- The spectrum of RX J185635-3754 appears to be that of the photosphere of
a cooling neutron star.
- The detection of proper motion, and the
inconsistency of a Hydrogen atmosphere with the spectral energy
distribution, suggests that accretion has not been important.
- The surface temperature is consistent with an age of about 1 Myr
- The proper motion and this age are consistent with a possible origin
in the Upper-Sco OB association.
- Planned observations will yield the distance D, the radius R, the
, and the surface
These observations may also yield the gravitational redshift
z, the surface gravity g, and the mass M.
- This object will provide a good test of interior models for isolated,
non-accreting neutron stars, free of the complications which affect
neutron stars in accreting binary systems or pulsars.
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