Search: onr:"swepub:oai:DiVA.org:su-157833" > HESS J1809-193 :
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000 | 13774naa a2202245 4500 | |
001 | oai:DiVA.org:lnu-120926 | |
003 | SwePub | |
008 | 230526s2023 | |||||||||||000 ||eng| | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-1209262 URI |
024 | 7 | a https://doi.org/10.1051/0004-6361/2022454592 DOI |
040 | a (SwePub)lnu | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Aharonian, F.u Dublin Inst Adv Studies, Ireland;Max Planck Inst Kernphys, Germany4 aut |
245 | 1 0 | a HESS J1809-193 :b A halo of escaped electrons around a pulsar wind nebula? |
264 | c 2023-03-01 | |
264 | 1 | b EDP Sciences,c 2023 |
338 | a electronic2 rdacarrier | |
520 | a Context. HESS J1809-193 is an unassociated very-high-energy gamma-ray source located on the Galactic plane. While it has been connected to the nebula of the energetic pulsar PSR J1809-1917, supernova remnants and molecular clouds present in the vicinity also constitute possible associations. Recently, the detection of gamma-ray emission up to energies of similar to 100 TeV with the HAWC observatory has led to renewed interest in HESS J1809-193.Aims. We aim to understand the origin of the gamma-ray emission of HESS J1809-193.Methods. We analysed 93.2 h of data taken on HESS J1809-193 above 0.27 TeV with the High Energy Stereoscopic System (H.E.S.S.), using a multi-component, three-dimensional likelihood analysis. In addition, we provide a new analysis of 12.5 yr of Fermi-LAT data above 1 GeV within the region of HESS J1809-193. The obtained results are interpreted in a time-dependent modelling framework.Results. For the first time, we were able to resolve the emission detected with H.E.S.S. into two components: an extended component (modelled as an elongated Gaussian with a 1-sigma semi-major and semi-minor axis of similar to 0.62 degrees and similar to 0.35 degrees, respectively) that exhibits a spectral cutoff at similar to 13 TeV, and a compact component (modelled as a symmetric Gaussian with a 1-sigma radius of similar to 0.1 degrees) that is located close to PSR J1809-1917 and shows no clear spectral cutoff. The Fermi-LAT analysis also revealed extended gamma-ray emission, on scales similar to that of the extended H.E.S.S. component.Conclusions. Our modelling indicates that based on its spectrum and spatial extent, the extended H.E.S.S. component is likely caused by inverse Compton emission from old electrons that form a halo around the pulsar wind nebula. The compact component could be connected to either the pulsar wind nebula or the supernova remnant and molecular clouds. Due to its comparatively steep spectrum, modelling the Fermi-LAT emission together with the H.E.S.S. components is not straightforward. | |
650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
653 | a acceleration of particles | |
653 | a radiation mechanisms | |
653 | a non-thermal | |
653 | a pulsars | |
653 | a individual | |
653 | a PSR J1809-1917 | |
653 | a gamma rays | |
653 | a general | |
653 | a Astroparticle Physics | |
653 | a Astropartikelfysik | |
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773 | 0 | t Astronomy and Astrophysicsd : EDP Sciencesg 672q 672x 0004-6361x 1432-0746 |
856 | 4 | u https://doi.org/10.1051/0004-6361/202245459y Fulltext |
856 | 4 | u https://lnu.diva-portal.org/smash/get/diva2:1759626/FULLTEXT01.pdfx primaryx Raw objecty fulltext:print |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-120926 |
856 | 4 8 | u https://doi.org/10.1051/0004-6361/202245459 |
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