Is there a young pulsar in PKS 1209-52?

Details Is there a young pulsar in PKS 1209-52? Is there a young pulsar in PKS 1209-52?

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996cit..reptr....k&link_type=abstract

Technical Report, California Inst. of Tech. Pasadena, CA United States Owens Valley Radio Observatory.

Astronomy and Astrophysics

Astronomy

Pulsars, Supernova Remnants, X Ray Sources, X Rays, Neutron Stars, Pulsar Magnetospheres, Emission Spectra, X Ray Astronomy, Surface Cooling, Thermal Emission

Scientific paper

Non-thermal X-radiation is radiated by pulsars which are capable of accelerating relativistic elections in voltage gaps in the pulsar magnetosphere. Pulsed thermal blackbody-like emission has also been observed in four energetic pulsars; but in all these cases X-rays could be due to a reverse current of relativistic electrons bombarding and heating the surface, and not due to the surface cooling. In other words, it is very difficult to disentangle surface cooling emission from the total of X-rays observed from magnetospherically active pulsars. Therefore no firm cooling neutron star candidate has been discovered, despite constant scrutiny of the sky in X-rays during the last 20 years. We have obtained Advanced Satellite for Cosmology and Astrophysics (ASCA) observations of a strong candidate for a cooling neutron star. This is the intriguing X-ray source 1E 1207.4-5209, a point-like source situated centrally in the large diameter supernova remnant PKS 1209-51/52. Using ASCA's superior capability for X-ray spectroscopy, we infer an absorbed blackbody emitter at a temperature of approx. 3 x 106 K, with a luminosity of 0.5 solar luminosity. The radiating surface is approx. 30 sq. km, a small fraction of the total surface of a neutron star. The X-rays, however, are not pulsed. A new X-ray source discovered in the bright SNR Puppis-A and 1E 1207.4-5209, ar thus-far the best candidates for initial cooling neutron stars.

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