Bibcode
Popović, L. Č.; Mediavilla, E. G.; Kubičela, A.; Jovanović, P.
Bibliographical reference
Astronomy and Astrophysics, v.390, p.473-480 (2002)
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8
2002
Journal
Citations
38
Refereed citations
27
Description
We have studied the Balmer line shapes of NGC 3516 in order to find the
structure of central Emission Line Region (ELR) and the physical
parameters of the emitting plasma. The shapes of these broad emission
lines show evidences of a multicomponent origin and also features which
could be identified as the peaks of a rotating disc. We have proposed a
two component Broad Line Region (BLR) model consisting of an inner
Keplerian relativistic disc and an outer structure surrounding the disc
which is composed by Broad Line and Narrow Line Regions (BLR and NLR).
Adopting a mass of ~ 4 x 107 Msun for the central
object we found that the emitting disc is located from 0.004 pc to 0.018
pc. Using a well known method for laboratory plasma diagnostic, the
Boltzmann plot, we estimated the electron temperature (~12 500 K) and
electron density ( ~ 1015 cm-3) of the disc and
the surrounding region (Te~ 20 000 K and Ne ~
1015 cm-3).