Astronomy and Astrophysics – Astronomy
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...184.0802e&link_type=abstract
American Astronomical Society, 184th AAS Meeting, #08.02; Bulletin of the American Astronomical Society, Vol. 26, p.870
Astronomy and Astrophysics
Astronomy
Scientific paper
The binary millisecond pulsar J0437--4715 has been detected in emission with the Extreme Ultraviolet Explorer. Direct pointing measurements joined with data from the deep sky survey provide spectral constraints on the source. For a pulsar at a known distance and using our derived spectrum, we derive the total hydrogen column density. We combine this with radio data to obtain independent estimates of N_e and N_H. If we assume a nominal pulsar distance of 140 pc and a thermal spectrum then a source of heating is required to explain the emission from a neutron star with a characteristic age of over a Gyr. Both external and internal heating sources are possible, including accretion from the binary companion or the ISM, polar cap heating, dissipation at the crust/core interface, and exotic nuclear sources. This work has been supported by NAS5-30180.
Bowyer Stuart
Edelstein José
Foster Roger S.
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