Results 31 to 40 of about 6,063 (251)

Advances in Mass Spectrometers for Flyby Space Missions for the Analysis of Biosignatures and Other Complex Molecules

Universe, 2022
Spacecraft flybys provide access to the chemical composition of the gaseous envelope of the planetary object. Typical relative encounter velocities range from km/s to tens of km/s in flybys.
Rico G. Fausch, Janis A. Schertenleib, Peter Wurz   +2 more
doaj   +1 more source

Neutral Atom Imaging of the Solar Wind-Magnetosphere-Exosphere Interaction Near the Subsolar Magnetopause. [PDF]

Geophys Res Lett, 2020
Energetic neutral atoms (ENAs) created by charge‐exchange of ions with the Earth's hydrogen exosphere near the subsolar magnetopause yield information on the distribution of plasma in the outer magnetosphere and magnetosheath.
Fuselier SA, Dayeh MA, Galli A, Funsten HO, Schwadron NA, Petrinec SM, Trattner KJ, McComas DJ, Burch JL, Toledo-Redondo S, Szalay JR, Strangeway RJ.   +11 more
europepmc   +2 more sources

The Contribution of Electrons to the Sputter-produced O2 Exosphere on Europa

, 2021
Electrons contribute a strong radiation component to the surface bombardment of Europa. However, they are not typically considered to contribute to erosion of the surface H2O-ice or produce exospheres of radiolytic O2, as laboratory studies on sputtering
M. R. Davis, R. Meier, J. Cooper, Mark J. Loeffler   +3 more
semanticscholar   +1 more source

Density in a Simple Model of the Exosphere [PDF]

The Physics of Fluids, 1962
The particle density of a simple model of the exosphere is obtained by solving exactly the collisionless Boltzmann equation. The main point of the solution is that it is a discontinuous, multivalued function of the constants of motion. Results, of course, agree with those of other methods based on Newtonian mechanics.
Aamodt, Richard Edward, Case, K. M.
openaire   +3 more sources

Kinetic modeling of sodium in the lunar exosphere [PDF]

, 2013
Our knowledge about the lunar environment is based on a large volume of ground-based, remote, and in situ observations. These observations have been conducted at different times and sampled different pieces of such a complex system as the surface-bound ...
Combi, Michael R., Tenishev, Valeriy, Sarantos, Menelaos, Tucker, Orenthal J., Rubin, Martin   +4 more
core   +1 more source

3D-modeling of Mercury's solar wind sputtered surface-exosphere environment [PDF]

, 2015
The efficiency of sputtered refractory elements by H+ and He++ solar wind ions from Mercury's surface and their contribution to the exosphere are studied for various solar wind conditions.
Lichtenegger, H.I.M., Wurz, Peter, Martín-Fernández, J.A., Lammer, H., Wurz, P., McKenna-Lawlor, S., Alho, M., Martin-Fernandez, J. A., MURA, Alessandro, Kallio, E., Pfleger, M., Lichtenegger, H. I. M., Mura, A.   +12 more
core   +1 more source

Comparative deep Earth volatile cycles: The case for C recycling from exosphere/mantle fractionation of major (H2O, C, N) volatiles and from H2O/Ce, CO2/Ba, and CO2/Nb exosphere ratios

Earth and Planetary Science Letters, 2018
Crucial monitors of operation of deep Earth volatile cycles are the accumulated volatile masses in the exosphere, particularly when these are compared to outgassing fluxes and to the masses stored in the mantle. Further insight can be gained by examining
M. Hirschmann
semanticscholar   +1 more source

The Rosetta campaign to detect an exosphere at Lutetia [PDF]

, 2012
On 10th July 2010 the Rosetta spacecraft passed within 3160 km of asteroid 21 Lutetia during which seven instruments attempted to detect an exosphere. A comparison of the sensitivity is made between the different instruments based on a simple spherical ...
Retherford, K.D., Auster, H.U., Wright, I., Richter, I., Galand, M., A'Hearn, M.F., Lee, S., Morse, A. D., Gulkis, S., Carr, C.M., Andrews, D., Stern, S., AHearn, M., Parker, J., Wright, I.P., Stern, S. A., A'Hearn, M. F., Morse, A., Weaver, H. A., Morse, A.D., Stern, S.A., Carr, C. M., Auster, H., Retherford, K., Andrews, D. J., Auster, H. U., Weaver, H., Feldman, P., Carr, C., Retherford, K. D., Weaver, H.A., Wright, I. P., Andrews, D.J., Goesmann, F., Altwegg, K., Sheridan, S.   +35 more
core   +1 more source

Two-dimensional model for the martian exosphere: Applications to hydrogen and deuterium Lyman α observations

Icarus (New York, N.Y. 1962), 2020
The analysis of Lyman α observations in the exosphere of Mars has become limited by the assumption of spherical symmetry in the modeling process, as the models are being used to analyze increasingly detailed measurements.
D. Bhattacharyya, J. Chaufray, M. Mayyasi, J. Clarke, S. Stone, R. Yelle, W. Pryor, J. Bertaux, J. Deighan, S. Jain, N. Schneider   +10 more
semanticscholar   +1 more source

Monte-Carlo simulation of Callisto's exosphere [PDF]

, 2015
We model Callisto's exosphere based on its ice as well as non-ice surface via the use of a Monte-Carlo exosphere model. For the ice component we implement two putative compositions that have been computed from two possible extreme formation scenarios of ...
Barabash, S., Mousis, O., Wurz, Peter, Vorburger, Audrey Helena, Lammer, H., Wurz, P., Vorburger, A.   +6 more
core   +1 more source