Radio intra-day variability: Answers and questions
Date
2001
Authors
Jauncey, D. L.
Kedziora-Chudczer, L.
Lovell, James E. J.
Macquart, Jean-Pierre
Nicolson, G. D.
Perley, R. A.
Reynolds, J. E.
Tzioumis, A. K.
Wieringa, M. A.
Bignall, Hayley Emma
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Astrophysics and Space Science, 2001; 278 (1-2):87-92
Statement of Responsibility
David L. Jauncey, Lucyna Kedziora-Chudczer, James E.J. Lovell, Jean-Pierre Macquart, George D. Nicolson, Rick A. Perley, John E. Reynolds, Anastasios K. Tzioumis, Mark H. Wieringa and Hayley E. Bignall
Conference Name
Abstract
Intra-day variability (IDV) of active galactic nuclei (AGN) has been detected from gamma-ray energies to radio wavelengths. At high energies, such variability appears to be intrinsic to the sources themselves. However, at radio wavelengths, brightness temperatures as high as1018 to 1021 K are encountered if the IDV is intrinsic to the source. We discuss here the accumulating evidence showing that, at radio wavelengths where the highest brightness temperatures are encountered, interstellar scintillation (ISS) is the principal mechanism causing IDV. While ISS reduces the implied brightness temperatures, they still remain uncomfortably high.
School/Discipline
School of Chemistry and Physics : Physics and Mathematical Physics
Dissertation Note
Provenance
Description
The original publication can be found at www.springerlink.com