The spectral energy distribution is
remarkably close to thermal. The best fit X-ray black body
As an isolated, radio-quiet, non-pulsing neutron star, this object affords an opportunity to observe its surface. The thermal character of the radiation, and the lack of a hard X-ray tail, suggest minimal magnetospheric emission. If we can model the surface emission, we can determine the radius. Assuming a mass (all non-accreting neutron stars seem to have masses of 1.4 solar masses), we can then probe the interior equation of state.
The molecular cloud places a 130 pc upper limit to the distance. At this distance,
Why is it detectable? Either it is still fairly young (less than a few Myr old), or it is accreting from the interstellar medium. If young, the proper motion should point to a nearby OB association. If any proper motion is detected, if cannot be accreting from the ISM.
4: Greenstein, G. & Hartke, G.J. 1983. ApJ, 271, 283.
14: Prakash, M. & Lattimer, J.M. 1997. in the Proceedings of the 18th Texas Symposium, in press.
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