Persistence of Flare-Driven Atmospheric Chemistry on Rocky Habitable Zone Worlds

Abstract

Low-mass stars show evidence of vigorous magnetic activity in the form of large flares and coronal mass ejections. Such space weather events may have important ramifications for the habitability and observational fingerprints of exoplanetary atmospheres. Here, using a suite of three-dimensional coupled chemistry-climate model (CCM) simulations, we explore effects of time-dependent stellar activity on rocky planet atmospheres orbiting G-, K-, and M-dwarf stars. We employ observed data from the MUSCLES campaign and Transiting Exoplanet Satellite Survey and test a range of rotation period, magnetic field strength, and flare frequency assumptions. We find that recurring flares drive K- and M-dwarf planet atmospheres into chemical equilibria that substantially deviate from their pre-flare regimes, whereas G-dwarf planet atmospheres quickly return to their baseline states. 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. Applying a radiative transfer model to our CCM results, we find that flare-driven transmission features of bio-indicating species, such as nitrogen dioxide, nitrous oxide, and nitric acid, show particular promise for detection by future instruments.

arXiv comment27 pages, 14 figures total, 6 main text figures, 8 extended data figures, updated to the published version in the March 2021 Issue of Nature Astronomy; Volume 5, Pages 298-310; the published version is available at https://www.nature.com/articles/s41550-020-01264-1

References in corpus (66)

• The Transiting Exoplanet Survey Satellite
• A new extensive library of PHOENIX stellar atmospheres and synthetic spectra
• Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Southern Sample
• Exoplanet Biosignatures: A Review of Remotely Detectable Signs of Life
• The Effect of a Strong Stellar Flare on the Atmospheric Chemistry of an Earth-like Planet Orbiting an M dwarf
• The MUSCLES Treasury Survey I: Motivation and Overview
• Stabilizing Cloud Feedback Dramatically Expands the Habitable Zone of Tidally Locked Planets
• Kepler Flares I. Active and Inactive M dwarfs
• Stellar Flares from the First Tess Data Release: Exploring a New Sample of M-dwarfs
• The Kepler Catalog of Stellar Flares
• Was Venus the First Habitable World of our Solar System?
• Properties of Ground Level Enhancement Events and the Associated Solar Eruptions during Solar Cycle 23
• A revised estimate of the occurrence rate of terrestrial planets in the habitable zones around kepler m-dwarfs
• Time-Resolved Properties and Global Trends in dMe Flares from Simultaneous Photometry and Spectra
• The MUSCLES Treasury Survey II: Intrinsic Lyman Alpha and Extreme Ultraviolet Spectra of K and M Dwarfs with Exoplanets
• The Exoplanet Population Observation Simulator. I - The Inner Edges of Planetary Systems
• Impact of Space Weather on Climate and Habitability of Terrestrial Type Exoplanets
• The inner edge of the habitable zone for synchronously rotating planets around low-mass stars using general circulation models
• The MUSCLES Treasury Survey III: X-ray to Infrared Spectra of 11 M and K Stars Hosting Planets
• Modeling Repeated M-dwarf Flaring at an Earth-like Planet in the Habitable Zone: I. Atmospheric Effects for an Unmagnetized Planet
• Occurrence Rates of Planets orbiting FGK Stars: Combining Kepler DR25, Gaia DR2 and Bayesian Inference
• Habitable Moist Atmospheres On Terrestrial Planets Near the Inner Edge Of the Habitable Zone Around M-dwarfs
• Activity and Kinematics of Ultracool Dwarfs Including An Amazing Flare Observation
• Disequilibrium biosignatures over Earth history and implications for detecting exoplanet life
• The MUSCLES Treasury Survey. V. FUV Flares on Active and Inactive M Dwarfs
• Flares from small to large: X-ray spectroscopy of Proxima Centauri with XMM-Newton
• Flare Statistics for Young Stars from a Convolutional Neural Network Analysis of $\text{TESS}$ Data
• Impact of Clouds and Hazes on the Simulated JWST Transmission Spectra of Habitable Zone Planets in the TRAPPIST-1 System
• Habitable Climate Scenarios for Proxima Centauri b With a Dynamic Ocean
• Planetary evolution with atmospheric photoevaporation I. Analytical derivation and numerical study of the evaporation valley and transition from super-Earths to sub-Neptunes
• The MUSCLES Treasury Survey IV: Scaling Relations for Ultraviolet, Ca II K, and Energetic Particle Fluxes from M Dwarfs
• Exoplanet secondary atmosphere loss and revival
• Superflare occurrence and energies on G-, K- and M-type dwarfs
• Predicting the Extreme Ultraviolet Radiation Environment of Exoplanets Around Low-Mass Stars: the TRAPPIST-1 System
• A review of possible planetary atmospheres in the TRAPPIST-1 system
• HAZMAT. IV. Flares and Superflares on Young M Stars in the Far Ultraviolet
• Atmospheric effects of stellar cosmic rays on Earth-like exoplanets orbiting M-dwarfs
• No snowball on habitable tidally locked planets
• Influence of Stellar Flares on the Chemical Composition of Exoplanets and Spectra
• Predicted Number, Multiplicity, and Orbital Dynamics of TESS M Dwarf Exoplanets
• Simultaneous optical and X-ray observations of a giant flare on the ultracool dwarf LP412-31
• Ocean Dynamics and the Inner Edge of the Habitable Zone for Tidally Locked Terrestrial Planets
• An Observational Diagnostic for Distinguishing Between Clouds and Haze in Hot Exoplanet Atmospheres
• Clouds will likely prevent the detection of water vapor in JWST transmission spectra of terrestrial exoplanets
• Habitability and Spectroscopic Observability of Warm M-dwarf Exoplanets Evaluated with a 3D Chemistry-Climate Model
• Spectrum-driven Planetary Deglaciation Due to Increases in Stellar Luminosity
• Terrestrial Consequences of Spectral and Temporal Variability in Ionizing Photon Events
• Oceanographic Considerations for Exoplanet Life Detection
• Impact of Stellar Superflares on Planetary Habitability
• Dim Prospects for Transmission Spectra of Ocean Earths Around M Stars
• The dehydration of water worlds via atmospheric losses
• Modeling Stellar Proton Event-induced particle radiation dose on close-in exoplanets
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• Stratospheric Temperatures and Water Loss from Moist Greenhouse Atmospheres of Earth-like Planets
• Biosignature Anisotropy Modeled on Temperate Tidally Locked M-dwarf Planets
• Ozone chemistry on tidally locked M dwarf planets
• Atmospheric Beacons of Life from Exoplanets Around G and K Stars
• No Snowball on Habitable Tidally Locked Planets with a Dynamic Ocean
• The Effect of Substellar Continent Size on Ocean Dynamics of Proxima Centauri b
• A New Model Suite to Determine the Influence of Cosmic Rays on (Exo)planetary Atmospheric Biosignatures -- Validation based on Modern Earth
• Simulated Phase-dependent Spectra of Terrestrial Aquaplanets in M Dwarf Systems
• Frequency of Coronal Mass Ejection Impacts with Early Terrestrial Planets and Exoplanets Around Active Solar-like Stars
• A Coupled Analysis of Atmospheric Mass Loss and Tidal Evolution in XUV Irradiated Exoplanets: the TRAPPIST-1 Case Study
• Predicted Yield of Transits of Known Radial Velocity Exoplanets from the TESS Primary and Extended Missions

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