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Accession Number
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N20120011742
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Title
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Suzaku Detection of Diffuse Hard X-Ray Emission Outside Vela X.
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Publication Date
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2011
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Media Count
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18p
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Personal Author
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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
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Abstract
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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.
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Keywords
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Interstellar matter
Nebulae
Pulsars
Relativistic particles
Spaceborne astronomy
Spaceborne telescopes
Stellar evolution
Supernova remnants
Synchrotron radiation
X ray astronomy
X ray spectra
X ray telescopes
X rays
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Source Agency
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National Aeronautics and Space Administration
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NTIS Subject Category
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54B - Astronomy & Celestial Mechanics
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Corporate Author
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Goddard Space Flight Center, Greenbelt, MD.
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Document Type
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Journal article
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Title Note
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N/A
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NTIS Issue Number
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1301
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Contract Number
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N/A
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