Observations of the Ablated Companion of AN Eclipsing Pulsar

Details Observations of the Ablated Companion of AN Eclipsing Pulsar Observations of the Ablated Companion of AN Eclipsing Pulsar

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5390f&link_type=abstract

HST Proposal ID #5390

Physics

Hst Proposal Id #5390 Hot Stars Neutron Stars

Scientific paper

Although the effect of millisecond pulsars on their companions is often spectacular and the range of observable features great, the means by which these pulsars ablate their companions, the physics of the pulsar eclipse and the evolutionary history of these binaries remain poorly understood. Here we propose to study one of these remarkable systems, the eclipsing pulsar PSR B1957+20 The companion of this neutron star is heated on one side to nearly 8000 K by the spin-down radiation of the pulsar; yet the face of the companion away from the neutron star is astonishingly cool. HST data obtained by us indicate a temperature less 2600 K. The observations proposed here will allow us to measure the intensity and colors of this system at minimum. This will provide valuable information on the size of the companion, and on the inclination of the binary orbit, both of which are vital for understanding the nature of pulsar eclipse and constraining the binary evolution.

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