Vela X is a large, 3ı 2ı, radio-emitting pulsar wind nebula (PWN) powered by the Vela pulsar in the Velasupernova remnant. Using four Suzaku/XIS observations pointed just outside Vela X, we have found hard X-rayemission extending throughout the fields of view. The hard X-ray spectra are well represented by a power-law.The photon index was measured to be constant at Γ 2.4, similar to that of the southern outer part of Vela X.The power-law flux decreases with increasing distance from the pulsar. These properties lead us to propose thatthe hard X-ray emission is associated with the Vela PWN. The larger X-ray extension found in this work stronglysuggests that distinct populations of relativistic electrons form the X-ray PWN and Vela X, as was recently inferredfrom multiwavelength spectral modeling of Vela X.
|Numero di pagine||10|
|Rivista||PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN|
|Stato di pubblicazione||Published - 2011|
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