Implications of the PSR 1257+12 Planetary System for Isolated Millisecond Pulsars

Details Implications of the PSR 1257+12 Planetary System for Isolated Millisecond Pulsars Implications of the PSR 1257+12 Planetary System for Isolated Millisecond Pulsars

2000-12-02

arxiv.org/abs/astro-ph/0012042v1

Astronomy and Astrophysics

Astrophysics

17 pages including one figure, uses aaspp4, accepted by ApJ

Scientific paper

10.1086/319813

The first extrasolar planets were discovered in 1992 around the millisecond pulsar PSR 1257+12. We show that recent developments in the study of accretion onto magnetized stars, plus the existence of the innermost, moon-sized planet in the PSR 1257+12 system, suggest that the pulsar was born with approximately its current rotation frequency and magnetic moment. If so, this has important implications for the formation and evolution of neutron star magnetic fields as well as for the formation of planets around pulsars. In particular, it suggests that some and perhaps all isolated millisecond pulsars may have been born with high spin rates and low magnetic fields instead of having been recycled by accretion.

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