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The “dancing ghosts” are among the new discoveries in the cosmos



The “dancing ghosts” are among the new discoveries in the cosmos


Researchers from Western Sydney University and Csiro, Australia’s national science agency, found strange clouds of electrons around galaxies within the cosmos. The clouds, which are about 1 billion light years away and have never been seen before, they look like two dancing ghosts.

The “dancing ghosts” were discovered as part of the first deep-sky search using Csiro’s Australian Square Kilometer Array Pathfinder (Askap) radio telescope located in Western Australia. The discovery, reported in an article to be published in Publications of the Astronomical Society of Australia as well as describing the first EMU (Evolutionary Map of the Universe) pilot research project, is one of several objects and phenomena discovered in the study.

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A habit of surprises

“We are getting used to surprises as we scan the skies as part of the EMU Project and will probe the universe deeper than any previous telescope. When you boldly go where no telescope has gone before, you are likely to make new discoveries, ”explained researcher and professor Ray Norris of Western Sydney University and Csiro. “When we first saw ‘dancing ghosts’, we had no idea what they were. After weeks of work, we discovered that we were seeing two “host” galaxies, about 1 billion light-years away. At their core there are two supermassive black holeswhich emit jets of electrons bent into grotesque shapes by an intergalactic wind.

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“New discoveries, however, always raise new questions, and this one is no different. We still don’t know where the wind comes from. Why are you so tangled up? And what’s causing the radio broadcast streams? It will probably take a lot more observations and models before we understand these things, ”Norris added.

Giant rings

Other objects and phenomena discovered so far appear to be giant rings of radio emission nearly 1 million light years in diameter, which surround distant galaxies. “We’re also finding surprises in places we thought we understood. Next to the well-studied galaxy IC5063, we find a gigantic radio galaxy , one of the largest known, whose existence has never been suspected. His black hole supermassive is generating jets of electrons nearly 5 million light years long. Askap is the only telescope in the world capable of seeing the full range of this faint emission, ”Norris noted.

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The Askap telescope is operated by Csiro and is part of the Australia Telescope National Facility. It uses new technology to achieve extremely high search speeds. This makes it one of the best tools in the world for mapping the sky into radio wavelengths.