The Impact of Interstellar Scintillation on Astrometric VLBI

Jauncey, David; Lovell, James; Ojha, Roopesh; Fey, Alan L.; Koyama, Yasuhiro; Bignall, Hayley E.; Kedziora-Chudczer, Lucyna; Macquart, Jean-Pierre; Rickett, Barney J.; Titov, Oleg; Tzioumis, Anastasios K.; The Impact of Interstellar Scintillation on Astrometric VLBI; General Meeting Proceedings, p. 109-112; http://articles.adsabs.harvard.edu/pdf/2004ivsg.conf..109J

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Abstract

We review the evidence demonstrating the interstellar scintillation (ISS) is the principal mechanism responsible for the intra-day variability (IDV) seen at cm wavelengths in many compact, flat-spectrum extra-galactic radio sources. The presence of ISS in a radio source implies the presence of microarcsecond structure in the source. We examine the implications of such compact structure, and suggest that these ultra-compact radio scintillators may form a significant part of the next generation International Celestial Reference Frame (ICRF) sources because of their high level of compactness and positional stability.

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Except where otherwise noted, this item's license is described as This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.