DOI:
10.1051/0004-6361/201630309
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
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.
URL:
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85038619089&doi=10.1051%2f0004-6361%2f201630309&partnerID=40&md5=a8ea413e6b21a5390125b3259776a221
Keywords:
Quasars: Emission lines; Quasars: General; Quasars: Supermassive black holes