Low-frequency VLBI in space and interstellar refraction

Details Low-frequency VLBI in space and interstellar refraction Low-frequency VLBI in space and interstellar refraction

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.224..927d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 224, Feb. 15, 1987, p. 927-934.

Astronomy and Astrophysics

Astronomy

3

Extragalactic Radio Sources, Interstellar Space, Low Frequencies, Quasat, Radio Wave Refraction, Scintillation, Very Long Base Interferometry, Interplanetary Medium, Ionospheric Propagation

Scientific paper

The proposed orbiting Quasat antenna, equipped with a low-frequency capability (e.g. 327 MHz), would be uniquely suited for studying refractive focusing (slow scintillation) in the interstellar medium, which is suspected of being responsible for at least some apparent low-frequency variability of extragalactic sources. The authors consider in some detail various technical considerations, including the decorrelating effects of the ionosphere and interplanetary medium, and conclude that low-frequency VLBI observations involving Quasat and Earth-based antennas would be feasible, particularly if sources are observed when they are in the anti-solar hemisphere.

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