Results 11 to 20 of about 7,158 (191)

Molecular Dynamics Simulation of Solar Wind Implantation in the Permanently Shadowed Regions on the Lunar Surface

Geophysical Research Letters, 2022
Reactive molecular dynamics simulations are carried out to investigate solar wind implantation on lunar surface. This study resolves both the chemical reactions and physical interactions of implantation, analyzes the effects from hydroxyl saturation ...
Ziyu Huang, Ken‐ichi Nomura, Liam S. Morrissey, Joseph Wang   +3 more
doaj   +2 more sources

Influence of Magnetic Fields on Precipitating Solar Wind Hydrogen at Mars. [PDF]

Geophys Res Lett, 2022
Abstract Solar wind protons can interact directly with the hydrogen corona of Mars through charge exchange, resulting in energetic neutral atoms (ENAs) able to penetrate deep into the upper atmosphere of Mars. ENAs can undergo multiple charge changing interactions, leading to an observable beam of penetrating protons in the upper atmosphere. We seek to
Henderson S, Halekas J, Girazian Z, Espley J, Elrod M.   +4 more
europepmc   +2 more sources

A Statistical Investigation of Factors Influencing the Magnetotail Twist at Mars. [PDF]

Geophys Res Lett, 2022
Abstract The Martian magnetotail exhibits a highly twisted configuration, shifting in response to changes in polarity of the interplanetary magnetic field's (IMF) dawn‐dusk (BY) component. Here, we analyze ∼6000 MAVEN orbits to quantify the degree of magnetotail twisting (θTwist) and assess variations as a function of (a) strong planetary crustal field
DiBraccio GA, Romanelli N, Bowers CF, Gruesbeck JR, Halekas JS, Ruhunusiri S, Weber T, Espley JR, Xu S, Luhmann JG, Harada Y, Dubinin E, Poh GK, Brain DA, Curry SM.   +14 more
europepmc   +2 more sources

Environmental Changes Recorded in Sedimentary Rocks in the Clay-Sulfate Transition Region in Gale Crater, Mars: Results From the Sample Analysis at Mars-Evolved Gas Analysis Instrument Onboard the Mars Science Laboratory Curiosity Rover. [PDF]

J Geophys Res Planets
Abstract The Curiosity rover explored the region between the orbitally defined phyllosilicate‐bearing Glen Torridon trough and the overlying layered sulfate‐bearing unit, called the “clay‐sulfate transition region.” Samples were drilled from the top of the fluviolacustrine Glasgow member of the Carolyn Shoemaker formation (CSf) to the eolian Contigo ...
Clark JV, Sutter B, McAdam AC, Lewis JMT, Franz H, Archer PD, Chou L, Eigenbrode J, Knudson C, Stern J, Glavin D, Steele A, House CH, Schroeder J, Berger J, Rampe EB, Simpson S, Tutolo B, Milliken RE, Malespin C, Mahaffy P, Vasavada A.   +21 more
europepmc   +2 more sources

Surprising Decrease in the Martian He Bulge During PEDE‐2018 and Changes in Upper Atmospheric Circulation

Journal of Geophysical Research: Planets, Volume 128, Issue 8, August 2023., 2023
Abstract Using the Neutral Gas and Ion Mass Spectrometer (NGIMS) on the Mars Atmosphere Volatile and Evolution spacecraft (MAVEN), we analyzed data from Mars Year (MY) 32, 34, and 35 to examine the He bulge during the northern winter solstice (Ls ∼ 180–240), specifically focusing on the effects from the planet encircling dust event (PEDE‐2018).
Meredith K. Elrod, Stephen Bougher, Kali Roeten, Kenneth Arnold   +3 more
wiley   +1 more source

Interactions in Massive Colliding Wind Binaries [PDF]

Journal of Astronomy and Space Sciences, 2012
There are observational difficulties determining dynamical masses of binary star components in the upper HR diagram both due to the scarcity of massive binary systems and spectral and photometric contamination produced by the strong wind outflows in ...
Michael F. Corcoran
doaj   +1 more source

Directional Observation of Cold Dark Matter Particles (WIMP) in Light Target Experiments

Universe, 2021
For the last 10 years, the search for dark matter (DM) was carried out taking into account the fact that the DM particles are WIMPs (Weakly Interacted Massive Particles) which were introduced in supersymmetric extensions of the Standard Model.
Anna Anokhina, Vasilisa Gulyaeva, Emil Khalikov, Evgeny Kurochkin, Tatiana Roganova, Eduard Ursov, Ivan Vidulin   +6 more
doaj   +1 more source

Dynamical Heating in the Martian Thermosphere

Journal of Geophysical Research: Planets, Volume 128, Issue 6, June 2023., 2023
Abstract Dynamical heating and cooling are prominent features of planetary atmospheres resulting in thermospheric structures on Venus, Earth and Mars. The purpose of this study is to determine the location and amplitude of localized heating regions in the Martian thermosphere, confirm that they occur in regions of wind convergence and compare the ...
M. D. Pilinski, K. J. Roeten, S. W. Bougher, M. Benna   +3 more
wiley   +1 more source

Recasting direct detection limits within micrOMEGAs and implication for non-standard dark matter scenarios

European Physical Journal C: Particles and Fields, 2021
Direct detection experiments obtain 90% upper limits on the elastic scattering cross sections of dark matter with nucleons assuming point-like interactions and standard astrophysical and cosmological parameters.
G. Bélanger, A. Mjallal, A. Pukhov
doaj   +1 more source

Using the potassium‐argon laser experiment (KArLE) to date ancient, low‐K chondritic meteorites

Meteoritics &Planetary Science, Volume 58, Issue 4, Page 591-611, April 2023., 2023
Abstract Several laboratories have been investigating the feasibility of in situ K‐Ar dating for use in future landing planetary missions. One drawback of these laboratory demonstrations is the insufficient analogy of the analyzed analog samples with expected future targets. We present the results obtained using the K‐Ar laser experiment (KArLE) on two
Fanny Cattani, Barbara A. Cohen, Cameron M. Mercer, Agnes J. Dahl   +3 more
wiley   +1 more source