H II regions and radio visibility of quasar nuclei |
| |
| Authors: | L I Matveenko |
| |
| Institution: | (1) Space Research Institute, Russian Academy of Sciences, ul. Profsoyuznaya 84/32, Moscow, 117810, Russia |
| |
| Abstract: | The core (injector) and the jet (relativistic plasma outflow) of AGN objects are surrounded by an ionized medium, an H II region observed in emission lines. The synchrotron radiation from the core and the jet is observed through a thin screen that cocoons the structure under consideration. The screen transparency depends on wavelength and distance from the injector. We consider the objects 3C 345 and 1803+784 whose core emission at decimeter wavelengths is absorption by more than 25 dB. The visible bright compact component is the bright nearby portion of the jet that extends outside the dense part of the screen. We explore the possibility of measuring the screen transparency from absorption in Hα recombination lines with different quantum numbers at centimeter wavelengths. |
| |
| Keywords: | active galactic nuclei quasars and radio galaxies H II regions absorption recombination lines |
| 本文献已被 SpringerLink 等数据库收录！ |
|
