Autor:	Stefan J. Wagner
Rok vydání:	2001
Předmět:	Physics Brightness Scintillation Space and Planetary Science Electromagnetic spectrum Astrophysics::High Energy Astrophysical Phenomena Astronomy and Astrophysics Quasar Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Blazar Cosmology Radio wave
Zdroj:	Astrophysics and Space Science. 278:105-111
ISSN:	0004-640X
DOI:	10.1023/a:1013121820969
Popis:	Intraday variability is detected in Blazars throughout the electromagnetic spectrum. Only radio emission is affected by interstellar scintillation. The characteristics of variability observed at different frequencies are often similar and suggest that intrinsic variations also contribute to the changes detected in the radio wavelength regime. This in turn implies very high brightness temperatures. Unambiguous signatures of scintillation and of intrinsic changes have been identified. The properties of intrinsic variations are reviewed to illustrate their potential contribution to variability in the radio domain. Such intrinsic changes need to be discriminated against when studying scintillation in quasars and BL Lac objects. Observations of scintillating sources and of sources with significant intrinsic IDV suggest interesting modifications to the standard paradigm of AGN.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cdd0019728e0188fccd1ea8c1823de6e https://doi.org/10.1023/a:1013121820969 Zobrazit plný text záznamu Full text from SpringerLink