CCD Pictures of Peculiar Galaxies with Jets or Extensions

Astronomy and Astrophysics – Astrophysics

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Scientific paper

The phenomenon of "jets" seems to be rather universal in astrophysics. The astrophysical jets are seen in different wavelengths, from radio to X-rays. Their more general definitioni is "some emitting material weil collimated along a straight Or curved line". Such features appear on very different scales. Jets having a length of the order of a megaparsec and of a kiloparsec have been detected in different extragalactic systems, respectively aso (e. g. 4C18.68; Gower, Hutchings, Ap. J. 253, L1, 1982) and radio galaxies (e. g. PKS 0521-36; Danziger et al. MNRAS, 188,415, 1979). Jets of a few parsecs have also been suspected in galactic objects as the exotic SS 433, Sco X-1 and R Aquarii. Königl (Ap. J., 261, 115, 1982) even proposed to call jets the asymmetrical outflows which appear in the models of bipolar nebulae, bipolar CO emission lobes and aligned Herbig-Haro objects. Part of the galactic jets could be miniature models of some of the extragalactic ones.

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