The most powerful quasar outflows as revealed by the Civ λ 1549 resonance line

DOI: 
10.1007/s10509-015-2611-1
Publication date: 
01/01/2016
Main author: 
Marziani P.
IAA authors: 
Martínez Carballo;Sulentic;Del Olmo
Authors: 
Marziani P., Martínez Carballo M.A., Sulentic J.W., Del Olmo A., Stirpe G.M., Dultzin D.
Journal: 
Astrophysics and Space Science
Publication type: 
Article
Volume: 
361
Pages: 
1-11
Number: 
29
Abstract: 
Outflows from quasars may be almost ubiquitous, but there are significant differences on a source- by-source basis. These differences can be organized along the 4D Eigenvector 1 sequence: at low z, only the Population A sources radiating at relatively high Eddington ratio show evidences of prominent high- velocity outflows from the Civλ$\lambda$1549 line profiles. Here we discuss, starting from recent observations of high-luminosity sample of Hamburg-ESO quasars, the Civλ$\lambda$1549 emission line profiles and how they are affected by outflow motion as a function of the quasar luminosity. Our high-luminosity sample has the notable advantage that the rest frame has been set by previous Hβ$\beta$ observations in the J, H, and K band, therefore making measurements of inter-line shift accurate and free of systemic biases. As the redshift increases and the luminosity of the brightest quasars grows, powerful, high-velocity outflows may become more frequent. We then discuss the outflow contextualisation following the 4DE1 approach as a tool for unveiling the nature of the so-called Weak Lined Quasars (WLQs) that have emerged in recent years as a new, poorly understood class of quasars. We estimate the kinetic power associated with the Civλ$\lambda$1549 emitting gas in outflow, and we suggest that the host galaxies of the most luminous sources may experience a significant feedback effect. © 2015, Springer Science+Business Media Dordrecht.
Database: 
WOK
SCOPUS
ADS
SCOPUS
URL: 
https://ui.adsabs.harvard.edu/#abs/2016Ap&SS.361...29M/abstract
ADS Bibcode: 
2016Ap&SS.361...29M
Keywords: 
Galaxies: active; Quasars: emission lines; Quasars: general