Multifrequency observations of extended radio galaxies. IV - The large radio jet galaxy 4 CT 74.17.1

Details Multifrequency observations of extended radio galaxies. IV - The large radio jet galaxy 4 CT 74.17.1 Multifrequency observations of extended radio galaxies. IV - The large radio jet galaxy 4 CT 74.17.1

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....96..332v&link_type=abstract

Astronomy and Astrophysics, vol. 96, no. 1-2, Mar. 1981, p. 332-344. Research supported by the Nederlandse Organisatie voor Zui

Astronomy and Astrophysics

Astronomy

29

Centimeter Waves, Galactic Structure, Polarized Electromagnetic Radiation, Radio Galaxies, Radio Jets (Astronomy), Astronomical Maps, Cosmic Gases, Electron Density Profiles, Galactic Radiation, Halos, Jet Flow, Radiant Flux Density, Velocity Distribution

Scientific paper

Total intensity and polarization data (49 cm, 21 cm, and 6 cm) of the radio galaxy 4 CT 74.17.1 are discussed. It is noted that the source has a one-sided jet approximately 160 kpc long with a pronounced wiggle. From the polarization data it is found that the magnetic field is directed along the jet over its entire length. The optical field along the jet including a close pair of galaxies, one of which is responsible for the radio emission, is mapped in the blue. It is noted that if the assumption is made that a gaseous halo is likely to surround the pair of very bright galaxies associated with CT 74.17.1, then the radio jet can be used to study its physical conditions. To illustrate this a simple model is assumed and an estimate is made of the temperature for the halo gas of approximately 6 x 10 to the 7th K and of a gas density which is an order of magnitude lower than the gas density internal to the radio source at equivalent locations.

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