Computer Science
Scientific paper
Jul 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11629p&link_type=abstract
HST Proposal ID #11629. Cycle 17
Computer Science
Scientific paper
X-ray observations of the brightest middle-aged pulsar PSR B0656+14 have shown a Wien tail of thermal emission from the neutron star surface in soft X-rays and magnetospheric emission at higher X-ray energies. Optical/near-UV observations of this pulsar have shown that its emission is predominantly magnetospheric in this range and indicated that the Rayleigh-Jeans thermal component could dominate in the far-UV. This hypothesis has been confirmed by our STIS/FUV observation, which, however, was too short to separate and study the thermal emission {only 2 of 8 allocated orbits were executed before the STIS failure}. Using the superior sensitivity of COS/FUV, we will perform phase-resolved spectroscopy and wavelength-resolved timing of the pulsar radiation in the 1105-1900 A band. The results of this observation, combined with the optical-UV and X-ray data, will allow us to firmly separate the thermal and magnetospheric components and infer the temerature and radius of the neutron star, which is important for understanding the thermal evolution of neutron stars and constraing the composition and equation of state of their superdense interiors.;
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