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Article
Libri ricevuti e recensioni
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Article
Libri ricevuti e recensioni
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Article
Libri ricevuti e recensioni
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Article
Libri ricevuti e recensioni
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Article
SN1987A; n-stars, s-stars and the observational evidences
We discuss a SN model with s-matter in the core, compatible with the set of experimental results obtained on SN 1987A by ν-detectors and gravitational antennas.
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Chapter
Interstellar and Intracluster Tunnels and Acceleration of High-Energy Cosmic Rays
The present evidence about the origin of high-energy cosmic rays is that two ranges exist: one below 1018 eV related with galactic sources, and one up to 1020 eV, corresponding to extragalactic processes (Kiràly ...
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Article
Galactic4He and heavy elements enrichment by stellar nucleosynthesis
The contribution to the galactic abundance of He and heavy elements by stellar nucleosynthesis is calculated as a function of time, kee** account of present knowledge about stellar and galactic evolution. A ...
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Article
Galactic neutrino sources and experimental neutrino astronomy
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Article
Stellar evolution
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Article
Shock waves at high densities. — II
We continue the study of shock waves propagating through plasmas in such critical physical conditions as can be of interest in astrophysical problems. In a preceding paper (see reference in the text) we studie...
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Article
Intense magnetic fields and shock wave propagation
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Article
Shock waves at high temperatures — I
In this note we are concerned with plane one-dimensional shock wave propagations at temperatures and densities where electronpositron pairs are produced and thermonuclear reactions or neutrino emissions play a...
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Article
Neutrino emission in the late stages of massive star evolution
The advanced evolutionary phase of massive stars [M=(102÷104)M ⊙] is studied by using Hoyle-Fowler models in order to define some problems which could have importance in a theory of Supernovae (type II). For such...
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Article
Neutrino production in massive helium-star models
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Article
Energy spectrum of neutrinos produced in e+, e− pair annihilation
A calculation is made of the energy spectrum of neutrinos and antineutrinos produced in stars by electron-positron pair annihilation, on the basis of Feynman and Gell-Mann’s theory of weak interactions, in the...
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Article
The propagation of shock waves in the inside of stars — II
The equation of propagation of a shock wave in its form fitting to applications to a generic medium with spherical symmetry is given and it is applied to a series of models. It is shown that the central zones ...
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Article
Massive homogeneous helium-star models
Homogeneous massive helium-star models are calculated considering the radiation pressure in the whole star. Electron scattering is assumed for the opacity, and for energy generation the 3α reactions. Radii are...
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Article
The propagation of disturbaces and shock waves in the inside of stars - I
The problem of the propagation of disturbances in the inside of stars is discussed in its general aspects and as regards its solubility by means of electronic computers. The problem of the stability of the num...
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Article
Le sorgenti di energia nelle stelle