قالب وردپرس درنا توس
Home / Science / New Understanding of the Evolution of Cosmic Electromagnetic Fields

New Understanding of the Evolution of Cosmic Electromagnetic Fields



  Electromagnetism
Credit: CC0 Public Domain

Next year, the discovery of electromagnetism by the Danish physicist H.C. Ørsted. Even 200 years after its discovery, the existence of electromagnetism still raises new puzzles regarding its origin.

Such a puzzle is the origin of electromagnetic fields on the largest scale of the universe.

While researchers have long assumed that magnetic fields of femto-Gaussian strength extend to the largest scales in the universe ̵

1; scales larger than the largest galaxy clusters – it is an unresolved mystery of how such magnetic fields are generated in the early Universe may have been.

A logical possibility is that the magnetic fields were amplified by the required primordial period of inflation also to solve the flatness and horizon problem in the standard big bang model, when the magnetic fields in this period some new non-standard interactions with the inflation Had particles. The inflation particle is responsible for accelerating the time of initial inflation.

The problem, however, is that the magnetic fields generated during inflation are likely to be quickly washed away by the subsequent ordinary expansion of the universe, making successful inflationary magnetogenesis challenging. [19659005] Recently researchers Takeshi Kobayashi from the International Center for Theoretical Physics in Italy and Martin S. Sloth from the University of Southern Denmark (the university in the region where HC Ørsted was born) have shown that evolution is due to Faraday's induction law The investigation of the electromagnetic fields after inflation is different than previously assumed, even if strong original electric fields are present.

The work was published in the journal Physical Review D .

"This opens a new door to our understanding of the evolution of cosmic magnetic fields," says Martin S. Sloth, CP3-Origins Professor, Center for Cosmology and Phenomenology of Particle Physics, University of Southern Denmark.


Astrophysicists compute the original magnetic field in our cosmic neighborhood


Further information:
Takeshi Kobayashi et al., Early Cosmological Evolution of Primordial Electromagnetic Fields, Physical Review D (2019). DOI: 10.1103 / PhysRevD.100.023524

Provided by
University of Southern Denmark




Quote :
New Understanding of the Evolution of Cosmic Electromagnetic Fields (2019, 15 October)
retrieved on 15 October 2019
from https://phys.org/news/2019-10-evolution-cosmic-electromagnetic-fields.html

This document is subject to copyright. Apart from any fair dealings for the purpose of private learning or research, no
Part may be reproduced without written permission. The content is for informational purposes only.


Source link