A critical component of exoplanetary studies is an exhaustive characterization of the host star, from which the planetary properties are frequently derived. Of particular value are the radius, temperature, and […]
extrasolar
Posted inExoplanets, -moons, -comets, Press Release
Searching Through a Sea of Noise to Find Exoplanets
Yale researchers have found a data-driven way to detect distant planets and refine the search for worlds similar to Earth. The new approach, outlined in a study published Dec. 20 […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Press Release
A Framework to Combine Low- and High-resolution Spectroscopy for the Atmospheres of Transiting Exoplanets
Current observations of the atmospheres of close-in exoplanets are predominantly obtained with two techniques: low-resolution spectroscopy with space telescopes and high-resolution spectroscopy from the ground. Although the observables delivered by […]
Posted inExoplanets, -moons, -comets, Habitable Zones, Press Release
Detection of the Atmosphere of the 1.6 Earth Mass Exoplanet GJ 1132b
Detecting the atmospheres of low-mass low-temperature exoplanets is a high-priority goal on the path to ultimately detect biosignatures in the atmospheres of habitable exoplanets. High-precision HST observations of several super-Earths […]
Posted inAstrochemistry, Exoplanets, -moons, -comets, Press Release
Cloud Formation in Carbon- and Oxygen-rich Environment
Recent observations indicate potentially carbon-rich exoplanet atmospheres. Spectral fitting methods for brown dwarfs and exoplanets have invoked the C/O ratio as additional parameter but carbon-rich cloud formation modeling is a […]
Posted inExoplanets, -moons, -comets, Habitable Zones, Press Release
On the Possibility of Habitable Trojan Planets in Binary Star Systems
Approximately 60 percent of all stars in the solar neighbourhood (up to 80 percent in our Milky Way) are members of binary or multiple star systems. This fact led to […]
Posted inExoplanets, -moons, -comets, Habitable Zones, Press Release
Effects of Variable Eccentricity on the Climate of an Earth-like World
The Kepler era of exoplanetary discovery has presented the Astronomical community with a cornucopia of planetary systems very different from the one which we inhabit. It has long been known […]
Posted inExoplanets, -moons, -comets, Habitable Zones, Press Release
Rotation of Planets Hosting Atmospheric Tides: From Venus to Habitable Super-Earths
The competition between the torques induced by solid and thermal tides drives the rotational dynamics of Venus-like planets and super-Earths orbiting in the habitable zone of low-mass stars. The tidal […]
Posted inExoplanets, -moons, -comets, Press Release
Close-in, low-mass planet candidates and evidence of planet accretion in the solar twin HIP 68468
[Methods]. We obtained high-precision radial velocities with HARPS on the ESO 3.6 m telescope and determined precise stellar elemental abundances (~0.01 dex) using MIKE spectra on the Magellan 6.5m telescope. […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Press Release
Sub-milli-Kelvin Instruments – Radial Velocity Measurements: Tests with the Habitable-zone Planet Finder
Insufficient instrument thermo-mechanical stability is one of the many roadblocks for achieving 10cm/s Doppler radial velocity (RV) precision, the precision needed to detect Earth-twins orbiting Solar-type stars. Highly temperature and […]