Interplanetary scintillation observations of an unbiased sample of 90 Ooty occultation radio sources at 326.5 MHz

Details Interplanetary scintillation observations of an unbiased sample of 90 Ooty occultation radio sources at 326.5 MHz Interplanetary scintillation observations of an unbiased sample of 90 Ooty occultation radio sources at 326.5 MHz

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.240..117b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 240, Sept. 1, 1989, p. 117-127. Research supported by t

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Extragalactic Radio Sources, Interplanetary Dust, Interstellar Extinction, Scintillation, Angular Distribution, Computational Astrophysics, Heuristic Methods, Power Spectra

Scientific paper

Results are reported from 327-MHz interplanetary scintillation (IPS) observations of an unbiased sample of 90 extragalactic radio sources selected from the ninth Ooty lunar occultation list. The sources are brighter than 0.75 Jy at 327 MHz and lie outside the galactic plane. Values of mu, the fraction of scintillating flux density, and psi, the equivalent Gaussian diameter for the scintillating structure are derived. Various correlations are found between the observed parameters. In particular, the scintillating component weakens and broadens with increasing largest angular size (LAS), and stronger scintillators have more compact scintillating components. The correlation between mu and the total source flux density found by previous workers is extended to smaller flux densities, but the three new points do not permit a distinction between a continuing upward trend or a levelling off of mu in the relation between the median values.

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