Bibcode
Acosta Pulido, J.; Perez-Fournon, I.; Calvani, Massimo; Wilson, A. S.
Referencia bibliográfica
In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 2: AGN and the X Ray Background p 877-881 (SEE N90-25841 19-89)
Fecha de publicación:
11
1989
Número de citas
0
Número de citas referidas
0
Descripción
The regions of high excitation gas detected around various Active
Galactic Nuclei (AGN) are examined. The radiation emitted by the nucleus
may be responsible for the high ionization of the line emitting gas.
Evidence that the radiation field is anisotropic and collimated in a
direction close to the cone axis is found. The possibility that a
geometrically thick accretion disk is the source of the ionizing
continuum is considered. Theoretical predictions and observational data
are compared. The energetics requirements and the spatial distribution
of the extended emitting gas for Seyfert and radio galaxies are
analyzed.