Results 71 to 80 of about 6,292 (199)
Predicting Nitrogen Isotope Fractionation in Nitrate Deposition on Early Mars
Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.Abstract Noachian and early Hesperian Mars were likely warm and wet, with an atmosphere abundant in molecular nitrogen. The recent discovery of nitrate deposits in the Yellowknife Bay mudstones at Gale Crater confirm the existence of nitrogen oxides (NOX) on Noachian Mars. The processes responsible for the production of these nitrates would fractionate
J. Shawcross +4 more
wiley +1 more source
Jupiter's Auroral Ionosphere: Hybrid Monte Carlo, Auroral Spectrum and Conductivity Modeling
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract We present a new model of auroral precipitation and associated phenomena at Jupiter, called the Jupiter Auroral Ionosphere Code (JAIC). The hybrid model follows the primary electron population using a Monte Carlo code that runs on a GPU, and computes the contribution of the secondaries using a two‐stream approximation.
J. D. Nichols
wiley +1 more source
Towards machine-assisted meta-studies: the Hubble constant [PDF]
, 2020 We present an approach for automatic extraction of measured values from the astrophysical literature, using the Hubble constant for our pilot study. Our rules-based model – a classical technique in natural language processing – has successfully extracted
Stenetorp, P +5 more
core
Mastcam‐Z Spectrophotometric Properties of Materials at the Van Zyl Overlook, Jezero Crater
Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.Abstract During Sols 63–65 of Mars 2020, Mastcam‐Z multispectral (442–1022 nm) images were acquired at Van Zyl Overlook (VZO), spanning phase angles from ∼0° to 150°, to model photometric parameters for seven surface units. These units included rocks, soils, regolith, and rover tracks near the Jezero landing site.
B. Margara +6 more
wiley +1 more source
The Global Hubble Constant [PDF]
Australian Journal of Physics, 1990 A review of large-scale investigations of the determination of H is presented. The infrared period-luminosity relation of Cepheids gives distances accurate to -2% to nearby galaxies. Based on the distances of M31, MH, N300 and N2403, a DM of 31 ·30 ±O· 20 has been derived to the nearby Virgo cluster from the TF relation of spirals at four wavebands ...
openaire +1 more source
Hubble constant by natural selection: Evolution chips in the Hubble tension
Astronomy and Computing, 2023 14 pages + refs, 7 figures, v3: discussion improved, new section added on ABC prior dependence, to appear in ASCOM, our codes in https://github.com/reggiebernardo/notebooks/tree/main/supp_ntbks_arxiv.2212 ...
Reginald Christian Bernardo, Y.-R. Lee
openaire +2 more sources
Thermal Escape of Atomic Hydrogen on Mars: A Comprehensive View With a General Circulation Model
Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.Abstract Mars loses water mainly through the photodissociation of water vapor, followed by the thermal escape of light hydrogen atoms. Observations have revealed large seasonal variations in hydrogen concentration in the upper thermosphere, peaking during southern summers and intensifying during dust storms.
Alexander S. Medvedev, Ngan H. D. Trinh
wiley +1 more source
Batteries &Supercaps, Volume 9, Issue 5, May 2026.Lithium‐ion batteries used in space applications are exposed to extreme conditions, including radiation, vacuum, wide temperature fluctuations, and long storage times, all of which accelerate degradation. This review article summarizes the main degradation mechanisms affecting battery performance in space environments, including capacity fade ...
Xunkai Chen, Kelsey B. Hatzell
wiley +1 more source
Holographic realization of constant roll inflation and dark energy: An unified scenario
Physics Letters B, 2023 In the formalism of generalized holographic dark energy, the infrared cut-off LIR is generalized to the form, LIR=LIR(Lp,L˙p,L¨p,⋯,Lf,L˙f,L¨f,⋯,a,H,H˙,H¨,⋯), where Lp and Lf are the particle horizon and the future horizon, respectively (moreover, a is ...
Shin'ichi Nojiri +2 more
doaj +1 more source
New terrace‐tile inlet technologies reduce sediment and nutrient losses
Soil Science Society of America Journal, Volume 90, Issue 3, May/June 2026.Abstract Surface inlets such as Hickenbottom risers (HBRs) are often used to drain closed depressions and potholes across agricultural landscapes in the US Midwest. Although HBRs provide efficient drainage, they also transport substantial nutrient and sediment losses from fields.
Charchit Bansal +3 more
wiley +1 more source