Suzaku observations of the old pulsar wind nebula candidate HESS J1356-645
Abstract
A largely extended X-ray emission was discovered around the pulsar PSR J1357-6429 with the Suzaku deep observations. The pulsar, whose characteristic age is 7.3 kyr, is located within the TeV γ-ray source HESS J1356-645. The extended emission is found to have a 1 σ X-ray size of ∼ 4', or ∼ 3 pc at 2.4 kpc, with a small offset from the pulsar. Its X-ray spectrum is well reproduced by a simple power-law model with a photon index of 1.70_{-0.06}^{+0.07}. No significant spatial variation was found for the X-ray photon index as a function of distance from the pulsar. We conclude that the extended emission is associated to the pulsar wind nebula (PWN) of PSR J1357-6429. This is a new sample of largely extended nebulae around middle-aged pulsars. We discuss the evolution of this PWN according to the relic PWN scenario.
- Publication:
-
Publications of the Astronomical Society of Japan
- Pub Date:
- June 2015
- DOI:
- 10.1093/pasj/psv013
- arXiv:
- arXiv:1502.03893
- Bibcode:
- 2015PASJ...67...43I
- Keywords:
-
- ISM: individual objects (HESS J1356-645;
- PSR J1357-6429);
- X-rays: ISM;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 13 pages, 7 figures, PASJ, accepted