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1985•Monthly Notices of the Royal Astronomical SocietyOpen access

Frequency drift in pulsar scintillation

F. G. Smith, Neil C. Wright

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Abstract

The dynamic spectra of interstellar scintillation at 408 MHz in 32 pulsars give values for bandwidth and time-scale, and for the characteristic rate of frequency drifting in spectral features. Frequency drift in scintillation patterns is related to large-scale structure in the electron density variations in the medium, while the bandwidth and time-scale of scintillation depend on smaller scale structure. A comparison of these two types of pattern characteristics show conformity with a Kolmogorov spectrum of irregularities extending over a range of scales from 109 to 1012m.

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The dynamic spectra of interstellar scintillation at 408 MHz in 32 pulsars give values for bandwidth and time-scale, and for the characteristic rate of frequency drifting in spectral features. Frequency drift in scintillation patterns is related to large-scale structure in the electron density variations in the medium, while the bandwidth and time-scale of scintillation depend on smaller scale structure. A comparison of these two types of pattern characteristics show conformity with a Kolmogorov spectrum of irregularities extending over a range of scales from 109 to 1012m.

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Available abstract

The dynamic spectra of interstellar scintillation at 408 MHz in 32 pulsars give values for bandwidth and time-scale, and for the characteristic rate of frequency drifting in spectral features. Frequency drift in scintillation patterns is related to large-scale structure in the electron density variations in the medium, while the bandwidth and time-scale of scintillation depend on smaller scale structure. A comparison of these two types of pattern characteristics show conformity with a Kolmogorov spectrum of irregularities extending over a range of scales from 109 to 1012m.

Key concepts: Physics, Pulsar, Scintillation, Astrophysics, Astronomy, Interplanetary scintillation, Nuclear physics, Optics

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