Results 21 to 30 of about 23,023 (219)
Journal of Geophysical Research: Space Physics, Volume 128, Issue 10, October 2023., 2023 Abstract We analyze the emission of energetic neutral atom (ENA) flux from charge exchange between Jovian magnetospheric ions and the atmospheres of Callisto and Europa. For this purpose, we combine the draped electromagnetic fields from a hybrid plasma model with a particle tracing tool for the energetic ions.
C. Michael Haynes +5 more
wiley +1 more source
Simulating cosmic reionization and the radiation backgrounds from the epoch of reionization [PDF]
AIP Conference Proceedings, 2012 Based on invited review talk by Paul Shapiro at First Stars IV - From Hayashi to the Future, Kyoto, Japan, May 25, 2012; talk slides available at http://tpweb2.phys.konan-u.ac.jp/~FirstStar4/presentation_files/PShapiro ...
Shapiro, Paul R. +12 more
openaire +2 more sources
Polarity Asymmetries in Rocket‐Triggered Lightning
Geophysical Research Letters, Volume 50, Issue 17, 16 September 2023., 2023 Abstract The dissonant development of positive and negative lightning leaders is a central question in atmospheric electricity. It is also the likely root cause of other reported asymmetries between positive and negative lightning flashes, including the ones regarding: stroke multiplicity, recoil activity, leader velocities, and emission of energetic ...
C. L. da Silva +10 more
wiley +1 more source
Reionization in Technicolor [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 24 pages, 17 figures, accepted to ...
Kristian Finlator +4 more
openaire +3 more sources
Annalen der Physik, Volume 535, Issue 7, July 2023., 2023 Implications for the cosmological model are explored of the assumption that the cosmic microwave background is subject to an SU(2) Yang– Mills theory of scale 10−4 eV rather than U(1) quantum thermodynamics. This concerns zeroth‐order (changes at high redshifts) and first‐order cosmological perturbations (changes at high and low redshifts).
Ralf Hofmann +2 more
wiley +1 more source
Cosmological reionization [PDF]
Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 2000 In popular cosmological scenarios, some time beyond a redshift of 10, stars within protogalaxies created the first heavy elements; these systems, together perhaps with an early population of quasars, generated the ultraviolet radiation and mechanical energy that reheated and reionized the cosmos.
openaire +2 more sources
THE CONTRIBUTION OF SUPERNOVAE TO COSMIC REIONIZATION [PDF]
The Astrophysical Journal, 2011 12 pages, 4 figures; ApJ in ...
Johnson, J., Khochfar, S.
openaire +3 more sources
Cosmological reionization [PDF]
AIP Conference Proceedings, 2001 The universe was reionized by redshift z ~ 6 by a small fraction of the baryons in the universe, which released energy following their condensation out of a cold, dark, and neutral IGM into the earliest galaxies. The theory of this reionization is a critical missing link in the theory of galaxy formation.
openaire +2 more sources
A local clue to the reionization of the universe [PDF]
Science, 2014 Identifying the population of galaxies that was responsible for the reionization of the universe is a long-standing quest in astronomy. We present a possible local analog that has an escape fraction of ionizing flux of 21%. Our detection confirms the existence of gaps in the neutral gas enveloping the starburst region.
Borthakur, Sanchayeeta +3 more
openaire +3 more sources
Measuring the History of Cosmic Reionization using the 21-cm PDF from Simulations [PDF]
, 2009 The 21-cm PDF (i.e., distribution of pixel brightness temperatures) is expected to be highly non-Gaussian during reionization and to provide important information on the distribution of density and ionization.
Barkana +32 more
core +5 more sources