NDLI: H II regions and radio visibility of quasar nuclei

Content Provider	Springer Nature Link
Author	Matveenko, L. I.
Copyright Year	2001
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.
Starting Page	686
Ending Page	690
Page Count	5
File Format	PDF
ISSN	10637737
Journal	Astronomy Letters
Volume Number	27
Issue Number	11
e-ISSN	15626873
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2001-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	active galactic nuclei quasars and radio galaxies H II regions absorption recombination lines Astronomy Astrophysics
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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H II regions and radio visibility of quasar nuclei