Results 21 to 30 of about 140,874 (259)

Optical properties of organic haze analogues in water-rich exoplanet atmospheres observable with JWST [PDF]

open access: yesNature Astronomy, 2023
The James Webb Space Telescope (JWST) has begun its scientific mission, which includes the atmospheric characterization of transiting exoplanets. Some of the first exoplanets to be observed by JWST have equilibrium temperatures below 1,000 K, which is a ...
Chao He   +11 more
semanticscholar   +1 more source

A JWST NIRSpec Phase Curve for WASP-121b: Dayside Emission Strongest Eastward of the Substellar Point and Nightside Conditions Conducive to Cloud Formation

open access: yesThe Astrophysical Journal Letters, 2023
We present the first exoplanet phase-curve measurement made with the JWST NIRSpec instrument, highlighting the exceptional stability of this newly commissioned observatory for exoplanet climate studies.
Thomas Mikal-Evans   +12 more
doaj   +1 more source

ExoMDN: Rapid characterization of exoplanet interior structures with Mixture Density Networks [PDF]

open access: yesAstronomy & Astrophysics, 2023
Characterizing the interior structure of exoplanets is essential for understanding their diversity, formation, and evolution. As the interior of exoplanets is inaccessible to observations, an inverse problem must be solved, where numerical structure ...
Philipp Baumeister, N. Tosi
semanticscholar   +1 more source

Classification of Trajectories in a Two-planet Exosystem Using the Generalized Three-body Problem

open access: yesThe Astrophysical Journal, 2023
We deploy the theory of the generalized three-body problem to describe an exosystem composed of a host star, a transiting Jupiter-sized exoplanet, and an Earth-sized exoplanet.
Eman M. Moneer   +5 more
doaj   +1 more source

Large Interferometer For Exoplanets (LIFE). IX. Assessing the impact of clouds on atmospheric retrievals at mid-infrared wavelengths with a Venus-twin exoplanet [PDF]

open access: yesAstronomy & Astrophysics, 2023
The Large Interferometer For Exoplanets (LIFE) initiative aims to develop a space based mid-infrared (MIR) nulling interferometer to measure the thermal emission spectra of temperate terrestrial exoplanets. We investigate how well LIFE could characterize
B. Konrad   +12 more
semanticscholar   +1 more source

Exoplanet Statistics and Theoretical Implications [PDF]

open access: yesAnnual Review of Astronomy and Astrophysics, 2021
In the past few years, significant advances have been made in understanding the distributions of exoplanet populations and the architecture of planetary systems.
Wei Zhu, S. Dong
semanticscholar   +1 more source

The Impact of the Free-floating Planet Mass Function on the Event Rate for Accurate Microlensing Parallax Determination: Application to Euclid and Roman Parallax Observation

open access: yesThe Astronomical Journal, 2023
A microlensing event is mainly used to search for free-floating planets (FFPs). To estimate the FFP mass and distance via the microlensing effect, a microlensing parallax is one of the key parameters.
M. Ban
doaj   +1 more source

Fizzy Super-Earths: Impacts of Magma Composition on the Bulk Density and Structure of Lava Worlds

open access: yesThe Astrophysical Journal, 2023
Lava worlds are a potential emerging population of Super-Earths that are on close-in orbits around their host stars, with likely partially molten mantles. To date, few studies have addressed the impact of magma on the observed properties of a planet.
Kiersten M. Boley   +5 more
doaj   +1 more source

Prebiosignature Molecules Can Be Detected in Temperate Exoplanet Atmospheres with JWST [PDF]

open access: yesAstronomical Journal, 2023
The search for biosignatures on exoplanets connects the fields of biology and biochemistry to astronomical observation, with the hope that we might detect evidence of active biological processes on worlds outside the solar system.
A. Claringbold   +3 more
semanticscholar   +1 more source

Classify and Explore the Diversity of Planetary Population and Interior Properties

open access: yesThe Astrophysical Journal, 2023
Classification is an essential method and has been developed widely in astronomy. However, planets still lack a universal classification framework, because the solar system planet sample is too small for statistical analysis.
Xiaoming Jiang   +3 more
doaj   +1 more source

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