The MHz-peaked radio spectrum of the unusualγ-ray source PMN J1603–4904
نویسندگان
چکیده
منابع مشابه
Gigahertz-Peaked Spectrum Radio Sources
The study of compact AGN which possess convex radio spectra (the gigahertz-peaked spectrum, or GPS sources) has generated a lot of interest over the last four decades, since these objects offer a unique opportunity to probe both the early evolutionary stages of relativistic AGN jets and their immediate nuclear environments. In this article I trace Ken Kellermann’s early investigations of these ...
متن کاملThe X-ray view of Giga-Hertz peaked spectrum radio galaxies
Context. This paper presents the X-ray properties of a fluxand volume-limited complete sample of 16 Giga-Hertz Peaked Spectrum (GPS) galaxies. Aims. This study addresses three basic questions in our understanding of the nature and evolution of GPS sources: a) What is the physical origin of the X-ray emission in GPS galaxies? b) What physical system is associated with the X-ray obscuration? c) W...
متن کاملRadio spectra of Gigahertz Peaked Spectrum radio sources
Awell defined sample of 72 Gigahertz Peaked Spectrum radio sources is compiled, having turnover frequencies in the range of 0.5 – 10 GHz. Using this sample, the canonical GPS radio spectrum is constructed, which is found to have a constant shape, independent of AGN type, redshift or radio luminosity. A possible deficiency of low turnover frequencies at high redshift is found, which may reflect ...
متن کاملThe evolution of GHz-peaked-spectrum radio sources
Observations of extended radio emission in some GPS sources suggest that they may not be a young version of the classical doubles. The compact source would be confined by the presence of a dense medium in the center of the galaxy. The existence of such a dense environment is supported by the observation of disturbed optical morphologies indicating galaxygalaxy interaction or mergers. A simple m...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2016
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201629547