Discovery of a binary millisecond pulsar in the globular cluster M4

Details Discovery of a binary millisecond pulsar in the globular cluster M4 Discovery of a binary millisecond pulsar in the globular cluster M4

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.332...45l&link_type=abstract

Nature (ISSN 0028-0836), vol. 332, March 3, 1988, p. 45-47.

Computer Science

91

Binary Stars, Globular Clusters, Pulsars, Neutron Stars, Pulse Duration, X Ray Binaries

Scientific paper

The authors report the discovery of an 11-ms pulsar, PSR1620-26, in the closest globular cluster, M4. PSR1620-26 is in a low-mass binary system. This provides strong support for formation mechanisms in which an old neutron star is spun up to millisecond periods by accretion during an X-ray binary phase. The orbit's small eccentricity is likely to have significant implications for both the age of the millisecond pulsar and its surface magnetic field. It is concluded that the pulsar's current companion is, in fact, the star which was responsible for the spin-up.

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