| Thème(s) : |
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| Titre : |
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High-energy flux evolution of Pulsar Wind Nebulae |
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| Auteur : |
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F. Mattana1, 2, M. Falanga3, D. Götz3, R. Terrier1, P. Esposito2, A. Pellizzoni, A. De Luca2, V. Marandon1, A. Goldwurm1, P. Caraveo2 |
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| Laboratoire : |
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| équipe(s) de recherche : |
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APC - AHE |
| Résumé : |
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The very high energy γ-ray spectra of Pulsar Wind Nebulae are interpreted as due to inverse Compton scattering of ultrarelativistic electrons on the ambient photons, whereas their X-ray spectra are due to synchrotron emission. We investigate the relation between the γ- and X-ray emission and the pulsars' spin-down luminosity and characteristic age. We find that the γ-to X-ray flux ratio of the nebulae is inversely proportional to the spin-down luminosity (~Ė-1.9) and to the characteristic age (~τc2.2) of the parent pulsar. We interpret these results as due to the evolution of the electron energy distribution and the nebular dynamics, supporting the idea of so-called relic pulsar wind nebulae. These empirical relations provide a new tool to classify unidentified diffuse γ-ray sources and to estimate the spin-down luminosity and characteristic age for four rotation powered pulsars with no detected pulsation from the X- and γ-ray properties of the associated pulsar wind nebulae. |
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| Type de publication : |
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Communications avec actes |
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Date de publication
ou d'écriture : |
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12/2008 |
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| Date de la présentation : |
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07/2008 |
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Nom du périodique
Titre de l'ouvrage : |
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High Energy Gamma-Ray Astronomy: Proceedings of the 4th International Meeting on High Energy Gamma-Ray Astronomy |
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| Audience : |
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internationale |
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| Volume : |
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1085 |
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| Editeurs scientifiques : |
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Felix A. Aharonian, Werner Hofmann, Frank Rieger. |
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| Page/Article : |
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308-311 |
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| Editeur : |
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American Institute of Physics |
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| Collection : |
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American Institute Of Physics Conference Proceedings |
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| Nom du colloque : |
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4th International Meeting on High Energy Gamma-Ray Astronomy |
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| Ville du colloque : |
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Heidelberg |
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| Pays du colloque : |
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Allemagne |
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| Date du colloque (début) : |
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07/07/2008 |
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| Date du colloque (fin) : |
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11/07/2008 |
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| Mot(s)-clé(s) : |
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pulsars – nebulae – gamma-ray spectra – X-ray spectra |
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