Radiation in equilibrium with plasma and plasma effects on cosmic microwave background

Vadim R. Munirov and Nathaniel J. Fisch
Phys. Rev. E 100, 023202 – Published 12 August 2019

Abstract

The spectrum of the radiation of a body in equilibrium is given by Planck's law. In plasma, however, waves below the plasma frequency cannot propagate; consequently, the equilibrium radiation inside plasma is necessarily different from the Planck spectrum. We derive, using three different approaches, the spectrum for the equilibrium radiation inside plasma. We show that, while plasma effects cannot be realistically detected with technology available in the near future, there are a number of quantifiable ways in which plasma affects cosmic microwave background radiation.

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  • Received 13 March 2019

DOI:https://doi.org/10.1103/PhysRevE.100.023202

©2019 American Physical Society

Physics Subject Headings (PhySH)

Plasma PhysicsGravitation, Cosmology & AstrophysicsStatistical Physics & Thermodynamics

Authors & Affiliations

Vadim R. Munirov* and Nathaniel J. Fisch

  • Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543, USA and Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540, USA

  • *vmunirov@pppl.gov

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Issue

Vol. 100, Iss. 2 — August 2019

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