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Accession Number N20120011742
Title Suzaku Detection of Diffuse Hard X-Ray Emission Outside Vela X.
Publication Date 2011
Media Count 18p
Personal Author A. Bamba F. Bocchino H. Tsunemi H. Uchida H. Yamaguchi J. W. Hewitt K. Mori M. Miceli R. Petre R. Yoshii S. Katsuda T. Temim
Abstract Vela X is a large, 3 deg x 2 deg, radio-emitting pulsar wind nebula (PWN) powered by the Vela pulsar in the Vela supernova remnant. Using four Suzaku/XIS observations pointed just outside Vela X, we find hard X-ray emission extending throughout the fields of view. The hard X-ray spectra are well represented by a power-law. The photon index is measured to be constant at Gamma approximates 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 that the hard X-ray emission is associated with the Vela PWN. The larger X-ray extension found in this work strongly suggests that distinct populations relativistic electrons form the X-ray PWN and Vela X, as was recently inferred from multiwavelength spectral modeling of Vela X.
Keywords Interstellar matter
Relativistic particles
Spaceborne astronomy
Spaceborne telescopes
Stellar evolution
Supernova remnants
Synchrotron radiation
X ray astronomy
X ray spectra
X ray telescopes
X rays

Source Agency National Aeronautics and Space Administration
NTIS Subject Category 54B - Astronomy & Celestial Mechanics
Corporate Author Goddard Space Flight Center, Greenbelt, MD.
Document Type Journal article
Title Note N/A
NTIS Issue Number 1301
Contract Number N/A

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