What does C IV λ 1549 tell us about the physical driver of the Eigenvector quasar sequence?

DOI: 
10.1051/0004-6361/201630309
Publication date: 
01/12/2017
Main author: 
Sulentic J.W.
IAA authors: 
Sulentic, J.W.;Del Olmo, A.;Martínez-Carballo, M.A.;Perea, J.;Martínez-Aldama, M.L.
Authors: 
Sulentic J.W., Del Olmo A., Marziani P., Martínez-Carballo M.A., D'onofrio M., Dultzin D., Perea J., Martínez-Aldama M.L., Negrete C.A., Stirpe G.M., Zamfir S.
Journal: 
Astronomy and Astrophysics
Refereed: 
Yes
Publication type: 
Article
Volume: 
608
Pages: 
A122
Number: 
A122
Abstract: 
Broad emission lines in quasars enable us to 'resolve' structure and kinematics of the broad-line emitting region (BLR) thought to involve an accretion disk feeding a supermassive black hole. Interpretation of broad line measures within the 4DE1 formalism simplifies the apparent confusion among such data by contrasting and unifying properties of so-called high and low accreting Population A and B sources. Hβ serves as an estimator of black hole mass, Eddington ratio and source rest frame; the latter being a valuable input for Civλ1549 studies which allow us to isolate the blueshifted wind component. Optical and HST-UV spectra yield Hβ and Civλ1549 spectra for low-luminosity sources while VLT-ISAAC and FORS and TNG-LRS provide spectra for high-luminosity sources. New high-S/N data for Civ in high-luminosity quasars are presented here for comparison with the other previously published data. Comparison of Hβ and Civλ1549 profile widths/shifts indicates that much of the emission from the two lines arise in regions with different structure and kinematics. Covering a wide range of luminosity and redshift shows evidence for a correlation between Civλ1549 blueshift and source Eddington ratio, with a weaker trend with source luminosity (similar amplitude outflows are seen over four of the five dex luminosity ranges in our combined samples). At low luminosity (z ≲ 0.7) only Population A sources show evidence for a significant outflow while at high luminosity the outflow signature begins to appear in Population B quasars as well. © ESO, 2017.
Database: 
ADS
SCOPUS
URL: 
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85038619089&doi=10.1051%2f0004-6361%2f201630309&partnerID=40&md5=a8ea413e6b21a5390125b3259776a221
ADS Bibcode: 
2017A&A...608A.122S
Keywords: 
Quasars: Emission lines; Quasars: General; Quasars: Supermassive black holes