Slow scintillation in the interstellar medium

Details Slow scintillation in the interstellar medium Slow scintillation in the interstellar medium

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...134..390r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 134, no. 2, May 1984, p. 390-395.

Astronomy and Astrophysics

Astrophysics

188

Interstellar Matter, Pulsars, Scintillation, Electron Density (Concentration), Extragalactic Radio Sources, Power Spectra, Signal Fading

Scientific paper

The slow fading of pulsars, on time scales of days to months, is shown to be due to interstellar scintillation (ISS). The fluctuations in electron density which cause the slow fading are part of the same power law spectrum which produces the "normal" (minutes to hours) ISS. The spectrum appears to be power law from scales of less than 108 m to at least 1013 m. The component of ISS which produces slow fading is relatively broad band and is less sensitive to source size than the normal component. It is speculated that other slow variations in source intensity, particularly, those of "low frequency variables", may also be caused by the interstellar medium.

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