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Published March 11, 1993 | public
Journal Article

An association between a long-period pulsar and an old supernova remnant

Abstract

The birth of neutron stars is expected to be accompanied by supernovae of types Ib and II (which constitute the majority). But only a few associations between neutron stars and supernova remnants are known; most involve young pulsars with short periods. Older supernova remnants should also be accompanied by pulsars, but these would be less luminous and, because they would have spun down to longer periods, they would beam to a much smaller fraction of the sky. This may explain why no associations of this sort have been detected previously. Here we report a possible such association: between pulsar 2334 + 61, with a relatively long period of 0.5 s, and G114.3+ 0.3, a fairly old supernova remnant. The flat spectral index of -0.36±0.03 (refs 4, 5) and large fractional polarization suggest that the radio emission is powered by the pulsar. If so, the pulsar must have been born with a relatively short period of less than 100 ms. As the remnant is not particularly unusual morphologically, there might be many more such remnants containing pulsars that are not beamed towards us.

Additional Information

© 1993 Nature Publishing Group. Received 30 October 1992: accepted 17 January 1993. We thank the librarians and operators of the SIMBAD data base. We thank W. Reich for permission to use the image shown in Fig. 1 and T. Acevedo for help in the preparation of this figure. We learnt after the completion of this work that he and his associates have independently identified this association. S.R.K. thanks D. Frail and C. Salter for discussion and constructive criticisms, and acknowledges support from the Perkin Fund, the Packard Foundation, National Science Foundation and NASA.

Additional details

Created:
August 22, 2023
Modified:
October 23, 2023