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SUMMARY:ECAP Seminar: Laura Olivera-Nieto\, University of Amsterdam
DESCRIPTION:The jets of X-ray binaries can produce (some of) the most energetic Galactic cosmic rays\nThe origin of cosmic-rays remains one of the biggest mysteries in astrophysics. Cosmic rays can carry away large fractions of the total energy of their sources\, contributing to the energy density of the interstellar medium as much as starlight does. Despite their importance\, there are big gaps in our understanding of where and how cosmic rays are accelerated\, especially as their energy increases. Extreme particle acceleration requires rather exotic astrophysical environments\, such as the powerful outflows associated with accretion onto black holes (“jets”). In fact\, the jets produced by supermassive black holes in the center of distant galaxies are often invoked to explain the most energetic cosmic rays detected. But what about our own Galaxy? In my talk I will introduce an emerging class of particle accelerators: jets produced by stellar-mass black holes (“X-ray binaries” ) in our own Galactic backyard. Although their relevance was long theorized\, it is only recently that the detection of the gamma-ray emission produced by the accelerated particles has began to reveal their potential as particle accelerators. I will describe the current observational evidence that some X-ray binary jets can accelerate particles to energies up to and above 1 PeV and briefly discuss what to expect from the class as a whole and from observations with future and current facilities
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2026-10-01-laura-olivera-nieto/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
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