A Bow-Shock Nebula Around a Compact X-ray Source in the Supernova Remnant IC 443

Details A Bow-Shock Nebula Around a Compact X-ray Source in the Supernova Remnant IC 443 A Bow-Shock Nebula Around a Compact X-ray Source in the Supernova Remnant IC 443

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...19713006k&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #130.06; Bulletin of the American Astronomical Society, Vol. 33, p.715

Astronomy and Astrophysics

Astronomy

Scientific paper

We present high resolution images of the hard X-ray feature along the southern edge of the supernova remnant IC 443. Data from the Chandra X-ray Observatory reveal a comet-shaped nebula of hard emission, which contains a softer point source at its apex. We also present 20 cm, 6 cm, and 3.5 cm images from the Very Large Array, which clearly show the cometary nebula. The spectrum of the soft point source is adequately fit by a black body model (kT=0.7+/-0.1 keV, with a maximum surface area of 0.03 km2). Based on the radio and X-ray morphology and spectrum, and the radio polarization properties, we argue that this object is a synchrotron nebula powered by the compact source. The derived parameters of the system favor an interpretation in which the central object is a young, energetic neutron star physically associated with IC 443. The soft emission is likely originating from a hot spot on the surface the neutron star. The cometary morphology of the nebula is the result of the supersonic motion of the pulsar (VPSR ~ 250 +/- 50 km s-1), which causes the relativistic wind of the pulsar to terminate in a bow shock and trail behind as a synchrotron tail. This velocity is consistent with an age of 30,000 years for the SNR and its associated pulsar. This research was funded by NASA grant NRA 97-0SS-14.

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