Results 101 to 110 of about 17,015 (215)

The Radius Cliff is a Waterfall: Explaining Sub-Neptune Exoplanets with Steam Worlds

The Astrophysical Journal
The demographics of Kepler planets provide a key testbed for models of planet formation and evolution, particularly for explaining the radius valley separating super-Earths and sub-Neptunes.
Aritra Chakrabarty, Gijs D. Mulders, Artyom Aguichine, Natalie Batalha   +3 more
doaj   +1 more source

The Clear Sky Corridor: Insights Towards Aerosol Formation in Exoplanets Using an AI-based Survey of Exoplanet Atmospheres

The Astronomical Journal
Abstract Producing optimized and accurate transmission spectra of exoplanets from telescope data has traditionally been a manual and labor intensive procedure. Here we present the results of the first attempt to improve and standardize this procedure by using artificial-intelligence-based (AI-based) processing of light curves and ...
Reza Ashtari, Kevin B. Stevenson, David Sing, Mercedes López-Morales, Munazza K. Alam, Nikolay K. Nikolov, Thomas M. Evans-Soma   +6 more
openaire   +3 more sources

Architectures of Exoplanetary Systems. IV. A Multiplanet Model for Reproducing the Radius Valley and Intrasystem Size Similarity of Planets around Kepler’s FGK Dwarfs

The Astrophysical Journal
The Kepler-observed distribution of planet sizes has revealed two distinct patterns: (1) a radius valley separating super-Earths and sub-Neptunes and (2) a preference for intrasystem size similarity.
Matthias Y. He, Eric B. Ford
doaj   +1 more source

The Roman Microlensing Survey: Confirmation or Refutation of Gas Giant Exoplanet Formation Theories

The Astrophysical Journal
Exoplanet research has moved from the discovery of new classes of planets toward creating a census of exoplanet population demographics across the spectrum of exoplanet and host star masses.
Alan P. Boss
doaj   +1 more source

Exoplanet formation inference using conditional invertible neural networks

The interpretation of the origin of observed exoplanets is usually done only qualitatively due to uncertainties of key parameters in planet formation models. To allow a quantitative methodology which traces back in time to the planet birth locations, we train recently developed conditional invertible neural networks (cINN) on synthetic data from a ...
Burn, Remo, Ksoll, Victor F., Klahr, Hubert, Henning, Thomas   +3 more
openaire   +2 more sources

Terrestrial Exoplanet Internal Structure Constraints Enabled by Comprehensive Host Star Characterization Reveal That Terrestrial Planets in Mean Motion Resonances Are Water Rich

The Astrophysical Journal
Exoplanet mass and radius inferences fundamentally rely on host star mass and radius inferences. Despite the importance of host star mass, radius, and elemental abundance inferences for the derivation of exoplanet internal structure constraints ...
Alejandra Ross, Henrique Reggiani, Kevin C. Schlaufman, Mykhaylo Plotnykov, Diana Valencia   +4 more
doaj   +1 more source

Formation and evolution of exoplanets in different environments

, 2017
Invited Review. To appear in Astronomical Society of the Pacific (ASP) Conference Series "Non-Stable Universe: Energetic Resources, Activity Phenomena and Evolutionary Processes" dedicated to the 70th anniversary of Byurakan Astrophysical ...
openaire   +2 more sources

Investigating Planet Formation and Evolutionary Processes with Short-Period Exoplanets

, 2018
White Paper submitted to National Academy of Sciences Exoplanet Science Strategy ...
Jackson, B., Adams, E., Heller, R., Endl, M.   +3 more
openaire   +3 more sources

Chemical Mapping of Temperate Sub-Neptune Atmospheres: Constraining the Deep Interior H2O/H2 Ratio from the Atmospheric CO2/CH4 Ratio

The Astrophysical Journal Letters
Understanding the planetary envelope composition of sub-Neptune-type exoplanets is challenging due to the inherent degeneracy in their interior composition scenarios.
Jeehyun Yang, Renyu Hu
doaj   +1 more source

Set to Music, Exoplanets Reveal Insights on Their Formation

Eos, 2019
Sonification hints at how some Kepler planets may have been configured in the late stages of their development.
openaire   +1 more source