Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.149..225v&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 149, no. 2, Nov. 1988, p. 225-231.
Astronomy and Astrophysics
Astrophysics
1
Elliptical Galaxies, Radio Galaxies, Three Dimensional Models, Galactic Nuclei, Luminosity, Particle Acceleration, Periodic Variations, Ram
Scientific paper
Recent observations of the longest known head-tail galaxy IC 711, at long wavelengths have shown it to extend farther than previously known. A theoretical simulation in 3 dimensions of the galaxy has been performed. Matching ram pressure theory and recent observations yields a primary fast decrease of the radio luminosity with time or distance from the optical nucleus of the galaxy, and a secondary periodic variation of the radio luminosity every 500 kpc. Near the end of the tail, a sudden and unpredicted flare-up of the observed width of the tail requires a sudden change in the jet's physical conditions about 2 Gyr earlier, or that of the surroundings. These simulations provide also some additional constraints on the ram pressure theory.
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