331 citations
- Frankfurt Institute for Advanced StudiesDE24 papers
- Goethe University FrankfurtDE19 papers
- Center for Astrophysics Harvard & SmithsonianUS14 papers
- University of VirginiaUS10 papers
- Norwegian University of Science and TechnologyNO8 papers
- Friedrich Schiller University JenaDE7 papers
- Thomas Jefferson National Accelerator FacilityUS7 papers
- Argonne National LaboratoryUS6 papers
- Chinese Academy of SciencesCN6 papers
- Florida International UniversityUS6 papers
- George Washington UniversityUS6 papers
- Hampton UniversityUS6 papers
Showing 2004Show all
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astro-ph2004★ 134 cited
VLBA Imaging of Central Engines in Radio Quiet Quasars
James S. Ulvestad, Robert R. J. Antonucci, Richard Barvainis
We have used the Very Long Baseline Array (VLBA) to image five radio-quiet quasars (RQQs) at milliarcsecond resolution, at frequencies between 1.4 and 5 GHz. These quasars have typ…
astro-ph2004★ 128 cited
Radio Variability of Radio Quiet and Radio Loud Quasars
Richard Barvainis, Joseph Lehar, Mark Birkinshaw +2
The majority of quasars are weak in their radio emission, with flux densities comparable to those in the optical, and energies far lower. A small fraction, about 10%, are hundreds…