Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jpl..rept.....j&link_type=abstract
Technical Report, Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States
Astronomy and Astrophysics
Astronomy
Radio Galaxies, Active Galactic Nuclei, Accretion Disks, Radio Jets (Astronomy), Image Analysis, Radio Astronomy, Very Long Baseline Array (Vlba), Line Of Sight, Luminosity, Relativistic Effects
Scientific paper
We have imaged the nucleus of the nearby radio galaxy NGC 4261 (3C270) with the VLBA at 1.6, 8.4, 22, and 43 GHz. At 8.4 GHz our image reveals a narrow gap in emission just east of the core, which we interpret as absorption by an inner accretion disk seen nearly edge-on. If correct, this interpretation implies that the radio jets are almost perpendicular to our line of sight. Thus, NGC 4261 provides an unusually good opportunity to measure component proper motions in both jet and counterjet, free from most relativistic beaming effects. Observations to do this are underway. This is one of the very few sources in which both jet and counterjet are detectable on parsec scales, and it is also one of the closest "classical" double-lobed radio galaxies. Consequently, NGC 4261 is a good laboratory for testing models of jets in low luminosity radio galaxies.
Jones Dayton
Wehrle Ann
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