4C 18.68: A QSO with precessing radio jets?

Details 4C 18.68: A QSO with precessing radio jets? 4C 18.68: A QSO with precessing radio jets?

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...253l...1g&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 253, Feb. 1, 1982, p. L1-L5. NASA-supported research.

Astronomy and Astrophysics

Astronomy

20

Quasars, Radio Jets (Astronomy), Radio Sources (Astronomy), Astronomical Maps, Linear Polarization, Red Shift

Scientific paper

High-resolution VLA radio maps at 20 cm and 6 cm wavelengths of the quasar 4C 18.68 reveal an extended halo of about 20 arcsec containing complex curved structures extending east and west from the central source. The central source has a flat spectrum, while the spectrum generally steepens with distance from the center of the structure. The details of the structure and polarization of the emission suggest relativistic ejection in opposing directions by a precessing or rotating double jet with a period of about 50,000 years, consistent with the presence of two interacting massive bodies in the central source.

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