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Extreme water loss and abiotic O2 buildup on planets throughout the habitable zones of M dwarfs.
In general, it is found that the initial phase of high luminosity may compromise the habitability of many terrestrial planets orbiting low-mass stars.
A seven-planet resonant chain in TRAPPIST-1
The TRAPPIST-1 system is the first transiting planet system found orbiting an ultra-cool dwarf star. At least seven planets similar to Earth in radius and in mass were previously found to transit
EVEREST: Pixel Level Decorrelation of K2 Light curves
We present EVEREST, an open-source pipeline for removing instrumental noise from K2 light curves. EVEREST employs a variant of pixel level decorrelation (PLD) to remove systematics introduced by the
An Update to the EVEREST K2 Pipeline: Short Cadence, Saturated Stars, and Kepler-like Photometry Down to Kp = 15
We present an update to the EVEREST K2 pipeline that addresses various limitations in the previous version and improves the photometric precision of the de-trended light curves. We develop a fast
Habitable evaporated cores: transforming mini-Neptunes into super-Earths in the habitable zones of M dwarfs.
We show that photoevaporation of small gaseous exoplanets ("mini-Neptunes") in the habitable zones of M dwarfs can remove several Earth masses of hydrogen and helium from these planets and transform
Evolved Climates and Observational Discriminants for the TRAPPIST-1 Planetary System
The TRAPPIST-1 planetary system provides an unprecedented opportunity to study terrestrial exoplanet evolution with the James Webb Space Telescope (JWST) and ground-based observatories. Since M dwarf
EXOFASTv2: A public, generalized, publication-quality exoplanet modeling code
The next generation public exoplanet fitting software, EXOFASTv2, is presented and several state-of-the-art ways to constrain its properties are provided, including taking advantage of the now-ubiquitous all-sky catalog photometry and Gaia parallaxes.
The Habitability of Proxima Centauri b I: Evolutionary Scenarios
We analyze the evolution of the potentially habitable planet Proxima Centauri b to identify environmental factors that affect its long-term habitability. We consider physical processes acting on size
The Habitability of Proxima Centauri b: Environmental States and Observational Discriminants
1-D coupled climate-photochemical models are used to generate self-consistent atmospheres for several evolutionary scenarios, including high-O2, high-CO2, and more Earth-like atmospheres, with both oxic and anoxic compositions, and show that these modeled environments can be habitable or uninhabitable at Proxima Cen b's position in the habitable zone.
If JWST-NIRISS and/or NIRSpec observe CO in conjunction with CO2 in the transmission spectrum of a terrestrial planet it could indicate robust CO2 photolysis and suggest that a future detection of O2 or O3 might not be biogenic, the first explicit self-consistent simulations of these spectral discriminants as they may be seen by James Webb Space Telescope are produced.