The experts of the Western Sydney University he was born in CSIRO, Australia’s national science agency, have unveiled strange electron clouds that surround the galaxies that inhabit the most hidden corners of the cosmos. The clouds, which are about a billion light years apart and have never been seen before, look like two ghosts dancing (dancing gost).
The dancing ghosts, or dancing ghosts, were identified during a phase of the first research that involved the night sky, thanks to the use of CSIRO’s Australian Square Kilometer Array Pathfinder (ASKAP) radio telescope.
The study was published in the journal Publications of the Astronomical Society of Australia (PASA).
Dancing Ghost: what is their function in the cosmos?
“We are getting used to seeing new surprises as we scan the skies as part of the EMU project and we explore the Universe deeper than any previous telescope. nand the moment you go where no telescope from is never pushed before, it is likely that you are faced with new ones phenomena“, said Professor Norris.
“When we first saw ‘dancing Ghost’ we had no idea what they were. After weeks of work, we realized we were observing two “guest” galaxies, about a billion light-years away. At their center are two supermassive black holes, which emit jets of electrons which are then folded into grotesque shapes by an intergalactic wind“, explained the scientist.
“New discoveries, however, always raise new questions and the same happens in this case. We still don’t know where this intergalactic wind comes from? Why is it so wrapped up in itself? And what is causing the radio emission streams? It will probably take a lot more observations and models before we understand any of these things“, Observed the expert.
Other objects and phenomena discovered so far as part of the EMU project include the discovery of the mysterious Odd Radio Circles (ORC) which appear to be giant radio emission rings nearly a million light years across, surrounding distant galaxies.
“We are even finding new phenomena in places we thought we had already studied. Next to the well-studied galaxy IC5063, we found one giant radio galaxy, one of the largest known, whose existence had never even been suspected. Its supermassive black hole is generating jets of electrons nearly 5 million light years long. ASKAP is the only telescope in the world capable of seeing the full extent of this weak emission “, Professor Norris specified.
The ASKAP telescope is operated by the CSIRO and is part of the Australia Telescope National Facility. To exploit it, a new technology is used that achieves an extremely high detection rate, making it one of the best tools in the world for mapping the sky at radio wavelengths.
EMU is an international team of over 400 researchers led by Professor Andrew Hopkins of Macquarie University. The EMU pilot survey is led by former EMU project leader, Professor Ray Norris of Western Sydney University.