منابع مشابه
formation and evolution of regional organizations: the case study of the economic cooperation organization (eco)
abstract because of the many geopolitical, geo economical and geo strategically potentials and communicational capabilities of eco region, members can expand the convergence and the integration in base of this organization that have important impact on members development and expanding peace in international and regional level. based on quality analyzing of library findings and experts interv...
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We study the thermal and chemical evolution during the Kelvin-Helmholtz phase of the birth of a neutron star, employing neutrino opacities that are consistently calculated with the underlying equation of state (EOS). Expressions for the diffusion coefficients appropriate for general relativistic neutrino transport in the equilibrium diffusion approximation are derived. The diffusion coefficient...
متن کاملThe Soliton Stars Evolution
The evolution of a soliton star filled with fermions is studied in the framework of general relativity. Such a system can be described by the surface tension σ, the bag constant B, and the fermion number density ρ0. Usually one of these parameters prevails in the system and thus affects the spacetime inside the soliton. Whether it is described by Friedman or de Sitter metric depends on the prev...
متن کاملPopulations of massive stars in galaxies, implications for the stellar evolution theory
After a brief review of the observational evidences indicating how the populations of Be stars, red/blue supergiants, Wolf-Rayet stars vary as a function of metallicity, we discuss the implications of these observed trend for our understanding of the massive star evolution. We show how the inclusion of the effects of rotation in stellar models improves significantly the correspondence between t...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1956
ISSN: 0033-068X
DOI: 10.1143/ptp.15.89