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https://hdl.handle.net/2440/124253
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dc.contributor.author | Abdalla, H. | - |
dc.contributor.author | Aharonian, F. | - |
dc.contributor.author | Ait Benkhali, F. | - |
dc.contributor.author | Angüner, E.O. | - |
dc.contributor.author | Arakawa, M. | - |
dc.contributor.author | Arcaro, C. | - |
dc.contributor.author | Armand, C. | - |
dc.contributor.author | Backes, M. | - |
dc.contributor.author | Barnard, M. | - |
dc.contributor.author | Becherini, Y. | - |
dc.contributor.author | Becker Tjus, J. | - |
dc.contributor.author | Berge, D. | - |
dc.contributor.author | Bernlöhr, K. | - |
dc.contributor.author | Blackwell, R. | - |
dc.contributor.author | Böttcher, M. | - |
dc.contributor.author | Boisson, C. | - |
dc.contributor.author | Bolmont, J. | - |
dc.contributor.author | Bonnefoy, S. | - |
dc.contributor.author | Bordas, P. | - |
dc.contributor.author | Bregeon, J. | - |
dc.contributor.author | et al. | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Nature Astronomy, 2019; 4(2):167-173 | - |
dc.identifier.issn | 2397-3366 | - |
dc.identifier.issn | 2397-3366 | - |
dc.identifier.uri | http://hdl.handle.net/2440/124253 | - |
dc.description.abstract | The Crab nebula is one of the most-studied cosmic particle accelerators, shining brightly across the entire electromagnetic spectrum up to very-high-energy gamma rays 1,2. It is known from observations in the radio to gamma-ray part of the spectrum that the nebula is powered by a pulsar, which converts most of its rotational energy losses into a highly relativistic outflow. This outflow powers a pulsar wind nebula, a region of up to ten light-years across, filled with relativistic electrons and positrons. These particles emit synchrotron photons in the ambient magnetic field and produce very-high-energy gamma rays by Compton up-scattering of ambient low-energy photons. Although the synchrotron morphology of the nebula is well established, it has not been known from which region the very-high-energy gamma rays are emitted 3,4,5,6,7,8. Here we report that the Crab nebula has an angular extension at gamma-ray energies of 52 arcseconds (assuming a Gaussian source width), much larger than at X-ray energies. This result closes a gap in the multi-wavelength coverage of the nebula, revealing the emission region of the highest-energy gamma rays. These gamma rays enable us to probe a previously inaccessible electron and positron energy range. We find that simulations of the electromagnetic emission reproduce our measurement, providing a non-trivial test of our understanding of particle acceleration in the Crab nebula. | - |
dc.description.statementofresponsibility | H. Abdalla, F. Aharonian, Benkhali F. Ait, E. O. Angüner ... Gavin Rowell ... Fabien Voisin ... et al. | - |
dc.language.iso | en | - |
dc.publisher | Nature Publishing Group | - |
dc.rights | 2019 © The Author(s), under exclusive licence to Springer Nature Limited 2019 | - |
dc.source.uri | http://dx.doi.org/10.1038/s41550-019-0910-0 | - |
dc.subject | Magnetic fields; emission measurements; energy; space telescopes; emissions; wind; gamma rays | - |
dc.title | Resolving the Crab pulsar wind nebula at teraelectronvolt energies | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1038/s41550-019-0910-0 | - |
pubs.publication-status | Published | - |
Appears in Collections: | Aurora harvest 8 Physics publications |
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