Results 141 to 150 of about 298,499 (308)
HI and Cosmology: What We Need To Know [PDF]
, 2008 There are three distinct regimes in which radio observations of the redshifted 21 cm line of HI can contribute directly to cosmology in unique ways. The regimes are naturally divided by redshift, from high to low, into: inflationary physics, the Dark ...
Bowman, Judd D.
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, 2005 76 pages, 36 figures, invited Lectures, to appear in the Proceedings of the CERN-JINR European School of High Energy Physics, San Feliu (Spain), 30 May - 12 June ...
openaire +2 more sources
Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.Abstract A polar cap patch was observed to exit the polar cap to become a blob as it entered the auroral oval on the nightside of the Earth under moderately quiet geomagnetic conditions (Kp = 3−). Auroral particle precipitation led to an increase in the electron density of the blob.
S. J. Maguire +9 more
wiley +1 more source
Diffusion-HMC: Parameter Inference with Diffusion-model-driven Hamiltonian Monte Carlo
The Astrophysical JournalDiffusion generative models have excelled at diverse image generation and reconstruction tasks across fields. A less explored avenue is their application to discriminative tasks involving regression or classification problems.
Nayantara Mudur +2 more
doaj +1 more source
, 2000 Invited Lectures at 1999 European School of High Energy Physics, Casta-Papiernicka, Slovak Republic, 22 August - 4 September 1999 78 pages, 42 figures, uses cernrep ...
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Phase‐Space Synchronization Driven by Moon‐Magnetosphere Coupling in Gas Giants
Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.Abstract We present a new theoretical framework to describe the rapid and spatially localized loss of energetic particles in planetary radiation belts, focusing on interactions between gas giant magnetospheres and their moons. Observations show that flux depletions—known as microsignatures—often refill on timescales comparable to a single drift period,
Adnane Osmane +2 more
wiley +1 more source
Periodic Density Structures Observed in Ulysses Data: First Results
Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.Abstract Periodic density structures (PDSs) are advecting quasi‐periodic (periodicities between several minutes and several hours) density enhancements observed in the solar wind and corona. There is strong evidence that PDSs are formed at the Sun.
Brent M. Randol +3 more
wiley +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.Abstract Cherenkov detectors have been used in space for decades to measure Galactic Cosmic Rays (GCRs), Solar Energetic Particles (SEPs) and trapped particles. We present proof‐of‐concept GRAS/Geant4 simulations to both show that a cubic fused silica Cherenkov detector with SiPM in LEO has a good sensitivity to SEP and GCR protons as a function of cut‐
C. S. W. Davis +6 more
wiley +1 more source
Characterizing the Nanohertz Gravitational Wave Background Using a t-process Power Spectral Density
The Astrophysical JournalPulsar timing arrays (PTAs) are sensitive to low-frequency gravitational waves (GWs), which induce correlated changes in millisecond pulsars’ timing residuals.
Shashwat C. Sardesai +2 more
doaj +1 more source
Stellar populations in the ELT perspective
, 2014 We discuss the impact that the next generation of Extremely Large Telescopes will have on the open astrophysical problems of resolved stellar populations.
Bono, G. +13 more
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