2019A&A...627A..88M


Query : 2019A&A...627A..88M

2019A&A...627A..88M - Astronomy and Astrophysics, volume 627A, 88-88 (2019/7-1)

Black hole mass estimates in quasars. A comparative analysis of high- and low-ionization lines.

MARZIANI P., DEL OLMO A., MARTINEZ-CARBALLO M.A., MARTINEZ-ALDAMA M.L., STIRPE G.M., NEGRETE C.A., DULTZIN D., D'ONOFRIO M., BON E. and BON N.

Abstract (from CDS):

Context. The inter-line comparison between high- and low-ionization emission lines has yielded a wealth of information on the structure and dynamics of the quasar broad line region (BLR), including perhaps the earliest unambiguous evidence in favor of a disk + wind structure in radio-quiet quasars. Aims. We carried out an analysis of the CIVλ1549 and Hβ line profiles of 28 Hamburg-ESO high-luminosity quasars and of 48 low-z, low-luminosity sources in order to test whether the width of the high-ionization line CIVλ1549 could be correlated with Hβ and be used as a virial broadening estimator. Methods. We analyze intermediate- to high-S/N, moderate-resolution optical and near-infrared (NIR) spectra covering the redshifted CIVλ1549 and Hβ over a broad range of luminosity log L∼44-48.5[erg/s] and redshift (0-3), following an approach based on the quasar main sequence. Results. The present analysis indicates that the line width of CIVλ1549 is not immediately offering a virial broadening estimator equivalent to Hβ. At the same time a virialized part of the BLR appears to be preserved even at the highest luminosities. We suggest a correction to FWHM(CIVλ1549) for Eddington ratio (using the CIVλ1549 blueshift as a proxy) and luminosity effects that can be applied over more than four dex in luminosity. Conclusions. Great care should be used in estimating high-L black hole masses MBH from CIVλ1549 line width. However, once a corrected FWHM CIVλ1549 is used, a CIVλ1549-based scaling law can yield unbiased MBH values with respect to the ones based on Hβ with sample standard deviation ~=0.3dex.

Abstract Copyright: © ESO 2019

Journal keyword(s): quasars: general - quasars: emission lines - quasars: supermassive black holes - line: profiles - ISM: jets and outflows

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 Mrk 1502 Sy1 00 53 34.9331107632 +12 41 35.929269132   14.41 14.03     ~ 1169 1
2 QSO B0109-353 QSO 01 11 43.6321128912 -35 03 00.587535660   16.6 16.9     ~ 77 0
3 NGC 4253 Sy1 12 18 26.5163572920 +29 48 46.531535472   14.34 13.57     ~ 1042 1
4 NGC 4395 Sy2 12 25 48.8633109888 +33 32 48.700168152 10.84 10.54 10.11 9.98   ~ 1185 1
5 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2716 0
6 [VV2000] J220529.9-254222 QSO 22 05 29.8009845720 -25 42 23.062305384     17.30     ~ 13 0
7 QSO B2355-463 QSO 23 58 09.2265434448 -46 05 00.859844256   16.9 16.9     ~ 10 0

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