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Spectral Analysis of Four Recycled Pulsars

Published online by Cambridge University Press:  27 September 2017

R. S. Foster ,
L. Fairhead  and
D. C. Backer
R. S. Foster
Affiliation:
Astronomy Department and Radio Astronomy Laboratory, University of California at Berkeley
L. Fairhead
Affiliation:
Astronomy Department and Radio Astronomy Laboratory, University of California at Berkeley
D. C. Backer
Affiliation:
Astronomy Department and Radio Astronomy Laboratory, University of California at Berkeley

Abstract

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Flux density measurements of four recycled pulsars, PSR 1620-26, PSR 1821-24, PSR 1855+09, and PSR 1937+21, have been made to determine their spectral indices in the range between 425 MHz to 3 GHz. The four objects are shown to have indices that range from –1.3 to –2.6. The luminosities of these four pulsars are spread over nearly three orders of magnitude. An analytic pulse component model is developed for each object. Individual components are allowed to have different spectral indices and hence different component ratios as a function of frequency. Component separations are evaluated as a function of frequency. The analytic models are used to determine dispersion measures with a precision better than 0.01 pc cm–3 for each object. The intrinsic pulse widths of each of these objects is less than ~4 percent of their respective pulse periods.

Type
Part IV Form and spectra of emission beams
Information
International Astronomical Union Colloquium , Volume 128: Magnetospheric structure and emission mechanisms of radio pulsars , 1992 , pp. 150 - 153
Copyright
Copyright © United States Naval Observatory 1992