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Record 8 of 132
A search at the millijansky level for milli-arcsecond cores in a complete sample of radio galaxies
External Online Source: doi:10.1086/162434
Author and Affiliation:
Wehrle, A. E.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Preston, R. A.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Meier, D. L.(California Institute of Technology, Jet Propulsion Laboratory, Pasadena, CA, United States)
Gorenstein, M. V.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Shapiro, I. I.(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States)
Rogers, A. E. E.(Haystack Observatory, Westford, MA, United States)
Rius, A.(NASA Madrid, Spain)
Abstract: A complete sample of 26 extended radio galaxies was observed at 2.29 GHz with the Mark III VLBI system. The fringe spacing was about 3 milli-arcsec, and the detection limit was about 2 millijanskys. Half of the galaxies were found to possess milli-arcsec radio cores. In all but three sources, the nuclear flux density was less than 0.04 of the total flux density. Galaxies with high optical luminosity (less than -21.2) were more likely than less luminous galaxies to contain a detectable milliparcsec radio core (69 percent vs. 20 percent). For objects with arcsec cores, 80 percent were found to have a milli-arcsec core, even though the milli-arcsec object did not always contribute the greater part of the arcsec flux density.
Publication Date: Sep 15, 1984
Document ID:
19850030084
(Acquired Nov 28, 1995)
Accession Number: 85A12235
Subject Category: ASTRONOMY
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1 (ISSN 0004-637X); 284; 519-522
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Harvard-Smithsonian Center for Astrophysics; Cambridge, MA, United States
Northeast Radio Observatory Corp.; Westford, MA, United States
Instituto Nacional de Tecnica Aeroespacial; Madrid, Spain
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: GALACTIC NUCLEI; RADIO GALAXIES; VERY LONG BASE INTERFEROMETRY; FLUX DENSITY; LUMINOSITY
Imprint And Other Notes: Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 284, Sept. 15, 1984, p. 519-522. NASA-supported research.
Miscellaneous Notes: NASA-supported research
Availability Source: Other Sources
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