Discovery of a jet black hole over a million light years long!

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Des radioastronomes australiens viennent de faire savoir qu'ils ont découvert, avec l’ASKAP, un jet de matière 50 fois plus grand que sa galaxie génitrice. © ESO, M. Kornmesser

Observation in wavelengths other than those of the visible has allowed astronomy and astrophysics to make unprecedented discoveries. We just got new evidence with evidence of jets that exceed a million light years in length and are emitted by an elliptical galaxy close to the Local Group. These supermassive black hole jets are among the oldest known. You may also be interested
[EN VIDÉO] 20 years of Futura with Françoise Combes 2021 is the year of Futura’s 20th anniversary! On this great occasion, we asked our sponsors to express themselves on the subject… Françoise Combes has lent herself remarkably to the exercise and gives us her analysis as an astrophysicist of the past, but also of the next 20 years. Askap (Australian Square Kilometer Array Pathfinder) is a set of radio telescopes, located in Western Australia at the Murchison Radio Astronomy Observatory (MRO). It consists of several dozen identical 12-meter-wide satellite dishes that all work together according to the principle of aperture synthesis. It is an interferometry method that allows artificially combining the observations of several telescopes to obtain the virtual equivalent of a very large instrument, for example that of the Earth or the Earth-Moon system as we have seen with the Event Horizon Telescope. Askap served as a prototype for a much more ambitious project still underway in 2022, the Square Kilometer Array (abbreviated SKA, French for “Network of a square kilometer”) which will be the equivalent of a giant radio telescope of a square kilometer Consisting of several interferometric networks in metric and centimeter wavelengths, it is deployed in two locations in South Africa and Australia Presentation of the SKA and ASKAP. For a fairly accurate French translation, click on the white rectangle at the bottom right. The English subtitles should then appear. Then click on the nut to the right of the rectangle, then on “Subtitles” and finally on “Translate automatically”. Choose “French”. © Department of Industry, Science and ResourcesA jet of material 50 times the size of its parent galaxy A group of Australian radio astronomers from the University of Western Sydney have just reported in an article published by The Conversation that they and their colleagues have discovered using ASKAP among the longest supermassive blacks. rays of holes never revealed by instruments in the noosphere. They are associated with NGC 2663, an elliptical galaxy located in the constellation Compass just about 96 million light-years from the Milky Way. It had been discovered by the American astronomer Lewis Swift in 1886 and then and even for decades after, despite its proximity to the Local Group of galaxies (remember that The Local Group of galaxies or, more simply, the Local Group is the group). of more than 60 galaxies to which the Milky Way belongs, whose diameter is about 10 million light years), none of the means of observation in the visible had allowed these jets to be highlighted with all the necessary scientific details in an open access article on arXiv where we learn that in addition to observations in the radio domain, observations in the X-ray domain with satellites such as Chandra and Spektr-RG have been used as apart from the Evolutionary Map of the Universe (EMU) project. by the team led by Velibor Velović, a PhD student at the University of Western Sydney. NGC2663 is a typical elliptical galaxy with about 10 times more stars than Vo i.e. milky and the jet of matter observed in the radio domain is 50 times larger than it, i.e. at a length of more than a million light years, so if we could see in the visible with the naked eye, given the proximity of this galaxy, it would appear larger than the Moon in the sky. Roger Blandford tells us about supermassive black holes and their jets in this video. For a fairly accurate French translation, click on the white rectangle at the bottom right. The English subtitles should then appear. Then click on the nut to the right of the rectangle, then on “Subtitles” and finally on “Translate automatically”. Choose “French”. © Quanta Magazine Are you interested in what you just read?
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