The great flare of 1985 April 12 on AD Leonis. Atmospheric beacons of life from exoplanets around G and K stars. Impact of stellar superflares on planetary habitability. Modelling stellar proton event-induced particle radiation dose on close-in exoplanets. Northern hemisphere summer mesospheric gravity wave response to solar activity from nine years of aim observation. A coupled analysis of atmospheric mass loss and tidal evolution in XUV irradiated exoplanets: the TRAPPIST-1 case study. Water contents of Earth-mass planets around M dwarfs. Impact of space weather on climate and habitability of terrestrial type exoplanets. Stellar model chromospheres and spectroscopic diagnostics. M stars as targets for terrestrial exoplanet searches and biosignature detection. Predicted yield of transits of known radial velocity exoplanets from the TESS primary and extended missions. Predicted number, multiplicity, and orbital dynamics of TESS M-dwarf exoplanets. Stratospheric temperatures and water loss from moist greenhouse atmospheres of Earth-like planets.
Habitable zones around main sequence stars. The occurrence of rocky habitable zone planets around solar-like stars from Kepler data. Occurrence rates of planets orbiting FGK stars: combining Kepler DR25, Gaia DR2, and Bayesian inference. The exoplanet population observation simulator. A revised estimate of the occurrence rate of terrestrial planets in the habitable zones around Kepler M-dwarfs. Kepler planet-detection mission: introduction and first results. Applying a radiative transfer model to our chemistry–climate model results, we find that flare-driven transmission features of bio-indicating chemical species, such as nitrogen dioxide, nitrous oxide and nitric acid, show particular promise for detection by future instruments.īorucki, W. Interestingly, simulated O 2-poor and O 2-rich atmospheres experiencing flares produce similar mesospheric nitric oxide abundances, suggesting that stellar flares can highlight otherwise undetectable chemical species. We find that recurring flares drive the atmospheres of planets around K and M dwarfs into chemical equilibria that substantially deviate from their pre-flare regimes, whereas the atmospheres of G dwarf planets quickly return to their baseline states. We employ observed data from the MUSCLES campaign and the Transiting Exoplanet Survey Satellite and test a range of rotation period, magnetic field strength and flare frequency assumptions. Here, using a suite of three-dimensional coupled chemistry–climate model simulations, we explore effects of time-dependent stellar activity on rocky planet atmospheres orbiting G, K and M dwarf stars. Such space weather events may have important ramifications for the habitability and observational fingerprints of exoplanetary atmospheres. Low-mass stars show evidence of vigorous magnetic activity in the form of large flares and coronal mass ejections.