- Chemistry of Silicate Atmospheres of Evaporating Super-Earths
- Bulk Composition of GJ 1214b and other sub-Neptune exoplanets
- Changing Phases of Alien Worlds: Probing Atmospheres of Kepler Planets with High-Precision Photometry
- A Possible Carbon-rich Interior in Super-Earth 55 Cancri e
- The Kepler-10 planetary system revisited by HARPS-N: A hot rocky world and a solid Neptune-mass planet
- Born Dry in the Photo-Evaporation Desert: Kepler's Ultra-Short-Period Planets Formed Water-Poor
- Minimum Radii of Super-Earths: Constraints from Giant Impacts
- Atmosphere-interior exchange on hot rocky exoplanets
- A grid of upper atmosphere models for 1--40 MEARTH planets: application to CoRoT-7 b and HD219134 b,c
- Theoretical Emission Spectra of Atmospheres of Hot Rocky Super-Earths
- Vaporization of the Earth: Application to Exoplanet Atmospheres
- Theoretical Spectra of Terrestrial Exoplanet Surfaces
- The 55 Cnc system reassessed
- Mass-loss rates for transiting exoplanets
- Probing the Blow-Off Criteria of Hydrogen-Rich "Super-Earths"
- Coreless Terrestrial Exoplanets
- Homogeneous Analysis of Hot Earths: Masses, Sizes, and Compositions
- Chemistry in an Evolving Protoplanetary Disk: Effects on Terrestrial Planet Composition
- Near-infrared absorption properties of oxygen-rich stardust analogues: The influence of coloring metal ions
- Search for water in a super-Earth atmosphere: High-resolution optical spectroscopy of 55 Cancri e
- Search for an exosphere in sodium and calcium in the transmission spectrum of exoplanet 55 Cancri e
- The orbital phases and secondary transit of Kepler-10b - A physical interpretation based on the Lava-ocean planet model -
- Revised Masses and Densities of the Planets around Kepler-10
- Accurate parameters of the oldest known rocky-exoplanet hosting system: Kepler-10 revisited
- Spectral variability on primitive asteroids of the Themis and Beagle families: space weathering effects or parent body heterogeneity?
- The Albedos of Kepler's Close-in super-Earths
- Modeling the albedo of Earth-like magma ocean planets with H2O-CO2 atmospheres
- Cloud formation in metal-rich atmospheres of hot super-Earths like 55 Cnc e and CoRot7b
- Low Albedo Surfaces of Lava Worlds
- Equation of state of SiC at extreme conditions: new insight into the interior of carbon rich exoplanets
- Some optical properties of graphite from IR to millimetric wavelengths
- Mineralogy, structure and habitability of carbon-enriched rocky exoplanets: A laboratory approach
- Carbonates in space - The challenge of low temperature data
- Photo-evaporation of close-in gas giants orbiting around G and M stars
- The Bimodal Distribution in Exoplanet Radii: Considering Varying Core Compositions and Envelope's Sizes
- Two Terrestrial Planet Families With Different Origins
- Hot Super-Earths with Hydrogen Atmospheres: A Model Explaining Their Paradoxical Existence
- Capturing the oxidation of silicon carbide in rocky exoplanetary interiors
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- GJ 1252b: A Hot Terrestrial Super-Earth With No Atmosphere
- K2 and Spitzer phase curves of the rocky ultra-short-period planet K2-141 b hint at a tenuous rock vapor atmosphere
- ARES V: No Evidence For Molecular Absorption in the HST WFC3 Spectrum of GJ 1132 b
- Super-Earths and Earth-like Exoplanets
- The three regimes of atmospheric evaporation for super-Earths and sub-Neptunes
- Probing Kepler's hottest small planets via homogeneous search and analysis of optical secondary eclipses and phase variations
- Detectability of Rocky-Vapour Atmospheres on Super-Earths with Ariel
- The GALAH Survey: Improving our understanding of confirmed and candidate planetary systems with large stellar surveys
- RAPOC : the Rosseland and Planck opacity converter. A user-friendly and fast opacity program for Python
- On the Efficacy of Ocean Formation with a Primordial Hydrogen Atmosphere
- Idealised 3D simulations of diabatically-forced Ledoux convection. Application to the atmosphere of hot rocky exoplanets