Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96..836d&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 96, Sept. 1988, p. 836-840. Research supported by Harvard University and California
Astronomy and Astrophysics
Astronomy
54
Active Galactic Nuclei, Astrometry, Radio Sources (Astronomy), Red Shift, Charge Coupled Devices, Hubble Diagram, Local Group (Astronomy), Lyman Alpha Radiation
Scientific paper
New and confirmed optical identification of 12 3CR radio sources are reported, along with redshifts for nine of them. Seven have redshifts in excess of 1, with the highest being 1.841 for 3C454.1; the remaining three sources are also likely to be at z of greater than 1. One of the newly identified sources, 3C 194, shows a moderately strong Ly-alpha emission, and may be a member of the new class of objects, possible young/forming galaxies, typified by 3C 326.1 and 3C 294. The optical identification of the 3CR sources are now complete, and only six are lacking redshifts. Practically all of the new identifications are galaxies whose light appears to be dominated by stars, rather than nonthermal active nuclei, although their powerful radio emission argues that they are likely to be highly unusual objects. Their observed properties are similar to those of previously identified high-redshift powerful radio galaxies.
Breugel Wil van
Dickinson Marc
Djorgovski Stanislav
McCarthy Patrick
Spinrad Hyron
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