Cosmic magnetic fields with astonishing order

Cosmic magnetic fields with astonishing order
Credit: ESO/IDA/Danish 1.5 m/R. Gendler and J.-E. Ovaldsen

Turbulent processes in galaxies generate vast magnetic fields that often present a regular structure on a large scale. These are the findings of a study conducted by astronomers at Ruhr-Universität Bochum under the auspices of Prof Dr. Ralf-Jürgen Dettmar, which have been gathered following the analysis of data compiled with state-of-the-art radio telescopes. The Ruhr-Universität's science magazine Rubin published a report on the research project.

"Galaxies such as our Milky Way are relatively flat objects, which we should picture as discs," describes Dettmar. "It had previously been assumed that the magnetic fields are trapped within the disc." However, based on data gathered at the Jansky Very Large Array, a telescope facility in North America, the astronomers have proved that this is not the case. In the same way as the terrestrial surrounds our planet, the stretches from the disc to the intergalactic medium, i.e. into the space between galaxies.

Supernovas generate magnetic fields

Galactic magnetic fields are formed through numerous stellar explosions, the effects of which last for hundreds of millions of years. The energy bursts of all supernovas put together produce a galaxy's magnetic fields. Due to the fact that are chaotic processes, scientists had not expected them to generate a magnetic with an orderly structure on a large scale. But this is exactly what they have now proved to be the case in several – even though the orderly structures did not manifest in every single object. The underlying mechanisms have not yet been fully understood.

It took digitalisation technology to enable analysis. Digitalisation has made it possible to combine the data of several radio antennas and, consequently, to perform measurements at greater sensitivity and in a broader frequency band than in the pre-digital era. The data upon which the current research is based were compiled in 2011 and 2012. Due to the huge data volume, it took several years to analyse them.


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Citation: Cosmic magnetic fields with astonishing order (2018, April 5) retrieved 20 July 2019 from https://phys.org/news/2018-04-cosmic-magnetic-fields-astonishing.html
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Apr 05, 2018
People on here tried to tell me a decade ago that magnetic fields did not occupy such vast distances. Ince then there have been close to a dozen different papers that taken together show just how wrong those individuals ridiculing me for pointing out that in the Perseus Cluster there are galaxies which exhibit extremely strong magnetic fields, such that it shapes their environment, an elliptical galaxy that had the shape and form of toroidal magnetic field. I was laughed at, told that magnetism is a local thing only. This shows Very Different, So, I take this chance to Laugh Back at those detractors sufferring their occassional rectocranial inversions.

Apr 05, 2018
...... in the Perseus Cluster there are galaxies which exhibit extremely strong magnetic fields, such that it shapes their environment,.....


You might want to give a reference for this.

Apr 05, 2018
Galactic magnetic fields are formed through numerous stellar explosions, the effects of which last for hundreds of millions of years.

This is pseudoscientific claptrap, there are no primordial or frozen-in magnetic fields. Only electric currents and changing electric fields create magnetic fields. Galactic magnetic fields are created by the homopolar motor action of the spinning galactic structure.

Apr 07, 2018
The galactic electric universe

Galactic magnetic fields stretching between galaxies, interaction of their field obviously reach neighbouring galaxies; magnetic fields include electrical currants, tenuous plasma, real world electrical magnetic interaction of the galactic electric universe

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