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Thus, apparently, apart from neutrinos, gamma rays are partially produced by high energy protons in supermassive black hole jets like this blazar.
This is a surprising discovery that not only confirms blazar as a source of high energy neutrinos, but also establishes a new field of study: neutrino astrophysics multi-messenger: the use of different types of detectors gathered to study the same phenomenon. This same technique was used in the incredible research that confirmed and photographed collision neutron stars
Neutrinos from outside the galaxy
High energy extragalactic neutrinos were an enigma since their first detection in 2012, identified with the special IceCube neutrino detector at the South Pole, taking advantage of the Antarctic ice. Subatomic particles are rare, but they are not much rarer than neutrinos. Their mass is almost zero, they travel at almost the speed of light and do not really interact with normal matter; for them, the universe would be almost disembodied. Hence the name of "ghost particle".
However, that does not mean that they can not interact with the material, and that's where the IceCube observatory of Antarctica comes in, from time to time, a Neutrino can interact with ice and create a flash of light.
Source: Very Interesting
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