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High-energy flux evolution of Pulsar Wind Nebulae
Mattana F., Falanga M., Götz D., Terrier R., Esposito P. et al
Dans High Energy Gamma-Ray Astronomy: Proceedings of the 4th International Meeting on High Energy Gamma-Ray Astronomy - 4th International Meeting on High Energy Gamma-Ray Astronomy, Heidelberg : Allemagne (2008) - http://hal.in2p3.fr/in2p3-00369625
Physique/Astrophysique/Phénomènes cosmiques de haute energie
Planète et Univers/Astrophysique/Phénomènes cosmiques de haute energie
High-energy flux evolution of Pulsar Wind Nebulae
F. Mattana1, 2, M. Falanga3, D. Götz3, R. Terrier1, P. Esposito2, A. Pellizzoni, A. De Luca2, V. Marandon1, A. Goldwurm1, P. Caraveo2
1 :  APC - UMR 7164 - AstroParticule et Cosmologie
http://www.apc.univ-paris7.fr/
CNRS : UMR7164 – IN2P3 – Observatoire de Paris – Université Paris VII - Paris Diderot – CEA : DSM/IRFU
APC - UMR 7164, Université Paris Diderot, 10 rue Alice Domon et Léonie Duquet, case postale 7020, F-75205 Paris Cedex 13
France
2 :  Istituto di Astrofisica Spaziale e Fisica cosmica - INAF
Istituto Nazionale di Astrofisica
Milano
Italie
3 :  SEDI - Service d'Electronique, des Détecteurs et d'Informatique
CEA : DSM/IRFU
France
APC - AHE
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.

Communications avec actes
12/2008
07/2008
High Energy Gamma-Ray Astronomy: Proceedings of the 4th International Meeting on High Energy Gamma-Ray Astronomy
internationale
1085
Felix A. Aharonian, Werner Hofmann, Frank Rieger.
308-311
American Institute of Physics
American Institute Of Physics Conference Proceedings

4th International Meeting on High Energy Gamma-Ray Astronomy
Heidelberg
Allemagne
07/07/2008
11/07/2008

pulsars – nebulae – gamma-ray spectra – X-ray spectra