出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Vela X powered by the Vela pulsar is the best example of an evolved pulsar wind nebula, allowing to access the interaction with the supernova ejecta and the particle injection history. We present the spectrum of Vela X in the 20-300 keV energy range as measured by IBIS/ISGRI and SPI, the main instruments onboard the INTEGRAL satellite. The apparent discrepancy between IBIS/ISGRI, SPI, and previous measurements is understood in terms of point spread function, pointing out a nebula more diffuse than previously thought. The presence of cooled electrons is also revealed by the spectral break measured including Suzaku data in the 1-10 keV range. This picture is supported by the identification of a new structure in the energy band above 18 keV, extended along the NE/SW axis and partially coincident with the cocoon, the soft X-ray filament extending towards the centre of the remnant.
