Cosmic particle accelerator reaches theoretical limit sciencemagazine
The research group observed that the particles were accelerated to energies several hundreds of times higher than previously observed in novae. Additionally, the energy released as a result of the explosion was transformed extremely efficiently into accelerated protons and heavy nuclei, such that the particle acceleration reached the maximum speeds calculated in theoretical models.
Artist’s impression of the RS Ophiuchi binary star system, which is comprised of a white dwarf and red giant that orbit each other. Material from the red giant is continually accreted by the companion star. Credit: DESY/H.E.S.S., Science Communication Lab During the eruption of RS Ophiuchi, the researchers were able for the first time to follow the development of the nova in real time, allowing them to observe and study cosmic particle acceleration as if they were watching a film. The researchers were able to measure high-energy gamma rays up to one month after the explosion.
Specific telescopes were required for these measurements. The H.E.S.S. facility in Namibia consists of five Cherenkov telescopes that are used to investigate gamma rays from space. A new, highly sensitive state-of-the-art camera—known as FlashCam—was recently installed in the largest
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