During measurements with ESA’s XMM Newtonian X-ray Space Telescope, scientists discovered strange data that does not match all previous observations. The supermassive black hole (SMBH) at the center of the Markarian 817 galaxy has been emitting a wind of ultrafast particles for about a year, but remains moderately active. So far this has only been observed on super active SSDs and is extremely rare. In rare cases of extreme activity, the supermassive black hole at the center of a galaxy can generate winds so strong that they literally blow interstellar gas and dust out of the galaxy (particles of material ejected from the accretion disk by electromagnetic fields). Release. This stops star formation and actually determines the appearance and fate of the host galaxy. Observing such phenomena is important for astronomers to elucidate the mechanisms of interaction between black holes and their host galaxies, and ultimately to learn more about the evolution of these objects and the universe. The Markarian 817 galaxy, located 430 million light-years from us, had a black hole mass of 81 million solar rays and clearly stood out from all other events of its kind. Activity at the black hole’s center was to be clearly shown by X-rays emitted by superheated material within the accretion disk. However, Mrk 817’s emission detected by ESA’s XMM-Newton X-ray telescope was more than moderate. Controlled tests using another his X-ray system (NASA’s NuSTAR) confirmed the accuracy of the acquired data. As it turned out, the black hole’s wind blocked the X-rays, very strongly in fact. Analysis of the data revealed that activity was observed over a wide area of ​​the accretion disk, resulting in the formation of at least three separate wind currents of charged particles, each reaching speeds of a few percent of the speed of light. vacuum. This took about a year and made it particularly clear how black holes and galaxies can interact. “It is extremely rare to observe superfast winds, and even rarer to observe winds with enough energy to change the properties of their host galaxy.” The fact that it generated these winds for about a year suggests that the black hole’s active state could change the shape of its parent galaxy to a greater extent than previously thought, the study authors said. reported in an article published in the academic journal Astrophysical Diary Letters.

source:https://iopscience.iop.org/article/10.3847/2041-8213/ad1407