A millisecond pulsar in a 32-minute binary orbit

Details A millisecond pulsar in a 32-minute binary orbit A millisecond pulsar in a 32-minute binary orbit

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.342..158a&link_type=abstract

Nature (ISSN 0028-0836), vol. 342, Nov. 9, 1989, p. 158-161.

Computer Science

24

Binary Stars, Globular Clusters, Pulsars, White Dwarf Stars, Doppler Effect, Radio Telescopes, Relativity, Stellar Mass, Stellar Orbits

Scientific paper

The discovery of a millisecond pulsar in the globular cluster 47 Tucanae is reported. It has a spin period of 4.479 ms and is a member of a binary system with an orbital period of 32 min and an eccentricity of 0.32. The mass function, 2.9 x 10 to the -8th solar mass, is the smallest value for any known binary system. It is found that the observations are consistent with a neutron star of mass 1.4 solar and a white-dwarf companion of mass 0.8 solar. The millisecond spin period combined with the very short orbital period offers, for the first time, the possibility of observing spin-orbit coupling effects predicted by general relativity theory.

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