Anomalous scattering of highly dispersed pulsars

(2) Jodrell Bank Observatory; A.G. Lyne (2) ((1) MPI f. Radioastr.; Bonn; D. Mitra (1); D.R. Lorimer (2); Germany; M. Kramer (2); O. Loehmer (1); UK); Univ. of Manchester

arxiv: astro-ph/0111165 · v1 · submitted 2001-11-08 · 🌌 astro-ph

Anomalous scattering of highly dispersed pulsars

O. Loehmer (1) , M. Kramer (2) , D. Mitra (1) , D.R. Lorimer (2) , A.G. Lyne (2) ((1) MPI f. Radioastr. , Bonn , Germany , (2) Jodrell Bank Observatory

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Univ. of Manchester UK)

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keywords broadeningdispersedexpectedfrequencyhighlypulsarsscattertimes

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We report multifrequency measurements of scatter broadening times for nine highly dispersed pulsars over a wide frequency range (0.6 -- 4.9 GHz). We find the scatter broadening times to be larger than expected and to scale with frequency with an average power-law index of $3.44\pm 0.13$, i.e. significantly less than that expected from standard theories. Such possible discrepancies have been predicted very recently by Cordes & Lazio.

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Anomalous scattering of highly dispersed pulsars

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