Supernova remnants in the new radio astronomy era
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Le résumé fourni par la source
Supernova remnants (SNRs) are what is left after stellar explosions, when the stellar ejecta, the explosion shock and the circumstellar medium interact. Despite being among the first objects studied in radio astronomy, observational difficulties have so far prevented a definitive characterisation, which would help answer open questions related to these sources. It is debated which is the contribution of SNRs to Galactic cosmic rays, or how the interaction with the surrounding environments influences the particle energetics. The SKA precursors are providing valuable and unexpected discoveries on SNRs, thanks to their unique capabilities to probe spatial scales from a few arcseconds to a few degrees with a sensitivity of tens of microjansky. Accurate integrated flux density measurements and arcsecond-scale spectral-index maps are now possible for tens of SNRs, substantially expanding the small subset of remnants traditionally studied in great detail. SKA will markedly enhance current observations by providing: higher sensitivity, enabling the detection of fainter SNRs also in polarisation, revealing diffuse structures and the underlying magnetic field configuration; higher angular resolution, allowing detailed mapping of compact remnants and reducing depolarisation in fine structures, tracing filaments and shocks fronts; wider frequency coverage to probe unexplored spectral windows, where spectral turnovers and breaks or cut-off may occur, establishing a direct connection to X-ray and γ-ray emission that constrains the electron population, and enabling accurate modelling of the non-thermal emission across the electromagnetic spectrum; improved image fidelity for more reliable cross-matching with other wavelengths, leading to a better understanding of the SNR-interstellar medium interplay.
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Le contrôle bibliographique ouvert
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Osservatorio Astrofisico di Catania pays non établi dans la noticeStructure de recherche
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Instituto de Astrofísica de Andalucía pays non établi dans la noticeStructure de recherche
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Institute of Astronomy and Space Physics pays non établi dans la noticeStructure de recherche
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Institut de Radioastronomie Millimétrique pays non établi dans la noticeStructure de recherche
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Western Sydney University pays non établi dans la noticeUniversité ou école supérieure
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China Three Gorges University Center for Astronomy and Space Sciences pays non établi dans la noticeUniversité ou école supérieure
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Osservatorio Astronomico di Palermo pays non établi dans la noticeStructure de recherche
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Pidstryhach Institute for Applied Problems of Mechanics and Mathematics pays non établi dans la noticeStructure de recherche
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National Institute for Astrophysics pays non établi dans la noticeOrganisme public
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International Centre for Radio Astronomy Research pays non établi dans la noticeInstitution
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Osservatorio Astronomico di Cagliari pays non établi dans la noticeStructure de recherche
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Herzberg Institute of Astrophysics pays non établi dans la noticeStructure de recherche
Osservatorio Astrofisico di Catania, Instituto de Astrofísica de Andalucía et Institute of Astronomy and Space Physics, avec 9 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.