Mysterious objects coming from a distant galaxy “defy theory”, say scientists

Radio signals.

The galaxy cluster named Abell 3266 is one of the largest concentrations of matter in the nearby universe. It is particularly dynamic, chaotic, and characterized by one peculiarity – perhaps a new kind of physics is happening in it.

The entire universe consists of huge structures of several hundreds to thousands of galaxies, which experts call a cluster or a nest. But the gravitationally bound system of stars, their remnants and cosmic dust represents only a few percent of its total mass. About 80% is dark matter and the rest is ionized gas with a temperature of up to 10 million degrees Celsius, interwoven with weak magnetic fields.

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Clusters of galaxies allow scientists to probe a wide range of rich processes, including magnetism and plasma physics, in an environment they cannot create artificially in laboratories. An international team of astronomers led by Dr. Tessou Vernstrom of The University of Western Australia, has now focused on one of the largest clusters, Abell 3266, with the aim of identifying a number of rarely observed radio objects.

Abell 3266

“When the clumps collide, a huge amount of energy is injected into the hot plasma particles. It generates a radio emission that appears in different shapes and sizes,” explains Tessa Vernstrom.

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During their work, the scientists searched for arc-shaped “radio relics” driven by shock waves passing through the plasma. “Radio halos”, which are irregular sources lying towards the center of the cluster, and for “fossil” sources, the remnants of radio radiation after the death of a supermassive black hole at the center of the galaxy.

To piece together a complete picture of the structure of Abell 3266, they used new data from the ASKAP radio telescope and the Australia Telescope Compact Array (ATCA). “Areas of active energy input are marked in yellow, hot plasma in blue, and regions of low energy in red,” Vernstrom’s image describes. roads.”

New physics

According to scientists, the shock wave is inverted and, moreover, brighter than ordinary radio relics. “That’s why we don’t understand how it came about. We cannot apply any current physical models to it. However, we assume that the emission originally came from the galaxy in the lower left, with a central black hole that has long since burned out,” says the expert.

Astronomers admit that there may be some kind of new physics going on in the dynamic galaxy cluster Abell 3266 that they don’t yet understand. Therefore, over the next five years, telescopes located in the interior of Western Australia will scan the entire southern sky.

Source:

www.thesun.co.uk, www.theconversation.com, www.techbox.sk

The article is in Czech

Tags: Mysterious objects coming distant galaxy defy theory scientists

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