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Radio Source Variability as a Tool for Very High Resolution

Published online by Cambridge University Press:  19 July 2016

N. Shapirovskaya ,
O. B. Slee ,
P. Hughes  and
G. Tsarevsky
N. Shapirovskaya
Affiliation:
Astro Space Centre, Moscow, Russia
O. B. Slee
Affiliation:
Australia Telescope National Facility, CSIRO, Sydney
P. Hughes
Affiliation:
Astronomy Department, University of Michigan, Ann Arbor, USA
G. Tsarevsky
Affiliation:
Astro Space Centre, Moscow, Russia Australia Telescope National Facility, CSIRO, Sydney

Abstract

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If flux density variability is intrinsic to extragalactic sources, then the shortest time scale of the variability yields an extremely high angular resolution. There is, however, good evidence that some of the variability is due to refractive scintillation in our galaxy's interstellar plasma turbulence. The effect, initially discovered at low radio frequencies, is here shown to extend into the GHz band, which, up to now, has been assumed to display only the intrinsic variability. We conclude that further study in both the intermediate and high frequency bands needed to separate the intrinsic and extrinsic components of variability.

Type
Instrumentation and Techniques
Information
Symposium - International Astronomical Union , Volume 158: Very High Angular Resolution Imaging , 1994 , pp. 201 - 203
Copyright
Copyright © Kluwer 1994 

References

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