Results 81 to 90 of about 4,095 (225)
Constraining the Hydration of Clay Minerals and Abundances of Amorphous Phases in Gale Crater, Mars
Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.Abstract Both water and organic matter are required for the development and persistence of life. Phyllosilicates (clay minerals) have high surface areas that easily sorb water and organic matter. The Curiosity rover has investigated several hundred meters of stratigraphy in Gale crater, including where clays were detected from orbit.
Sean Czarnecki +3 more
wiley +1 more source
Catch-me-if-you-can: the overshoot problem and the weak/inflation hierarchy
Journal of High Energy Physics, 2022 We study the overshoot problem in the context of post-inflationary string cosmology (in particular LVS). LVS cosmology features a long kination epoch as the volume modulus rolls down the exponential slope towards the final minimum, with an energy density
Joseph P. Conlon, Filippo Revello
doaj +1 more source
Enhanced Detection of Martian Dust Devils From Rover Images Using Machine Learning
Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.Abstract We present a new end‐to‐end pipeline for the detection of Martian dust devils in rover imagery that substantially expands current capabilities for atmospheric monitoring. Applied to 23,409 images from the Perseverance rover across 200 sols, our system identified 19 dust devils, 18 of which were previously undocumented.
Kacy Hatfield +2 more
wiley +1 more source
Kinetic inflation in stringy and other cosmologies [PDF]
Physical Review D, 1995 An inflationary epoch driven by the kinetic energy density in a dynamical Planck mass is studied. In the conformally related Einstein frame it is easiest to see the demands of successful inflation cannot be satisfied by kinetic inflation alone. Viewed in the original Jordan-Brans-Dicke frame, the obstacle is manifest as a kind of graceful exit problem ...
openaire +3 more sources
High‐Latitude Zonal Jets in the Martian Upper Atmosphere Driven by Non‐Orographic Gravity Waves
Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.Abstract We investigate thermosphere responses to non‐orographic gravity waves (GWs) using wind measurements from the Neutral Gas and Ion Mass Spectrometer onboard the Mars Atmosphere and Volatile EvolutioN mission, alongside simulations from the Mars Planetary Climate Model. We focus on zonal jets in high‐latitude regions of the upper atmosphere.
Jiandong Liu +4 more
wiley +1 more source
AMPERE Observations of the Asymmetry Toward Stronger Birkeland Currents in the Northern Hemisphere
Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.Abstract We quantify the asymmetry between the Birkeland currents (also known as field‐aligned currents) in the Northern and Southern Hemispheres. We use data from the Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE) in 2010–2024 inclusive for both hemispheres, compute the observed asymmetry, and then subtract the modeled
John C. Coxon +11 more
wiley +1 more source
A Possible Solution to the Mystery of the ANITA Anomalous Events
Annalen der Physik, Volume 538, Issue 4, April 2026.In 2006 and 2014, the Antarctic Impulsive Transient Antenna (ANITA), a balloon‐borne radio observatory flying over Antarctica, detected two strange upward‐going radio pulse events that have not yet been explained by our current understanding of physics.
Massimo Villata
wiley +1 more source
, 2012 The very basics of cosmological inflation are discussed. We derive the equations of motion for the inflaton field, introduce the slow-roll parameters, and present the computation of the inflationary perturbations and their connection to the temperature fluctuations of the cosmic microwave background.
openaire +2 more sources
Cosmology: The test of inflation [PDF]
Nature, 2009 As the launch of the Planck spacecraft approaches, Eric Hand investigates what the mission could mean for the predominant theory of the moments after the Big Bang.
openaire +1 more source
Assisted Inflation in Bianchi VI0 Cosmologies [PDF]
General Relativity and Gravitation, 2002 11 ...
Aguirregabiria, J. M. +2 more
openaire +3 more sources