A Phylogenetic View Of The Eigenvector 1 Of Quasars
Date Issued
2016
Author(s)
Abstract
A cladistic analysis on samples of low-z quasars (z<0.7) separates sources radiating at higher Eddington ratios values, as well as radio-quiet from radio-loud quasars. The analysis properly distinguishes also core-dominated and lobe-dominated quasars, in agreement with the basic tenet of Unification schemes, and suggests a black hole mass threshold for powerful radio emission. Considering that the black hole mass then provides a sort of "arrow of time” of nuclear activity, an evolutionary interpretation becomes possible if cladistic trees are rooted on black hole mass. More massive radio-quiet Population B sources at low-z become a more evolved counterpart of Population A i.e., wind dominated sources, to which at least part of the “local” Narrow-Line Seyfert 1s belong. In this scheme, powerful radio-loud sources may be seen as sources belonging to a most evolved quasar population.
Coverage
Active Galactic Nuclei 12: A Multi-Messenger Perspective (AGN12)
Conferenece
Active Galactic Nuclei 12: A Multi-Messenger Perspective (AGN12)
Conferenece place
Napoli, Italy
Conferenece date
26-29 settembre, 2016
Ads BibCode
2016agnt.confE..67F
Rights
open.access
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agn12_marziani_poster.pdf
Description
poster
Size
5.71 MB
Format
Adobe PDF
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