Measurements of the trigonometric parallax of pulsars

Details Measurements of the trigonometric parallax of pulsars Measurements of the trigonometric parallax of pulsars

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.280..477s&link_type=abstract

Nature, vol. 280, Aug. 9, 1979, p. 477, 478.

Physics

32

Milky Way Galaxy, Parallax, Position (Location), Pulsars, Electron Density (Concentration), Microwave Interferometers, Root-Mean-Square Errors, Trigonometry

Scientific paper

Measurements and methods of calculation for observing the distances of pulsars from the earth and the sun are presented. Twenty-six pulsars were studied over a period of four years and of these only 9 showed consistent data, on which all calculations were based. Observations were conducted employing a radio-link interferometer with a 76 m MkIA telescope and a 25 m telescope using a 127 km baseline. Calculations were made to determine the parallax, dispersion measure and electron density, derived essentially from those pulsars within 500 pc of the sun. The results confirmed that the local electron density of pulsars lies in a range of 0.03 and 0.025/cu cm and that the present birth rates are at a (high) level of 1 every 4 and 15 years.

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