Abstract
view Abstract Citations (10) References (10) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Dual-frequency VLBI observations of extragalactic sources with distinctive radio spectra Spangler, S. R. ; Benson, J. M. ; Cordes, J. M. ; Hall, R. B. ; Jones, T. W. ; Johnston, K. J. Abstract A continental baseline interferometer at 6.0 and 18.0 cm has been used to obtain Very Long Baseline Interferometer (VLBI) observations of ten sources whose spectra indicate that they may consist of a single component. An attempt was made to determine whether the integrated spectral shapes of the sources were due to the spectral properties of a single dominant component or to the superposition of several components that become optically thick at different frequencies. Two of the sources, 0202 + 31 and 2134 + 00, apparently possess structures consisting of more than one component, implying that the spectral shape is due to subcomponent superposition. The VLBI observations for the remaining sources are consistent with the model derived from the source spectrum, and do not indicate the existence of two or more spatially separated subcomponents. Publication: The Astronomical Journal Pub Date: August 1981 DOI: 10.1086/112994 Bibcode: 1981AJ.....86.1155S Keywords: Extragalactic Radio Sources; Radio Spectra; Very Long Base Interferometry; Astronomical Models; Data Reduction; Optical Thickness; Radiant Flux Density; Relativity; Astronomy full text sources ADS | data products NED (8)
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