Rotational parameters of PSR 0540 - 69 as measured at optical wavelengths

Details Rotational parameters of PSR 0540 - 69 as measured at optical wavelengths Rotational parameters of PSR 0540 - 69 as measured at optical wavelengths

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...394..581g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 394, no. 2, Aug. 1, 1992, p. 581-585.

Astronomy and Astrophysics

Astrophysics

40

Pulsars, Stellar Rotation, Visible Spectrum, Astronomical Spectroscopy, Ginga Satellite, Stellar Oscillations

Scientific paper

The rotation frequency of the 50 ms pulsar PSR 0540 - 69 utilizing data collected at the ESO 3.6 m telescope at La Silla is measured. The observations were acquired in the interval 1989 January-1991 April. The average pulse shape displays a broad enhancement with a superposed double-peaked structure. It was possible to phase-relate the data between 1990 March and 1991 April indicating the pulsar did not display any large spin discontinuities during that time span. Three solutions, incorporating a pulse number ambiguity of +/- 1, are presented. The preferred solution yields a braking index of 2.04 +/- 0.02, comparable with GINGA measurements in 1987. Discrepancies between these results and extrapolation of the GINGA results are discussed.

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