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Journal ArticleDOI

The interaction of matter and radiation in a hot-model universe

Ya. B. Zel'dovich, +1 more
- 01 Jan 1969 - 
- Vol. 4, Iss: 3, pp 301-316
TLDR
In this article, it was shown that any injection of energy att>1010 sec (red shiftz <105) leads to deviation from an equilibrium spectrum, and that a period of neutral hydrogen in the evolution of the universe is unavoidable.
Abstract
In this paper we continue the investigation initiated by Weymann as to the reason why the spectrum of the residual radiation deviates from a Planck curve. We shall consider the distortions of the spectrum resulting from radiation during the recombination of a primeval plasma. Analytical expressions are obtained for the deviation from an equilibrium spectrum due to Compton scattering by hot electrons. On the basis of the observational data it is concluded that a period of neutral hydrogen in the evolution of the universe is unavoidable. It is shown that any injection of energy att>1010 sec (red shiftz<105) leads to deviation from an equilibrium spectrum.

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Citations
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Planck 2015 results - XIII. Cosmological parameters

Peter A. R. Ade, +337 more
TL;DR: In this article, the authors present a cosmological analysis based on full-mission Planck observations of temperature and polarization anisotropies of the cosmic microwave background (CMB) radiation.
Journal ArticleDOI

Extremely high-intensity laser interactions with fundamental quantum systems

TL;DR: In this article, a review of recent investigations on high-energy processes within the realm of relativistic quantum dynamics, quantum electrodynamics, and nuclear and particle physics, occurring in extremely intense laser fields is presented.
Book

High Energy Astrophysics

TL;DR: In this article, the authors introduce high energy astrophysics in the context of galaxies and the origin of cosmic rays in our galaxy, as well as the acceleration of high energy particles in magnetic fields.
References
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Journal ArticleDOI

Electron Radiative Transitions in a Coulomb Field

TL;DR: In this article, the free-free, bound-free and bound-bound Gaunt factors and oscillator strengths were computed for electrons in a pure Coulomb potential for a wide range of electron and photon energies.
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