Extrasolar Planets


Forming 'Fast And Furious' Planets Around Tiny Stars

Forming 'Fast And Furious' Planets Around Tiny Stars

New astronomy research from the University of Central Lancashire (UCLan) suggests giant planets could form around small stars much faster than previously thought.


The Paradox Of Youth For ALMA Planet Candidates

The Paradox Of Youth For ALMA Planet Candidates

Recent ALMA observations indicate that the majority of bright protoplanetary discs show signatures of young moderately massive planets.


How The Solar System Got Its 'Great Divide,' And Why It Matters For Life On Earth

How The Solar System Got Its 'Great Divide,' And Why It Matters For Life On Earth

Scientists, including those from the University of Colorado Boulder, have finally scaled the solar system's equivalent of the Rocky Mountain range.


MCMCI: A Code To Fully Characterize An Exoplanetary System

MCMCI: A Code To Fully Characterize An Exoplanetary System

By analysing the transit LC of a planet-hosting star or the induced RV oscillations, many useful information on the planet may be retrieved. However, inferring the physical parameters of the planet (mass, size, semi-major axis, etc.) requires the preliminary knowledge of some parameters of the host star, especially its mass and/or radius, that are generally inferred through theoretical evolutionary models.


Detection of Dive New Planets, Eight Planet Candidates, and Confirmation of Three Planets Around Nine Nearby M Dwarfs

Detection of Dive New Planets, Eight Planet Candidates, and Confirmation of Three Planets Around Nine Nearby M Dwarfs

Zechmeister et al. (2009) surveyed 38 nearby M dwarfs from March 2000 to March 2007 with VLT2 and the UVES spectrometer. This data has recently been reanalyzed (Butler et al. 2019), yielding a significant improvement in the Doppler velocity precision.


There's No Place Like Home (in Our Own Solar System): Searching for ET Near White Dwarfs

There's No Place Like Home (in Our Own Solar System): Searching for ET Near White Dwarfs

The preponderance of white dwarfs in the Milky Way were formed from the remnants of stars of the same or somewhat higher mass as the Sun, i.e., from G-stars. We know that life can exist around G-stars.


Can Close-in Giant Exoplanets Preserve Detectable Moons?

Can Close-in Giant Exoplanets Preserve Detectable Moons?

Exoplanet discoveries have motivated numerous efforts to find unseen populations of exomoons, yet they have been unsuccessful. A plausible explanation is that most discovered planets are located on close-in orbits, which would make their moons prone to tidal evolution and orbital detachment.


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.



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