Evidence for geodetic spin precession in the binary pulsar 1913 + 16

Details Evidence for geodetic spin precession in the binary pulsar 1913 + 16 Evidence for geodetic spin precession in the binary pulsar 1913 + 16

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347.1030w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 347, Dec. 15, 1989, p. 1030-1033.

Astronomy and Astrophysics

Astrophysics

74

Binary Stars, Geodetic Accuracy, Gravitational Fields, Pulsars, Spin Dynamics, Companion Stars, Flux Density, Neutron Stars, Pulse Duration, Stellar Mass

Scientific paper

Six years of careful observations have revealed a gradual secular evolution in the pulse profile of binary pulsar PSR 1913 + 16. At frequencies near 1400 MHz, the flux density in the first component of the double-peaked profile is decreasing relative to the second component at a rate slightly greater than 1 percent per year. The changes are consistent with the expected rate of general relativistic geodetic precession of the pulsar spin axis. In addition to its relativistic implications, the precessional motion is providing unique two-dimensional information on the structure of the pulsar emission zone.

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