A VLBI search for compact components in extended high redshift quasars

Details A VLBI search for compact components in extended high redshift quasars A VLBI search for compact components in extended high redshift quasars

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...126...16b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 126, no. 1, Sept. 1983, p. 16-21. Research supported by the Netherlands Founda

Astronomy and Astrophysics

Astrophysics

11

Extragalactic Radio Sources, Quasars, Very Long Base Interferometry, Radio Spectra, Red Shift

Scientific paper

Sensitive 21 cm VLBI observations of components in extended high-redshift quasars have been made with the European Network. In most sources in the sample, compact (<1 kpc) components of varying complexity were detected; these components account for a substantial fraction of the total source flux density. Identification with hot spots in the radio lobes was possible in most cases. Some ultracompact hot spots were detected, with energy densities of the order of 10-6 erg/cm3. Two kpc-size double sources at redshifts of 1.875 and 2.594 have been found. Correlations between "compactness" and other parameters are briefly discussed, as well as cosmological implications.

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