NASA/IPAC EXTRAGALACTIC DATABASE
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For refcode 1996ApJS..105..299F:
Retrieve 42 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1996ApJS..105..299F VLBA OBSERVATIONS OF RADIO REFERENCE FRAME SOURCES. I. ALAN L. FEY US Naval Observatory, Code EO, 3450 Massachusetts Ave NW, Washington, DC 20392-5420; aley@alf.nsno.navy.nul ANDREW W. CLEGG Naval Research Laboratory, Code 7213, Washington, DC 20375-5351 clegg@funafuti.nrl.navy.mil AND EDWARD B. FOMALONT National Radio Astronomy Observatory 520 Edgemont Road, Charlottesville, VA 22903-2475;efomalon@nrao.edu Received 1995 October 13; accepted 1996 February 1 ABSTRACT We present first-epoch simultaneous dual-frequency VLBA 2 GHz and 8 GHz observations of a sample of 42 of the 560 extragalactic sources for which positions were reported by Johnston et al. Many of the observed sources have dominant cores containing the majority of the total flux density and angular sizes less than several milliarcseconds. However, at some level, almost all the observed sources show structure characteristic of a core-jet morphology, often with multiple jet components. Analysis of source structure corrections to the measured VLBI group delay, based on the images presented here, confirm that intrinsic structure contributions can be significant. These observations represent the first in a series of observations intended to image the entire set of sources presented by Johnston et al, Subject headings: galaxies: jets - galaxies: structure - radio continuum: galaxies
Retrieve 42 NED objects in this reference.
Please click here for ADS abstract

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