A search for changing structure in low-luminosity compact radio sources

Details A search for changing structure in low-luminosity compact radio sources A search for changing structure in low-luminosity compact radio sources

Publishing date

Dec 1984

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...287...33j&link_type=abstract

Journals

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 287, Dec. 1, 1984, p. 33-40.

Science

Astronomy and Astrophysics

Field

Astronomy

Additional info 2

4

Additional info 3

Galactic Nuclei, Galactic Structure, Radio Sources (Astronomy), Very Long Base Interferometry, Astronomical Catalogs, Luminosity, Radiant Flux Density, Radio Astronomy

Type

Scientific paper

Abstract

Low-luminosity compact radio sources in the nuclei of several nearby galaxies were observed during two 6 cm VLBI experiments. The experiments were separated by 1.75 yr and were designed to detect changes in the structure of the sources. Rather dramatic changes in structure over similar time scales are common in many of the strongest compact radio sources, and it is unknown whether such rapid changes also occur in lower luminosity compact sources. With the possible exception of NGC 4278, no evidence for any changes in structure was seen. This could be due to an absence of relativstic motion in these sources, but it is also consistent with the standard relativistic beaming models if the lower luminosity sources are oriented at larger angles to the line of sight than the high-luminosity sources.

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