Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.239p...1r&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 239, July 15, 1989, p. 1P-4P.
Astronomy and Astrophysics
Astronomy
205
Astronomical Models, Galactic Evolution, Radio Galaxies, Radio Spectra, Star Formation, Galactic Nuclei, Red Shift, Temperature, Visible Spectrum
Scientific paper
A young galaxy would contain clouds or filaments with T of less than about 10,000 K in pressure balance with a medium at T of greater than about 10 to the 6th K. When activity in its nucleus turns such a galaxy into a strong radio source, shocks propagate through this two-phase gas, inflating radio lobes filled with relativistic plasma. The shocks expel the hot-phase gas, but leave the clouds within the lobes where they are squeezed by the higher pressure. This compression pushes many clouds over the threshold for gravitational instability, thereby triggering a burst of star formation. This process may account for the recently discovered alignment of optical and radio structure in high-z radio galaxies.
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