dc.contributor.author |
Krishan, V |
|
dc.contributor.author |
Wiita, P. J |
|
dc.date.accessioned |
2008-09-15T14:47:46Z |
|
dc.date.available |
2008-09-15T14:47:46Z |
|
dc.date.issued |
1990-10 |
|
dc.identifier.citation |
Monthly Notices of Royal Astronomical Society, Vol. 246, No. 4, pp. 597 - 607 |
en |
dc.identifier.issn |
0035-8711 |
|
dc.identifier.uri |
http://hdl.handle.net/2248/3627 |
|
dc.description.abstract |
Stimulated Raman scattering processes appear to be able to produce the typical electromagnetic continuum of an active galactic nucleus (AGN). Seed photons beat through Raman forward-scattering to create Langmuir plasma waves which can quickly accelerate electrons to Lorentz factors of 10^3^ to 10^4^. These electrons radiate their energy through Raman back- scattering off magnetic fields engendered by magnetic modulational instabilities afflicting the Langmuir waves. The frequency of emission is proportional to the square root of the ambient density, so γ-rays can be produced in the highest density regions near the central engine, with X-rays through to IR photons produced at greater distances. Both the high luminosity and broken power-law continuum characteristic of an AGN emerge from reasonable density distributions. Bremsstrahlung emission in the UV is a by-product of this mechanism and could explain the 'blue bump'. Because the electrons are continuously accelerated in this picture, a steady-state distribution arises naturally and a simple relation exists between the density of the relativistic particles which emit the radiation and the ambient plasma density which is involved in the acceleration. |
en |
dc.language.iso |
en |
en |
dc.publisher |
Royal Astronomical Society |
en |
dc.relation.uri |
http://ads.iucaa.ernet.in/abs/1990MNRAS.246..597K |
en |
dc.subject |
Plasma Processes |
en |
dc.subject |
Emission in Galactic Nuclei |
en |
dc.title |
Coherent Plasma Processes and the Continuum Emission in Active Galactic Nuclei |
en |
dc.type |
Article |
en |