UV spectral diagnostics for low redshift quasars: Estimating physical conditions and radius of the broad line region

DOI: 
10.1007/s10509-014-2136-z
Publication date: 
01/04/2015
Main author: 
Marziani P.
IAA authors: 
Sulentic J.W.;Del Olmo A.;Martínez Carballo M.A.
Authors: 
Marziani P., Sulentic J.W., Negrete C.A., Dultzin D., Del Olmo A., Martínez Carballo M.A., Zwitter T., Bachev R.
Journal: 
Astrophysics and Space Science
Publication type: 
Article
Volume: 
356
Pages: 
339-346
Number: 
Abstract: 
The UV spectral range (1100–3000 Å) contains the strongest resonance lines observed in active galactic nuclei (AGN). Analysis of UV line intensity ratios and profile shapes in quasar spectra provide diagnostics of physical and dynamical conditions in the broad line emitting region. This paper discusses properties of UV lines in type-1 AGN spectra, and how they lead an estimate of ionizing photon flux, chemical abundances, radius of the broad line emitting region and central black hole mass. These estimates are meaningfully contextualised through the 4D “eigenvector-1” (4DE1) formalism. © 2014, Springer Science+Business Media Dordrecht.
Database: 
WOK
SCOPUS
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/2015Ap&SS.356..339M/abstract
ADS Bibcode: 
2015Ap&SS.356..339M
Keywords: 
Astronomical databases: surveys; Galaxies: active; Quasars: emission lines; Quasars: general; Techniques: spectroscopic