Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...276l...5j&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 276, Jan. 1, 1984, p. L5-L8.
Astronomy and Astrophysics
Astronomy
11
Mapping, Radio Sources (Astronomy), Very Long Base Interferometry, Astronomical Maps, Centimeter Waves
Scientific paper
The milli-arcsecond scale radio structure of CTA 21 has been mapped with a VLBI array at 6 cm. At this wavelength, the source has a double structure, with a separation of about 12 milli-arcsec in a position angle of -20 deg. Both components may be partially resolved in directions nearly perpendicular to the line joining them, which would be unusual for a very compact radio source. CTA 21 is among the few strong, compact-core-dominated radio sources which have not been mapped at any frequency above 1 GHz until now. It may be a new member of the class of compact doubles discovered by Phillips and Mutel.
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