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Discovery of an X-ray nebula around PSR J1718-3825 and implications for the nature of the α-ray source HESS J1718-385

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posted on 24.10.2012, 09:09 by J. A. Hinton, S. Funk, S. Carrigan, K. Kosack, Y. A. Gallant, De Jager OC, A. Lemière, G. Pühlhofer
Combined X-ray synchrotron and inverse-Compton $\gamma$-ray observations of pulsar wind nebulae (PWN) may help to elucidate the processes of acceleration and energy loss in these systems. In particular, such observations provide constraints on the particle injection history and the magnetic field strength in these objects. The newly discovered TeV $\gamma$-ray source HESS J1718-385 has been proposed as the likely PWN of the high spin-down luminosity pulsar PSR J1718-3825. The absence of previous, sensitive X-ray measurements of this pulsar, and the unusual energy spectrum of the TeV source, motivated observations of this region with XMM-Newton. The data obtained reveal a hard-spectrum X-ray source at the position of PSR 1718-3825 and evidence of diffuse emission in the vicinity of the pulsar. We derive limits on the keV emission from the centroid of HESS J1718-385 and discuss the implications of these findings for the PWN nature of this object.

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Citation

Astronomy & Astrophysics, 2007, 476 (3)

Version

VoR (Version of Record)

Published in

Astronomy & Astrophysics

Publisher

EDP Sciences for European Southern Observatory (ESO)

issn

0004-6361

eissn

1432-0746

Copyright date

2007

Available date

24/10/2012

Publisher version

http://www.aanda.org/articles/aa/abs/2007/48/aa8775-07/aa8775-07.html

Language

en

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