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The hard X-ray emission from the Vela pulsar wind nebula |
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| Institution: | 1. Istituto di Astrofisica Spaziale e Fisica Cosmica – Sezione di Palermo, INAF-CNR, Via Ugo La Malfa 153, I-90146 Palermo, Italy;2. Osservatorio Astronomico di Palermo, Piazza dei Normanni 1, I-90100 Palermo, Italy;3. Dipartimento di Fisica, Universitá La Sapienza, Piazzale A. Moro 2, I-00185 Roma, Italy;4. Istituto di Astrofisica Spaziale e Fisica Cosmica – Sezione di Roma, INAF-CNR, Via del Fosso del cavaliere 100, I-00113 Roma, Italy |
| Abstract: | We present the results of a preliminary spectral analysis performed on the BeppoSAX and XMM observations of the Vela plerion. The broad energy range covered by the instruments on board the two observatories allows an evaluation of the spectral parameters of the high energy emission model and provides an indication on the morphology of the source emission above 10 keV. We confirm the softening of the PWN spectrum (3–10 keV band) at distances greater than 4′ from the pulsar and estimate the diameter of the high energy (>10 keV) emission region to be on the order of 25′–30′. |
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