1. e-VLBI observations of GHz-peaked spectrum radio sources in nearby galaxies from the AT20G survey.
- Author
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Hancock, Paul J., Tingay, Steven J., Sadler, Elaine M., Phillips, Chris, and Deller, Adam T.
- Subjects
- *
VERY long baseline interferometry , *SPECTRUM analysis , *GALAXY clusters , *SURVEYS , *RADIO galaxies - Abstract
Gigahertz-peaked spectrum (GPS) radio sources are thought to be young objects which later evolve into Fanaro–Riley type I (FR I) and FR II radio galaxies. We have used the Australia Telescope 20 GHz (AT20G) survey catalogue to select a uniform sample of GPS sources with spectral peaks above 5 GHz, which should represent the youngest members of this class. In this paper, we present e-VLBI observations of 10 such objects which are associated with nearby galaxies and so represent a new population of local, low-power GPS sources. Our e-VLBI observations were carried out at 4.8 GHz with the Australia Telescope Long Baseline Array (LBA) using a real-time software correlator. All 10 sources were detected, and were unresolved on scales of ∼100 mas, implying that they are typically less than 100 pc in linear size. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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