Flow dynamics and bending of wide-angle tailed radio sources

Details Flow dynamics and bending of wide-angle tailed radio sources Flow dynamics and bending of wide-angle tailed radio sources

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...408..428o&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 408, no. 2, p. 428-445.

Astronomy and Astrophysics

Astronomy

59

Galactic Radio Waves, Magnetohydrodynamic Flow, Radio Jets (Astronomy), Radio Sources (Astronomy), Very Large Array (Vla), Brightness Distribution, Spectral Energy Distribution, Stellar Models, Stellar Temperature

Scientific paper

The dynamics of tailed radio sources (WATs) is studied on the basis of VLA observations of 11 wide-angle WATs at 6 and 20 cm. These new images, in conjunction with optical and X-ray data, are used to describe the unifying characteristics of this class. WATs are found in centers of clusters without cooling cores, associated with galaxies of low space velocity. They are large sources, extending at least 50 kpc from the cluster center, and they have radio power close to the Fanaroff-Riley I/II break. The surface brightness and spectral distributions are used to model the flow fields and bending dynamics of the sources. Two limiting models are employed: the adiabatic model, in which no in situ energization takes place, and the kinetic model, in which all of the radio luminosity comes from in situ energization. It is found that the sources cannot be bent by the slow galaxy motion in the kinetic model. The sources can be bent by the ram pressure of a slowly moving central galaxy in the adiabatic model.

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