Results 231 to 240 of about 15,826 (268)

Electron‐Impact Excitation of N2 Is Insufficient to Produce the NO2 Continuum in STEVE

open access: yesJournal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract The most studied hypothesis for the continuum emission of Strong Thermal Emission Velocity Enhancement (STEVE) is the NO2 ${\text{NO}}_{2}$ continuum. The ion‐impact pathway for this emission was recently shown to be too slow by a few orders of magnitude. In this work, we evaluate the electron‐impact pathway.
Brian J. Harding, L. Claire Gasque
wiley   +1 more source

The abundance and radial distribution of faint and ultra-faint dwarfs in galaxy clusters. [PDF]

open access: yesMon Not R Astron Soc
Sadhu P   +5 more
europepmc   +1 more source

Non-geodesic timelike observers and the ultralocal limit. [PDF]

open access: yesEur Phys J C Part Fields
Saadati R, Valsan L, Faraoni V.
europepmc   +1 more source
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The cosmological constant and cosmological change

Physics Today, 1977
Is the Universe of infinite extent, or is it a finite system? Will it expand forever, or will it reach some maximum size before turning and collapsing upon itself like an inverse Big Bang? Just a few years ago, models of the conventional Friedman types were showing consistent, albeit tentative, evidence for an open, ever-expanding Universe. Since then,
openaire   +1 more source

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