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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28508
Title: A main sequence for quasars
Authors: MARZIANI, Paola 
Dultzin, Deborah
Sulentic, Jack W.
Del Olmo, Ascensión
Negrete, C. A.
Martínez-Aldama, Mary L.
D'ONOFRIO, MAURO
Bon, Edi
Bon, Natasa
STIRPE, Giovanna Maria 
Issue Date: 2018
Journal: FRONTIERS IN ASTRONOMY AND SPACE SCIENCES 
Number: 5
First Page: 6
Abstract: The last 25 years saw a major step forward in the analysis of optical and UV spectroscopic data of large quasar samples. Multivariate statistical approaches have led to the definition of systematic trends in observational properties that are the basis of physical and dynamical modeling of quasar structure. We discuss the empirical correlates of the so-called “main sequence” associated with the quasar Eigenvector 1, its governing physical parameters and several implications on our view of the quasar structure, as well as some luminosity effects associated with the virialized component of the line emitting regions. We also briefly discuss quasars in a segment of the main sequence that includes the strongest FeII emitters. These sources show a small dispersion around a well-defined Eddington ratio value, a property which makes them potential Eddington standard candles.
URI: http://hdl.handle.net/20.500.12386/28508
URL: https://www.frontiersin.org/articles/10.3389/fspas.2018.00006/full
https://arxiv.org/pdf/1802.05575.pdf
ISSN: 2296-987X
DOI: 10.3389/fspas.2018.00006
Bibcode ADS: 2018FrASS...5....6M
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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