Exoplanet secondary atmosphere loss and revival

@article{Kite2020ExoplanetSA,
  title={Exoplanet secondary atmosphere loss and revival},
  author={Edwin Stephen Kite and Megan N. Barnett},
  journal={Proceedings of the National Academy of Sciences},
  year={2020},
  volume={117},
  pages={18264 - 18271}
}
  • E. Kite, M. Barnett
  • Published 3 June 2020
  • Geology, Physics
  • Proceedings of the National Academy of Sciences
Significance Earth and Venus have significant atmospheres, but Mercury does not. Thousands of exoplanets are known, but we know almost nothing about rocky exoplanet atmospheres. Many rocky exoplanets were formed by a sub-Neptune-to-super-Earth conversion process during which planets lose most of their H2-rich (primary) atmospheres and are reduced in volume by a factor of >2. Does such a gas-rich adolescence increase or decrease the likelihood that super-Earths will subsequently exhibit a H2… 

Figures from this paper

The Phase-curve Signature of Condensible Water-rich Atmospheres on Slowly Rotating Tidally Locked Exoplanets
We use an idealized three-dimensional general circulation model to study condensible-rich atmospheres with an ineffective cold trap on slowly rotating tidally locked terrestrial planets. In
Detection of an Atmosphere on a Rocky Exoplanet
We report the detection of an atmosphere on a rocky exoplanet, GJ 1132 b, which is similar to Earth in terms of size and density. The atmospheric transmission spectrum was detected using Hubble WFC3
Hidden Water in Magma Ocean Exoplanets
We demonstrate that the deep volatile storage capacity of magma oceans has significant implications for the bulk composition, interior, and climate state inferred from exoplanet mass and radius data.
A Snowball in Hell: The Potential Steam Atmosphere of TOI-1266c
TOI-1266c is a recently discovered super-Venus in the radius valley orbiting an early M dwarf. However, its notional bulk density (∼2.2 g cm−3) is consistent with a large volatile fraction,
Atmospheric Dynamics of Temperate Sub-Neptunes. I. Dry Dynamics
Sub-Neptunes (planets with radii between 2 and 4 R ⊕) are abundant around M-dwarf stars, yet the atmospheric dynamics of these planets is relatively unexplored. In this paper, we aim to provide a
Detection of Ongoing Mass Loss from HD 63433c, a Young Mini-Neptune
We detect Lyα absorption from the escaping atmosphere of HD 63433c, a R = 2.67R ⊕, P = 20.5 day mini-Neptune orbiting a young (440 Myr) solar analog in the Ursa Major Moving Group. Using Hubble Space
Internal dynamics of magma ocean and its linkage to atmospheres
Geological and astronomical observations on the "lava world" of the rocky planet, with additional theoretical interpretation of Moon’s crustal formation, bring up to the occurrence of the magma ocean
A Hot Mars-sized Exoplanet Transiting an M Dwarf
We validate the planetary nature of an ultra-short-period planet orbiting the M dwarf KOI-4777. We use a combination of space-based photometry from Kepler, high-precision, near-infrared Doppler
A Multispecies Pseudoadiabat for Simulating Condensable-rich Exoplanet Atmospheres
Central stages in the evolution of rocky, potentially habitable planets may play out under atmospheric conditions with a large inventory of nondilute condensable components. Variations in condensate
A compositional link between rocky exoplanets and their host stars
TLDR
The iron fractions of rocky exoplanets and their host stars correlate with each other, but the slope is steeper than 1, indicating that planet formation processes modify the compositions of rocky planets.
...
1
2
3
...

References

SHOWING 1-10 OF 172 REFERENCES
Identifying Atmospheres on Rocky Exoplanets through Inferred High Albedo
The upcoming launch of the James Webb Space Telescope (JWST) means that we will soon have the capability to characterize the atmospheres of rocky exoplanets. However, it is still unknown whether such
Ranges of Atmospheric Mass and Composition of Super-Earth Exoplanets
Terrestrial-likeexoplanets may obtainatmospheres from three primary sources:capture of nebulargases,degassing during accretion, and degassing from subsequent tectonic activity. Here we model
Variability in the super-Earth 55 Cnc e
Considerable progress has been made in recent years in observations of atmospheric signatures of giant exoplanets, but processes in rocky exoplanets remain largely unknown due to major challenges in
Absence of a thick atmosphere on the terrestrial exoplanet LHS 3844b
TLDR
Results support theoretical predictions that hot terrestrial planets orbiting small stars may not retain substantial atmospheres, and are well fitted by a bare-rock model with a low Bond albedo.
Habitability of Exoplanet Waterworlds
We model the evolution of ocean temperature and chemistry for rocky exoplanets with 10-1000$\times$ Earth's H$_2$O but without H$_2$, taking into account C partitioning, high-pressure ice phases, and
Enhanced atmospheric loss on protoplanets at the giant impact phase in the presence of oceans
TLDR
It is suggested that remnants of the noble-gas rich proto-atmosphere survived on Venus, but not on Earth, because most of the neon must have escaped from both planets’ atmospheres later to yield the observed ratio of neon to argon.
Atmospheric escape from the TRAPPIST-1 planets and implications for habitability
TLDR
The atmospheric escape rates numerically and analytically for the planets of the TRAPPIST-1 system are determined and it is shown that the outer planets are potentially likely to retain their atmospheres over billion-year timescales.
Rocky super-Earths or waterworlds: the interplay of planet migration, pebble accretion, and disc evolution
Recent observations have found a valley in the size distribution of close-in super-Earths that is interpreted as a signpost that close-in super-Earths are mostly rocky in composition. However, new
Linking the evolution of terrestrial interiors and an early outgassed atmosphere to astrophysical observations
Context. A terrestrial planet is molten during formation and may remain molten due to intense insolation or tidal forces. Observations favour the detection and characterisation of hot planets,
History of water loss and atmospheric O2 buildup on rocky exoplanets near M dwarfs
...
1
2
3
4
5
...