Credit: Felipe Pedreros
Scientists of the P. N. Lebedev Physical Institute of the Russian Academy of Sciences (LPI RAS), the Moscow Institute of Physics and Technology (MIPT) and the Institute for Nuclear Research of RAS (INR RAS) studied the arrival directions of astrophysical neutrinos with energies more than a trillion electronvolts (TeV) and came to an unexpected conclusion: all of them are born near black holes in the centers of distant active galaxies powerful radio sources. Previously, only neutrinos with the highest energies were assumed to be obtained in sources of this class.
It is believed that there are massive black holes in the centers of active galaxies in our universe. They are the heart of these objects with a luminosity of hundreds of millions of suns. Active galaxies, they are also simply quasars, are clearly visible from the earth with both optical and radio telescopes.