Extreme Water Loss and Abiotic O2 Buildup on Planets Throughout the Habitable Zones of M Dwarfs
R Luger, R Barnes - Astrobiology, 2015 - liebertpub.com
We show that terrestrial planets in the habitable zones of M dwarfs older than∼ 1 Gyr could
have been in runaway greenhouses for several hundred million years following their …
have been in runaway greenhouses for several hundred million years following their …
Planetary population synthesis coupled with atmospheric escape: a statistical view of evaporation
We apply hydrodynamic evaporation models to different synthetic planet populations that
were obtained from a planet formation code based on the core-accretion paradigm. We …
were obtained from a planet formation code based on the core-accretion paradigm. We …
Water loss from terrestrial planets orbiting ultracool dwarfs: implications for the planets of TRAPPIST-1
Ultracool dwarfs (UCD; T eff<∼ 3000 K) cool to settle on the main sequence after∼ 1 Gyr.
For brown dwarfs, this cooling never stops. Their habitable zones (HZ) thus sweeps inward …
For brown dwarfs, this cooling never stops. Their habitable zones (HZ) thus sweeps inward …
Atmospheric escape processes and planetary atmospheric evolution
The habitability of the surface of any planet is determined by a complex evolution of its
interior, surface, and atmosphere. The electromagnetic and particle radiation of stars drive …
interior, surface, and atmosphere. The electromagnetic and particle radiation of stars drive …
Atmospheric regimes and trends on exoplanets and brown dwarfs
X Zhang - Research in Astronomy and Astrophysics, 2020 - iopscience.iop.org
A planetary atmosphere is the outer gas layer of a planet. Besides its scientific significance
among the first and most accessible planetary layers observed from space, it is closely …
among the first and most accessible planetary layers observed from space, it is closely …
Planetary evolution with atmospheric photoevaporation-II. Fitting the slope of the radius valley by combining boil-off and XUV-driven escape
Context. Observations by the Kepler satellite have revealed a gap between larger sub-
Neptunes and smaller super-Earths that atmospheric escape models had predicted as an …
Neptunes and smaller super-Earths that atmospheric escape models had predicted as an …
Helium-enhanced planets along the upper edge of the radius valley
I Malsky, L Rogers, EMR Kempton, N Marounina - Nature Astronomy, 2023 - nature.com
The Kepler survey revealed that the radius distribution of sub-Neptunes is bimodal: there is
a scarcity of planets between 1.5 and 2.0 R⊕. However, the mechanism that creates the …
a scarcity of planets between 1.5 and 2.0 R⊕. However, the mechanism that creates the …
Origin and loss of nebula-captured hydrogen envelopes from 'sub'-to 'super-Earths' in the habitable zone of Sun-like stars
We investigate the origin and loss of captured hydrogen envelopes from protoplanets having
masses in a range between 'sub-Earth'-like bodies of 0.1 M⊕ and 'super-Earths' with 5 M⊕ …
masses in a range between 'sub-Earth'-like bodies of 0.1 M⊕ and 'super-Earths' with 5 M⊕ …
Habitability of terrestrial-mass planets in the HZ of M Dwarfs–I. H/He-dominated atmospheres
JE Owen, S Mohanty - Monthly Notices of the Royal …, 2016 - academic.oup.com
The ubiquity of M dwarfs, combined with the relative ease of detecting terrestrial-mass
planets around them, has made them prime targets for finding and characterizing planets in …
planets around them, has made them prime targets for finding and characterizing planets in …
Redox evolution via gravitational differentiation on low-mass planets: implications for abiotic oxygen, water loss, and habitability
The oxidation of rocky planet surfaces and atmospheres, which arises from the twin forces of
stellar nucleosynthesis and gravitational differentiation, is a universal process of key …
stellar nucleosynthesis and gravitational differentiation, is a universal process of key …