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Artist’s impression of the Vela pulsar, within the centre, and its magnetosphere, whose edge is marked by the intense circle. The blue tracks travelling outwards symbolize the paths of accelerated particles. These produce gamma radiation alongside the arms of a rotating spiral by colliding with infrared photons emitted within the magnetosphere (in pink). © Science Communication Lab for DESY
Pulsars, small, very dense lifeless stars, emit electromagnetic radiation within the type of beams that sweep by means of area at common intervals, relatively like cosmic lighthouses. Now, current observations of one of many nearest pulsars to Earth, the Vela pulsar, have brought on a serious stir within the scientific neighborhood: radiation round 200 occasions extra energetic than any beforehand detected from this supply has been detected on the H.E.S.S.1 observatory by scientists from the CNRS2 and CEA, working as a part of a world group. This exceptional discovery is tough to reconcile with the generally accepted idea that particles produced close to the floor of pulsars are accelerated alongside their magnetic subject strains out to the sides of their magnetosphere. These findings, to be revealed within the journal Nature Astronomy, shake up our present theories about the way in which pulsars behave, and pave the way in which for a greater understanding of the acute acceleration processes at work in extremely magnetic astrophysical objects.
Notes
1- The Excessive Vitality Stereoscopic System (H.E.S.S.), to which the CNRS and the CEA contribute, is an array of 5 telescopes positioned in Namibia used to review cosmic gamma rays.
2- The primary French laboratories concerned are as follows: Laboratoire Astroparticule et cosmologie (CNRS/Université Paris Cité), Laboratoire Leprince Ringuet (CNRS/École polytechnique), Laboratoire univers et théories (CNRS/Observatoire de Paris – PSL), Laboratoire physique nucléaire et hautes énergies (CNRS/Sorbonne Université), Laboratoire d’Annecy de physique des particules (CNRS/Université de Savoie Mont Blanc), Centre de physique des particules de Marseille (CNRS/Aix-Marseille Université), Laboratoire Univers et particules de Montpellier (CNRS/Université de Montpellier), Laboratoire de physique des 2 infinis – Bordeaux (CNRS/Université de Bordeaux), Laboratoire d’astrophysique de Bordeaux (CNRS/Université de Bordeaux), Institut de recherche sur les lois fondamentales de l’Univers (CEA).
Bibliography
Discovery of a Radiation Part from the Vela Pulsar Reaching 20 Teraelectronvolts.
The H.E.S.S. collaboration. Nature Astronomy, 5 october 2023.
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