Discovery of an Energetic Young Pulsar Candidate Coincident with a TeV Gamma-ray Source.

Details Discovery of an Energetic Young Pulsar Candidate Coincident with a TeV Gamma-ray Source. Discovery of an Energetic Young Pulsar Candidate Coincident with a TeV Gamma-ray Source.

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20915905h&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #159.05; Bulletin of the American Astronomical Society,

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Scientific paper

The HESS TeV gamma-ray source J1813-178 is coincident with a low-surface brightness, small diameter (3.5') radio shell. A hard X-ray source discovered by ASCA also lies within the gamma-ray error circle. We have obtained Chandra observations of this source, and find a hard X-ray point-source centrally located in the radio shell and surrounded by a structured, diffuse source filling the shell which strongly resembles a pulsar wind nebular (PWN). The point-source spectrum is a power law with index 1.1, similar to that of the Vela pulsar; the PWN's spectral slope is sightly steeper 1.3 power law, typical of other young PWNe. For a distance of 8 kpc, consistent with the X-ray absorption, the 0.1-10 keV X-ray luminosity of the source is 2 x 1035 erg/s, implying a spin-down power >1037 erg/s, marking this as one of the most energetic young pulsars in the Galaxy. The TeV emission can be explained as inverse Compton scattering of CMB and ambient starlight photons off the relativistic electrons in the nebula. The results of a search for radio pulsations will be reported.
This work is supported by a grant from the Chandra Guest Investigator program.

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