Extrasolar Planets: October 2020

A large fraction of stars are formed in dense clusters. In the cluster, close encounters between stars at distances less than 100 au are common.

We show that in extremely irradiated atmospheres of hot super-Earths shortwave absorption of CN can cause strong temperature inversions.

Most of our current knowledge on planet formation is still based on the analysis of main-sequence, solar-type stars.

Australian scientists have developed a new type of sensor to measure and correct the distortion of starlight caused by viewing through the Earth's atmosphere, which should make it easier to study the possibility of life on distant planets.

Transit observations have found the majority of exoplanets to date. Spectroscopic observations of transits and eclipses are the most commonly used tool to characterize exoplanet atmospheres and will be used in the search for life.

We provide a new framework to model the day side and night side atmospheres of irradiated exoplanets using 1-D radiative transfer by incorporating a self-consistent heat flux carried by circulation currents (winds) between the two sides.

The detection of exoplanets in high-contrast imaging (HCI) data hinges on post-processing methods to remove spurious light from the host star.

With the discovery of TRAPPIST-1 and its seven planets within 0.06 au, the correct treatment of tidal interactions is becoming necessary. The eccentricity, rotation, and obliquity of the planets of TRAPPIST-1 are indeed the result of tidal evolution over the lifetime of the system.

For the time being, Earth remains the best and only example of a habitable (and inhabited) world.

We announce the discovery of two planets orbiting the M dwarfs GJ 251 (0.360±0.015 M⊙) and HD 238090 (0.578±0.021 M⊙) based on CARMENES radial velocity (RV) data.