Extrasolar Planets


Exoplanet Atmospheric Chemistry on Paper

Exoplanet Atmospheric Chemistry on Paper

Normally computers speed up calculations. But with his new pen-and-paper formula Kevin Heng of the University of Bern gets his results thousands of times faster than using conventional computer codes.


Temperate Earth-sized Planets Transiting a Nearby Ultracool Dwarf Star

Temperate Earth-sized Planets Transiting a Nearby Ultracool Dwarf Star

Star-like objects with effective temperatures of less than 2,700 kelvin are referred to as ultracool dwarfs.


Night Side Cooling and Surface Friction Affect Climates of Tidally Locked Terrestrial Planets

Night Side Cooling and Surface Friction Affect Climates of Tidally Locked Terrestrial Planets

We investigate how night side cooling and surface friction impact surface temperatures and large scale circulation for tidally locked Earth-like planets.


Connecting Disk Astrochemistry to the Formation of Planetary Atmospheres

Connecting Disk Astrochemistry to the Formation of Planetary Atmospheres

We present a model of early planetary atmospheres which represents the cumulative gaseous chemical species that are accreted onto planets forming by core accretion from an evolving protoplanetary disk.


Effects of Proxima Centauri on Planet Formation in Alpha Centauri

Effects of Proxima Centauri on Planet Formation in Alpha Centauri

Proxima Centauri is an M dwarf approximately 15,000 AU from the Alpha Centauri binary, comoving and likely in a loosely bound orbit.


First Sighting Of A Water Snow Line Around A Young Star

First Sighting Of A Water Snow Line Around A Young Star

Young stars are often surrounded by dense, rotating discs of gas and dust, known as protoplanetary discs, from which planets are born.


ALMA Observations of the Debris Disk of Solar Analogue Tau Ceti

ALMA Observations of the Debris Disk of Solar Analogue Tau Ceti

We present 1.3 mm observations of the Sun-like star τ Ceti with the Atacama Large Millimeter/submillimeter Array (ALMA) that probe angular scales of ∼1'' (4 AU).


Investigating The Free-floating Planet Mass by Euclid Observations

Investigating The Free-floating Planet Mass by Euclid Observations

The detection of anomalies in gravitational microlensing events is nowadays one of the main goals among the microlensing community.


An Anthropic Prediction for the Prevalence of Water Worlds

An Anthropic Prediction for the Prevalence of Water Worlds

Should we expect most habitable planets to share the Earth's marbled appearance? Terrestrial planets within the habitable zone are thought to display a broad range of water compositions, due to the stochastic nature of water delivery.


Water Clouds Found In Coldest Brown Dwarf's Spectrum

Water Clouds Found In Coldest Brown Dwarf's Spectrum

Since its detection in 2014, the brown dwarf known as WISE 0855 has fascinated astronomers. Only 7.2 light-years from Earth, it is the coldest known object outside of our solar system and is just barely visible at infrared wavelengths with the largest ground-based telescopes.


The Formation and Chemical Composition of Super Earths

The Formation and Chemical Composition of Super Earths

Super Earths are the largest population of exoplanets and are seen to exhibit a rich diversity of compositions as inferred through their mean densities.


EXPRES: A Next Generation RV Spectrograph in the Search for Earth-like Worlds

EXPRES: A Next Generation RV Spectrograph in the Search for Earth-like Worlds

The EXtreme PREcision Spectrograph (EXPRES) is an optical fiber fed echelle instrument being designed and built at the Yale Exoplanet Laboratory to be installed on the 4.3-meter Discovery Channel Telescope operated by Lowell Observatory.


Cloudy Days on Exoplanets May Hide Atmospheric Water

Cloudy Days on Exoplanets May Hide Atmospheric Water

Water is a hot topic in the study of exoplanets, including "hot Jupiters," whose masses are similar to that of Jupiter, but which are much closer to their parent star than Jupiter is to the sun.


Hot Atmospheres Could Limit Number of Habitable Planets

Hot Atmospheres Could Limit Number of Habitable Planets

New research has revealed that fewer than predicted planets may be capable of harbouring life because their atmospheres keep them too hot.


Habitable Worlds With JWST: Transit Spectroscopy of the TRAPPIST-1 System?

Habitable Worlds With JWST: Transit Spectroscopy of the TRAPPIST-1 System?

The recent discovery of three Earth-sized, potentially habitable planets around a nearby cool star, TRAPPIST-1, has provided three key targets for the upcoming James Webb Space Telescope (JWST).


Impact of Secular Resonances on Habitable Zones in Circumstellar Planetary Systems of Known Binary Stars

Impact of Secular Resonances on Habitable Zones in Circumstellar Planetary Systems of Known Binary Stars

We present a survey on binary star systems with stellar separations less than 100 astronomical units.


Using Kepler Candidates to Examine the Properties of Habitable Zone Exoplanets

Using Kepler Candidates to Examine the Properties of Habitable Zone Exoplanets

An analysis of the currently known exoplanets in the habitable zones (HZs) of their host stars is of interest in both the wake of the NASA Kepler mission and with prospects for expanding the known planet population through future ground- and space-based projects.


Probability of CME Impact on Exoplanets Orbiting M Dwarfs and Solar-Like Stars

Probability of CME Impact on Exoplanets Orbiting M Dwarfs and Solar-Like Stars

Solar coronal mass ejections (CMEs) produce adverse space weather effects at Earth. Planets in the close habitable zone of magnetically active M dwarfs may experience more extreme space weather than at Earth, including frequent CME impacts leading to atmospheric erosion and leaving the surface exposed to extreme flare activity.


Kepler Confirms 1,284 New Planets

Kepler Confirms 1,284 New Planets

Scientists from Princeton University and NASA have confirmed that 1,284 objects observed outside Earth's solar system by NASA's Kepler spacecraft are indeed planets.


Temperature Structure and Atmospheric Circulation of Dry, Tidally Locked Rocky Exoplanets

Temperature Structure and Atmospheric Circulation of Dry, Tidally Locked Rocky Exoplanets

Next-generation space telescopes will observe the atmospheres of rocky planets orbiting nearby M-dwarfs. Understanding these observations will require well-developed theory in addition to numerical simulations.



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