2006A&A...456..929S


Query : 2006A&A...456..929S

2006A&A...456..929S - Astronomy and Astrophysics, volume 456, 929-939 (2006/9-4)

VLT/ISAAC spectra of the Hβ region in intermediate-redshift quasars. II. Black hole mass and Eddington ratio.

SULENTIC J.W., REPETTO P., STIRPE G.M., MARZIANI P., DULTZIN-HACYAN D. and CALVANI M.

Abstract (from CDS):

We derive black hole masses for a sample of about 300 AGNs in the redshift range 0<z<2.5. We use the same virial velocity measure (FWHM HβBC) for all sources which represents a significant improvement over previous studies. We review methods and caveats for determining AGN black hole masses via the virial assumption for motions in the gas producing low ionization broad emission lines. We derive a corrected FWHM(HβBC) measure for the broad component of Hβ that better estimates the virialized line emitting component by comparing our FWHM measures with a sample of reverberated sources with Hβ radial velocity dispersion measures. We also consider the FWHM of the FeIIλ4570 blend as a potential alternative velocity estimator. We find a range of black hole mass between logMBH∼6.0-10.0, where MBH is in solar masses. Estimates using corrected FWHM(Hβ), as well as FWHM(FeII) measures, reduce the number of sources with log MBH>9.5 and suggest that extremely large MBH values (logMBH>10) may not be realistic. Derived L/LEdd values show no evidence for a significant population of super-Eddington radiators especially after correction is made for sources with extreme orientation to our line of sight. Sources with FWHM(HβBC)≲4000km/s show systematically higher L/LEdd and lower MBH values than broader lined AGNs (including almost all radio-loud sources).

Abstract Copyright:

Journal keyword(s): galaxies: quasars: emission lines - galaxies: quasars: general - line: profiles - black hole physics

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 [VV2000] J025055.4-361636 QSO 02 50 55.3418030448 -36 16 35.794668072   16.58 16.20 16.3   ~ 25 0
2 QSO J0509-3232 QSO 05 09 17.7958424520 -32 32 45.311579772     17.4     ~ 10 0
3 QSO B0512-3329 QSO 05 14 10.91 -33 26 22.4     17.0     ~ 56 0
4 IRAS 07598+6508 Sy1 08 04 30.4643108040 +64 59 52.789588188   14.3 15.5     ~ 224 0
5 QSO B0926-0201 QSO 09 29 13.5729514728 -02 14 46.227751332   16.59 16.31     ~ 19 0
6 QSO J0949-0514 QSO 09 49 30.3064614840 -05 14 54.533410152     16.50     ~ 13 0
7 QSO J1005+0134 QSO 10 05 35.2474303944 +01 34 45.713350380   17.21 16.89     ~ 48 0
8 LBQS 1017-0009 QSO 10 19 56.7596663760 -00 24 09.875270808   16.82 16.36     ~ 18 0
9 QSO B1104-181 QSO 11 06 33.3845199936 -18 21 23.829049296   15.8 15.9 15.7   ~ 314 1
10 QSO B1249-06 QSO 12 51 56.3951819688 -07 05 01.262804244     16.87     ~ 7 0
11 Mrk 235 bCG 13 00 02.1313424472 +33 26 14.870180040   15       ~ 32 0
12 [VV96] J130100.0-083935 QSO 13 00 59.9510638416 -08 39 34.550000964     16.4     ~ 8 0
13 QSO B2355-463 QSO 23 58 09.2265434448 -46 05 00.859844256   16.9 16.9     ~ 10 0

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2022.10.01-10:02:48

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