Interstellar Scintillation and Scattering of Micro-arc-second AGN
Access Status
Open access
Authors
Jauncey, D.
Bignall, H.
Kedziora-Chudczer, L.
Koay, J.
Lovell, J.
Macquart, Jean-Pierre
Ojha, R.
Pursimo, T.
Reynolds, C.
Rickett, B.
Date
2016Type
Journal Article
Metadata
Show full item recordCitation
Jauncey, D. and Bignall, H. and Kedziora-Chudczer, L. and Koay, J. and Lovell, J. and Macquart, J. and Ojha, R. et al. 2016. Interstellar Scintillation and Scattering of Micro-arc-second AGN. Galaxies. 4 (4): 62.
Source Title
Galaxies
ISSN
School
Department of Physics and Astronomy
Collection
Abstract
The discovery of the first quasar 3C 273 led directly to the discovery of their variability at optical and radio wavelengths. We review the radio variability observations, in particular the variability found at frequencies below 1 GHz, as well as those exhibiting intra-day variability (IDV) at cm wavelengths. Observations have shown that IDV arises principally from scintillation caused by scattering in the ionized interstellar medium of our Galaxy. The sensitivity of interstellar scintillation towards source angular sizes has provided a powerful tool for studying the most compact components of radio-loud AGN at microarcsecond and milliarcsecond scale resolution.
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