File(s) not publicly available
VLBA Snapshot Imaging Survey of Scintillating Sources
journal contribution
posted on 2023-05-16, 19:29 authored by Ojha, R, Fey, AL, James LovellJames Lovell, Jauncey, DL, Johnston, KJWe present 8.4 GHz Very Long Baseline Array (VLBA) observations of 75 extragalactic radio sources drawn from the scintillating sources discovered in the Microarcsecond Scintillation-induced Variability survey. This survey clearly showed that the fraction of scintillating sources and the amplitude of their variability increases strongly with decreasing flux density, raising the possibility that scintillating sources may be systematically extremely core dominated. The observations presented here were designed to investigate this hypothesis. The results indeed show that most of the scintillating sources we observed with the VLBA have an extremely compact, core-dominated morphology, which has important implications for interpretations of the scintillation seen in these sources. In addition, these sources are potential candidates for inclusion in the International Celestial Reference Frame.
History
Publication title
The Astronomical JournalVolume
128Issue
4Pagination
1570-1587ISSN
0004-6256Department/School
School of Natural SciencesPublisher
University of Chicago PressPlace of publication
Chicago, USARepository Status
- Restricted