Confining hot spots in 3C 196 - Implications for QSO-companion galaxies

Details Confining hot spots in 3C 196 - Implications for QSO-companion galaxies Confining hot spots in 3C 196 - Implications for QSO-companion galaxies

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...306..107b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 306, July 1, 1986, p. 107-109.

Astronomy and Astrophysics

Astrophysics

9

Galactic Structure, Mass Distribution, Quasars, Spectral Energy Distribution, Stellar Evolution, Temperature Distribution, Emission Spectra, Galactic Mass, Radio Spectra, Red Shift, Very Long Base Interferometry

Scientific paper

VLBI observations of the extremely compact hot spot in the northern radio lobe of the QSO 3C 196 reveal the angular size of its smallest substructure to be 0.065 arcsec x 0.045 arcsec or about 300 pc at the redshift distance. The morphology of the hot spot and its orientation relative to the more diffuse radio emission suggest that it is formed by an oblique interaction between the nuclear QSO jet and circum-QSO cloud. The inferred density in this cloud, together with its apparent size, imply that the cloud contains a galactic mass, greater than a billion solar masses of gas. The effect of the jet will be to hasten gravitational collapse of the cloud. If many QSOs such as 3C 196 are formed or found in gas-rich environments, the QSO radio phase may commonly stimulate the metamorphosis of circum-QSO gas to QSO-companion galaxies or it may play a significant part in catalyzing star formation in existing companions.

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