Current studentsExisting staffContact us
 

Radio intra-day variability: Answers and questions

Simple item page
dc.contributor.authorJauncey, D. L.en
dc.contributor.authorKedziora-Chudczer, L.en
dc.contributor.authorLovell, James E. J.en
dc.contributor.authorMacquart, Jean-Pierreen
dc.contributor.authorNicolson, G. D.en
dc.contributor.authorPerley, R. A.en
dc.contributor.authorReynolds, J. E.en
dc.contributor.authorTzioumis, A. K.en
dc.contributor.authorWieringa, M. A.en
dc.contributor.authorBignall, Hayley Emmaen
dc.contributor.schoolSchool of Chemistry and Physics : Physics and Mathematical Physicsen
dc.date.issued2001en
dc.descriptionThe original publication can be found at www.springerlink.comen
dc.description.abstractIntra-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.en
dc.description.statementofresponsibilityDavid 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. Bignallen
dc.identifier.citationAstrophysics and Space Science, 2001; 278 (1-2):87-92en
dc.identifier.doi10.1023/A:1013195520544en
dc.identifier.issn0004-640Xen
dc.identifier.urihttp://hdl.handle.net/2440/12448
dc.language.isoenen
dc.publisherSpringeren
dc.titleRadio intra-day variability: Answers and questionsen
dc.typeJournal articleen

Files

Collections

Physics publications