Seyfert galaxies with linear nuclear radio structures have been studied with long-slit spectroscopy. Very extended, narrow [OIll] emission is detected in several of the objects, highly elongated along the radio source axis. This Extended Narrow Line Region would be consistent with interstellar gas that is photoionized by collimated energetic radiation from the nucleus. Within the Narrow Line Region detailed correspondences between [Olll] emission features and individual radio components have been found in a number of Seyfert galaxies. Velocities and positions of these [OIll] features suggest that they may be produced when ambient gas has been compressed by an outmoving radio component, subsequently cools down behind the bow shock and then is photoionized by the nuclear continuum source.
Príspevok prináša niekol'ko námetov na realizáciu experimentálnych aktivít z tematických oblastí Svetlo (ISCED - International Standard Classification of Education) a Elektromagnetické žiarenia a častice mikrosveta (ISCED 3). Ku každej aktivite sú doplnené metodické poznámky a návrhy na ich použitie vo vyučovacom procese s dôrazom na súvis medzi skúmanými fyzikálnymi javmi a situáciami z bežného života. Experimenty sú určené najmä pre žiakov a učitelov nižšieho a vyššieho sekundárneho vzdelávania, ale je možné ich využívat aj pri metodickej príprave budúcich učitel'ov fyziky., The paper proposes a few experimental activities belonging to the topics Light (ISCED 2 – International Standard Clasification of Education) and Electromagnetic radiation and the particles of microworld (ISCED 3). Each activity is complemented by methodological remarks and proposals for the use in teaching. Emphasis is put on the connection between explored effects and real life situations. Experiments are designed for pupils and teachers of the lower and upper secondary education but can be used within the training of prospective teachers as well., Martin Hruška, Miriam Spodniaková Pfefferová, Stanislav Holec., and Obsahuje seznam literatury