Results 101 to 110 of about 15,938 (229)

Pre-impact Thermophysical Properties and the Yarkovsky Effect of NASA DART Target (65803) Didymos

open access: yesThe Planetary Science Journal
The NASA Double Asteroid Redirection Test (DART) spacecraft impacted the secondary body of the binary asteroid (65803) Didymos on 2022 September 26 and altered its orbit about the primary body.
Benjamin Rozitis   +10 more
doaj   +1 more source

Evidence of a metal-rich surface for the asteroid (16) Psyche from interferometric observations in the thermal infrared

open access: yes, 2013
We describe the first determination of thermal properties and size of the M-type asteroid (16) Psyche from interferometric observations obtained with the Mid-Infrared Interferometric Instrument (MIDI) of the Very Large Telescope Interferometer. We used a
Carry, Benoit   +3 more
core   +2 more sources

Mid-infrared Measurements of Ion-irradiated Carbonaceous Meteorites: How to Better Detect Space Weathering Effects

open access: yesThe Planetary Science Journal
Remote sensing study of asteroids will soon enter a new era with an increasing amount of data available thanks to the JWST, especially in the mid-infrared (MIR) range that allows identification of mineral species.
C. Lantz   +10 more
doaj   +1 more source

Combustion and Pyrolysis EA‐IRMS Techniques to Determine the δ2H of Diamonds

open access: yesRapid Communications in Mass Spectrometry, Volume 40, Issue 10, 30 May 2026.
ABSTRACT Rationale Diamonds are generally considered to be metasomatic minerals originating from the Earth's mantle. They formed through the interaction of carbon‐bearing fluids or melts with the surrounding deep lithology. Most knowledge about the formation of diamonds comes from studying their mineral inclusions or stable isotopes.
François Fourel   +4 more
wiley   +1 more source

Modeling Linear Polarization of the Didymos–Dimorphos System before and after the DART Impact

open access: yesThe Planetary Science Journal
We analyze the polarization observations of the Didymos–Dimorphos system before and after the impact by the NASA Double Asteroid Redirection Test spacecraft on Dimorphos.
Antti Penttilä   +6 more
doaj   +1 more source

Measuring the Sizes, Shapes, Surface Features and Rotations of Solar System Objects with Interferometry

open access: yes, 2011
We consider the application of interferometry to measuring the sizes and shapes of small bodies in the solar system that cannot be spatially resolved by today's single-dish telescopes.
Allen, Ronald J.   +3 more
core   +1 more source

circPDE4B downregulation triggers GEMIN5‑dependent translational stress response and autophagy to reduce MAPT pathology

open access: yesAlzheimer's &Dementia, Volume 22, Issue 5, May 2026.
Abstract INTRODUCTION Circular RNAs (circRNAs) are emerging as key regulators of gene expression, synaptic plasticity, and neuronal function in Alzheimer's disease (AD). Here, we characterize the biological actions of circPDE4B, a highly expressed circRNA markedly reduced in AD. METHODS circPDE4B knockdown in neuronal progenitor cells was combined with
Sambhavi Puri   +15 more
wiley   +1 more source

Detection of a 2.85 μm Feature on Five Spinel-rich Asteroids from JWST

open access: yesThe Astrophysical Journal Letters
Ground-based observations of “Barbarian” L-type asteroids at 1–2.5 μ m indicate that their near-infrared spectra are dominated by the mineral spinel, which has been attributed to a high abundance of calcium-aluminum inclusions (CAIs)—the first solids to ...
Jonathan Gomez Barrientos   +4 more
doaj   +1 more source

Dynamics in the vicinity of (101955) Bennu: Solar radiation pressure effects in equatorial orbits

open access: yes, 2017
Here we study the dynamical effects of the solar radiation pressure (SRP) on a spacecraft that will survey the near-Earth rotating asteroid (101955) Bennu when the projected shadow is accounted for. The spacecraft's motion near (101955) Bennu is modelled
Aljbaae, S.   +3 more
core   +1 more source

Field‐free programmable bipolar magnetic heterostructures for neuromorphic computing

open access: yesInfoMat, Volume 8, Issue 5, May 2026.
Neuromorphic computing mimics the brain's efficiency, yet typical memristors lack biological synapses' dual signal control. We introduce a magnetic memristor enabling bidirectional, multi‐state modulation without external fields, validated in image feature extraction and neural clustering.
Yaping He   +9 more
wiley   +1 more source

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