253 citations · 2.9k across the 51 of their papers we have counts for
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The physical and chemical structure of Titan's upper atmosphere: energy balance, photochemistry and Jeans escape
Sudeshna Boro Saikia, Jonathan Tennyson, Shuchen Ji +7
Titan's upper atmospheric layers provide a unique opportunity to study how photochemistry, photoionisation, haze microphysics and escape processes shape its atmospheric chemical st…
Self-consistent 1D modelling of Jupiter's upper atmosphere as an exoplanet analogue
Nils-Martin Robeling, Sudeshna Boro Saikia, Gwenaëlle Van Looveren +5
Jupiter's upper atmosphere provides a real-world laboratory for validating first-principles models of giant gaseous exoplanets and for constraining the key physical processes that…
Habitable Zone and Atmosphere Retention Distance (HaZARD) Stellar-evolution-dependent loss models of secondary atmospheres
Gwenaël Van Looveren, Sudeshna Boro Saikia, Oliver Herbort +4
A major open question in exoplanet research is whether secondary atmospheres are rare around Earth-sized rocky exoplanets. In this work we determine the distance at which an Earth-…
The young Sun's XUV-activity as a constraint for lower CO-limits in the Earth's Archean atmosphere
C. P. Johnstone, H. Lammer, K. G. Kislyakova +2
Despite their importance for determining the evolution of the Earth's atmosphere and surface conditions, the evolutionary histories of the Earth's atmospheric CO abundance duri…
Stellar winds and planetary atmospheres
Colin P. Johnstone
Interactions between the winds of stars and the magnetospheres and atmospheres of planets involve many processes, including the acceleration of particles, heating of upper atmosphe…
Observability of ultraviolet N I lines in the atmosphere of transiting Earth-like planets
Mitchell E. Young, Luca Fossati, Colin Johnstone +5
Nitrogen is a biosignature gas that cannot be maintained in its Earth-like ratio with CO under abiotic conditions. It has also proven to be notoriously hard to detect at optica…
Loss and fractionation of noble gas isotopes and moderately volatile elements from planetary embryos and early Venus, Earth and Mars
H. Lammer, M. Scherf, H. Kurokawa +12
Here we discuss the current state of knowledge on how atmospheric escape processes can fractionate noble gas isotopes and moderately volatile rock-forming elements that populate pr…
Evolution of the Earth's Polar Outflow From Mid-Archean to Present
K. G. Kislyakova, C. P. Johnstone, M. Scherf +5
The development of habitable conditions on Earth is tightly connected to the evolution of its atmosphere which is strongly influenced by atmospheric escape. We investigate the evol…
Hydrodynamic escape of water vapor atmospheres near very active stars
Colin P. Johnstone
When exposed to the high energy X-ray and ultraviolet radiation of a very active star, water vapor in the upper atmospheres of planets can be photodissociated and rapidly lost to s…
Solar XUV and ENA-driven water loss from early Venus' steam atmosphere
H. I. M. Lichtenegger, K. G. Kislyakova, P. Odert +8
The influence of the hydrogen hydrodynamic upper atmosphere escape, driven by the solar soft X-ray and extreme ultraviolet radiation (XUV) flux, on an expected magma ocean outgasse…
The Kepler-11 system: evolution of the stellar high-energy emission and {initial planetary} atmospheric mass fractions
D. Kubyshkina, L. Fossati, A. J. Mustill +8
The atmospheres of close-in planets are strongly influenced by mass loss driven by the high-energy (X-ray and extreme ultraviolet, EUV) irradiation of the host star, particularly d…
Modelling atmospheric escape and MgII near-ultraviolet absorption of the highly irradiated hot Jupiter WASP-12b
N. K. Dwivedi, M. L. Khodachenko, I. F. Shaikhislamov +8
We present two-dimensional multi-fluid numerical modelling of the upper atmosphere of the hot Jupiter WASP-12b. The model includes hydrogen chemistry, and self-consistently describ…
Detecting volcanically produced tori along orbits of exoplanets using UV spectroscopy
Kristina G. Kislyakova, Luca Fossati, Denis Shulyak +17
We suggest to use the Hubble Space Telescople (HST) follow-up observations of the TESS targets for detecting possible plasma tori along the orbits of exoplanets orbiting M dwarfs.…
Close-in sub-Neptunes reveal the past rotation history of their host stars: atmospheric evolution of planets in the HD3167 and K2-32 planetary systems
Daria Kubyshkina, Patricio Cubillos, Luca Fossati +7
Planet atmospheric escape induced by high-energy stellar irradiation is a key phenomenon shaping the structure and evolution of planetary atmospheres. Therefore, the present-day pr…
Impact of Space Weather on Climate and Habitability of Terrestrial Type Exoplanets
V. S. Airapetian, R. Barnes, O. Cohen +43
The current progress in the detection of terrestrial type exoplanets has opened a new avenue in the characterization of exoplanetary atmospheres and in the search for biosignatures…
Extreme hydrodynamic losses of Earth-like atmospheres in the habitable zones of very active stars
C. P. Johnstone, M. L. Khodachenko, T. Lüftinger +3
Aims. In this letter, we calculate for the first time the full transonic hydrodynamic escape of an Earth-like atmosphere. We consider the case of an Earth-mass planet with an atmos…
Reconstructing Extreme Space Weather from Planet Hosting Stars
V. S. Airapetian, V. Adibekyan, M. Ansdell +80
The field of exoplanetary science is making rapid progress both in statistical studies of exoplanet properties as well as in individual characterization. As space missions provide…
Exoplanet host-star properties: the active environment of exoplanets
John P. Pye, David Barrado, Rafael A. Garcia +12
The primary objectives of the ExoplANETS-A project are to: establish new knowledge on exoplanet atmospheres; establish new insight on influence of the host star on the planet atmos…
Overcoming the limitations of the energy-limited approximation for planet atmospheric escape
Daria Kubyshkina, Luca Fossati, Nikolay V. Erkaev +6
Studies of planetary atmospheric composition, variability, and evolution require appropriate theoretical and numerical tools to estimate key atmospheric parameters, among which the…
A grid of upper atmosphere models for 1--40 MEARTH planets: application to CoRoT-7 b and HD219134 b,c
Daria Kubyshkina, Luca Fossati, Nicolay V. Erkaev +5
There is growing observational and theoretical evidence suggesting that atmospheric escape is a key driver of planetary evolution. Commonly, planetary evolution models employ simpl…
Interaction of infalling solid bodies with primordial atmospheres of disk-embedded planets
Florian Ragossnig, Alexander Stökl, Ernst Dorfi +3
Planets that form early enough to be embedded in the circumstellar gas disk accumulate thick atmospheres of nebular gas. Models of these atmospheres need to specify the surface lum…
The Upper Atmospheres of Terrestrial Planets: Carbon Dioxide Cooling and the Earth's Thermospheric Evolution
Colin P. Johnstone, Manuel Güdel, Helmut Lammer +1
Context: The thermal and chemical structures of the upper atmospheres of planets crucially influence losses to space and must be understood to constrain the effects of losses on at…
Effective induction heating around strongly magnetized stars
K. G. Kislyakova, L. Fossati, C. P. Johnstone +4
Planets that are embedded in the changing magnetic fields of their host stars can experience significant induction heating in their interiors caused by the planet's orbital motion.…
Life Beyond the Solar System: Space Weather and Its Impact on Habitable Worlds
V. S. Airapetian, W. C. Danchi, C. F. Dong +33
The search of life in the Universe is a fundamental problem of astrobiology and a major priority for NASA. A key area of major progress since the NASA Astrobiology Strategy 2015 (N…