The proper motion of the soft X-ray-emitting radio pulsar PSR 0656 + 14

Astronomy and Astrophysics – Astrophysics

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Pulsars, Radio Stars, Stellar Motions, X Ray Sources, Background Radiation, Nebulae, Neutron Stars, Progeny, Supernova Remnants

Scientific paper

The VLA has measured the motion of the soft X-ray-emitting radio pulsar PSR 0656 + 14 relative to background radio sources. From observations at epochs 1989.07 and 1990.38, its proper motion has been determined to be 0.078 + or - 0.012 arcsec at position angle 294 deg. For an assumed distance of 300 pc, the pulsar has a transverse velocity of about 115 km/s. PSR 0656 + 14 is very close to the geometric center of a 20 deg diameter ring of soft X-ray emission. Previous work has shown that the ages and distances of the pulsar and the ring are similar. The present measurement, which shows that the direction of the pulsar's motion is away from the center of the ring, strengthens the contention that the ring of soft X-ray emission is the 100,000 year old supernova remnant of the pulsar's progenitor.

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