Results 1 to 10 of about 242,669 (295)
Cosmic Chemical Evolution [PDF]
The Astrophysical Journal, 1999 Numerical simulations of standard cosmological scenarios have now reached the degree of sophistication required to provide tentative answers to the fundamental question: Where and when were the heavy elements formed? Averaging globally, these simulations
Dave R. +4 more
core +4 more sources
Evolution of cosmic string networks [PDF]
Physical Review D, 1989 Results on cosmic strings are summarized including: (1) the application of non-equilibrium statistical mechanics to cosmic string evolution; (2) a simple one scale model for the long strings which has a great deal of predictive power; (3) results from ...
Albrecht, Andreas, Turok, Neil
core +7 more sources
HYPERNOVA NUCLEOSYNTHESIS AND IMPLICATIONS FOR COSMIC CHEMICAL EVOLUTION [PDF]
, 2001 We examine the characteristics of nucleosynthesis in 'hypernovae', i.e., supernovae with very large explosion energies ($\gsim 10^{52}$ ergs). Implications for the cosmic chemical evolution and the abundances in M82 are discussed.Comment: To appear in ...
William Hix, Friedrich-Karl Thielemann
exaly +4 more sources
Evolution of cosmic string configurations [PDF]
Physical Review D, 1993 We extend and develop our previous work on the evolution of a network of cosmic strings. The new treatment is based on an analysis of the probability distribution of the end-to-end distance of a randomly chosen segment of left-moving string of given ...
A. Albrecht +39 more
core +5 more sources
Three-dimensional earthward fast flow in the near-Earth plasma sheet in a sheared field: comparisons between simulations and observations [PDF]
Annales Geophysicae, 2009 Three-dimensional configuration of earthward fast flow in the near-Earth plasma sheet is studied using three-dimensional magnetohydrodynamics (MHD) simulations on the basis of the spontaneous fast reconnection model.
K. Kondoh, M. Ugai
doaj +1 more source
The structure and dynamics of a large-scale plasmoid generated by fast reconnection in the geomagnetic tail [PDF]
Annales Geophysicae, 2011 As a sequence of Ugai (2010b), the present paper studies in detail the structure and dynamics of large-scale (principal) plasmoid, generated by the fast reconnection evolution in a sheared current sheet with no initial northward field component. The
M. Ugai
doaj +1 more source
Conditions for substorm onset by the fast reconnection mechanism [PDF]
Annales Geophysicae, 2008 The fast reconnection mechanism, involving slow shocks and Alfvénic fast plasma jets, is most responsible for the explosive conversion of magnetic energy associated with geomagnetic substorms and solar flares.
M. Ugai
doaj +1 more source
Magnetic field structure of large-scale plasmoid generated by the fast reconnection mechanism in a sheared current sheet [PDF]
Annales Geophysicae, 2010 On the basis of the spontaneous fast reconnection model, three-dimensional magnetic field profiles associated with a large-scale plasmoid propagating along the antiparallel magnetic fields are studied in the general sheared current sheet system.
M. Ugai
doaj +1 more source
Virtual satellite observations of plasmoids generated by fast reconnection in the geomagnetic tail [PDF]
Annales Geophysicae, 2011 The present paper studies fundamental features of plasmoid propagation by virtual satellite observations in the simulation box. The plasmoid domain is divided into the plasmoid reconnection region P, where magnetized plasmas with reconnected field ...
M. Ugai
doaj +1 more source
HTS Teologiese Studies/Theological Studies, 2021 Science, technology, commerce and consumerism have set humankind on a trajectory towards a catastrophe of inestimable proportions. To respond appropriately to this danger, theology must replace obsolete contextualisations of its message with currently ...
Klaus B. Nürnberger
doaj +1 more source