Beams in head-tail galaxies

Details Beams in head-tail galaxies Beams in head-tail galaxies

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...143..136b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 143, no. 1, Feb. 1985, p. 136-142.

Astronomy and Astrophysics

Astronomy

12

Beam Interactions, Galactic Radio Waves, Hydrodynamic Ram Effect, Radio Sources (Astronomy), Intergalactic Media, Interstellar Matter, Turbulence

Scientific paper

The beam shapes of the head-tail galaxies NGC 1265, IC 708, and 1638 + 538 have been modeled using ram pressure bending of continuous beams. Free parameters for the models are a general scaling parameter, which contains the ratio of the beam velocity and the galaxy velocity, and the injection angle of the beam relative to the galaxy velocity. The outer beams of NGC 1265 bend faster than the inner beams, which has been characterized with an increase in the effective bending force as the beams emerge from the protective ISM into the ICM. The rapid widening of the beams in NGC 1265 and 1638 + 538 has been interpreted fluid-dynamically as stagnation of the turbulent beam flow. Other characteristics which are consistent with this interpretation, are the turnover distance, the approximate beam velocity to galaxy velocity ratio, and the opening angle of the widened region.

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