Extrasolar Planets


Water Is Common Yet Scarce In Exoplanets

Water Is Common Yet Scarce In Exoplanets

The most extensive survey of atmospheric chemical compositions of exoplanets to date has revealed trends that challenge current theories of planet formation and has implications for the search for water in the solar system and beyond.


Retrieving Exoplanet Atmospheric Winds From High-resolution Spectroscopy

Retrieving Exoplanet Atmospheric Winds From High-resolution Spectroscopy

The atmosphere of exoplanets has been studied extensively in recent years, using numerical models to retrieve chemical composition, dynamical circulation or temperature from data.


Novel Method Proposed To Find Atmospheres On Rocky Worlds

Novel Method Proposed To Find Atmospheres On Rocky Worlds

When NASA's James Webb Space Telescope launches in 2021, one of its most anticipated contributions to astronomy will be the study of exoplanets -- planets orbiting distant stars.


Detection Of Na, K And H2O In The Hazy Atmosphere Of WASP-6b

Detection Of Na, K And H2O In The Hazy Atmosphere Of WASP-6b

We present new observations of the transmission spectrum of the hot Jupiter WASP-6b both from the ground with the Very Large Telescope (VLT) FOcal Reducer and Spectrograph (FORS2) from 0.45-0.83 μm, and space with the Transiting Exoplanet Survey Satellite (TESS) from 0.6-1.0 μm and the Hubble Space Telescope (HST) Wide Field Camera 3 from 1.12-1.65 μm.


Machine Learning Inference Of The Interior Structure of Low-mass Exoplanets

Machine Learning Inference Of The Interior Structure of Low-mass Exoplanets

We explore the application of machine learning based on mixture density neural networks (MDNs) to the interior characterization of low-mass exoplanets up to 25 Earth masses constrained by mass, radius, and fluid Love number k2.


An Extremely Low-density And Temperate Giant Exoplanet

An Extremely Low-density And Temperate Giant Exoplanet

Transiting extrasolar planets are key objects in the study of the formation, migration, and evolution of planetary systems. In particular, the exploration of the atmospheres of giant planets, through transmission spectroscopy or direct imaging, has revealed a large diversity in their chemical composition and physical properties.


The Compositional Diversity of Low-Mass Exoplanets

The Compositional Diversity of Low-Mass Exoplanets

Low-mass planets have an extraordinarily diverse range of bulk compositions, from primarily rocky worlds to those with deep gaseous atmospheres.


Multilayer Perceptron and Geometric Albedo Spectra for Quick Parameter Estimations of Exoplanets

Multilayer Perceptron and Geometric Albedo Spectra for Quick Parameter Estimations of Exoplanets

Future space telescopes now in the concept and design stage aim to observe reflected light spectra of extrasolar planets.


Quantifying the Influence of Jupiter on the Earth's Orbital Cycles

Quantifying the Influence of Jupiter on the Earth's Orbital Cycles

A wealth of Earth-sized exoplanets will be discovered in the coming years, proving a large pool of candidates from which the targets for the search for life beyond the Solar system will be chosen.


Identify Exo-Earth Candidates in Direct Imaging Data Through Bayesian Classification

Identify Exo-Earth Candidates in Direct Imaging Data Through Bayesian Classification

Future space telescopes may be able to directly image ∼10 - 100 planets with sizes and orbits consistent with habitable surface conditions ("exo-Earth candidates" or EECs), but observers will face difficulty in distinguishing these from the potentially hundreds of non-habitable "false positives" which will also be detected.


Circumbinary Exoplanets And Brown Dwarfs With LISA

Circumbinary Exoplanets And Brown Dwarfs With LISA

We explore here the prospects for detection of both giant circumbinary exoplanets, and brown dwarfs orbiting Galactic double white dwarfs binaries (DWDs) with the LISA mission.


Wavefront Error Tolerancing For Direct Imaging Of Exo-Earths With A Large Segmented Telescope In Space

Wavefront Error Tolerancing For Direct Imaging Of Exo-Earths With A Large Segmented Telescope In Space

Direct imaging of exo-Earths and search for life is one of the most exciting and challenging objectives for future space observatories.


A Virtual Planet Simulator for Modeling Distant Worlds Across Time

A Virtual Planet Simulator for Modeling Distant Worlds Across Time

University of Washington astrobiologist Rory Barnes has created software that simulates multiple aspects of planetary evolution across billions of years, with an eye toward finding and studying potentially habitable worlds.


Energy Budgets for Terrestrial Extrasolar Planets

Energy Budgets for Terrestrial Extrasolar Planets

The pathways through which incoming energy is distributed between the surface and atmosphere has been analyzed for the Earth. However, the effect of the spectral energy distribution of a host star on the energy budget of an orbiting planet may be significant given the wavelength-dependent absorption properties of atmospheric CO2 and water vapor, and surface ice and snow.


An Automated Method to Detect Transiting Circumbinary Planets

An Automated Method to Detect Transiting Circumbinary Planets

To date a dozen transiting "Tatooines" or circumbinary planets (CBPs) have been discovered, by eye, in the data from the Kepler mission; by contrast, thousands of confirmed circumstellar planets orbiting around single stars have been detected using automated algorithms.


How Many Earth-like Planets Are Around Sun-like Stars?

How Many Earth-like Planets Are Around Sun-like Stars?

A new study provides the most accurate estimate of the frequency that planets that are similar to Earth in size and in distance from their host star occur around stars similar to our Sun.


Red Dots: A Temperate 1.5 Earth-mass Planet In A Compact Multi-terrestrial Planet System Around GJ1061

Red Dots: A Temperate 1.5 Earth-mass Planet In A Compact Multi-terrestrial Planet System Around GJ1061

Small low-mass stars are favourable targets for the detection of rocky habitable planets. In particular, planetary systems in the solar neighbourhood are interesting and suitable for precise characterisation. The Red Dots campaigns seek to discover rocky planets orbiting nearby low-mass stars.


Identifying Atmospheres on Rocky Exoplanets Through Inferred High Albedo

Identifying Atmospheres on Rocky Exoplanets Through Inferred High Albedo

The upcoming launch of the James Webb Space Telescope (JWST) means that we will soon have the capability to characterize the atmospheres of rocky exoplanets.


A Scaling Theory for Atmospheric Heat Redistribution on Rocky Exoplanets

A Scaling Theory for Atmospheric Heat Redistribution on Rocky Exoplanets

Atmospheric heat redistribution shapes the remote appearance of rocky exoplanets but there is currently no easy way to predict a planet's heat redistribution from its physical properties.


Two Earth-like Planets Discovered Near Teegarden's Star

Two Earth-like Planets Discovered Near Teegarden's Star

An international research team led by the University of Göttingen has discovered two new Earth-like planets near one of our closest neighboring stars.



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