J/ApJ/903/86 Properties of 68 active galactic nuclei (Martinez-Aldama+, 2020)
Scatter Analysis along the Multidimensional Radius-Luminosity Relations for
Reverberation-mapped Mg.
Martinez-Aldama, Martinez-Aldama M.L., Zajacek M., Czerny B., Panda S.
<Astrophys. J., 903, 86 (2020)>
=2020ApJ...903...86M 2020ApJ...903...86M
ADC_Keywords: Active gal. nuclei; Black holes; Ultraviolet
Keywords: Active galaxies ; Supermassive black holes
Abstract:
The usage of the radius-luminosity (R-L) relation for the
determination of black hole masses across the cosmic history, as well
as its application for cosmological studies, motivates us to analyze
its scatter, which has recently increased significantly for both the
optical (Hβ) and UV (MgII) lines. To this purpose, we determined
the scatter along the R-L relation for an up- to-date
reverberation-mapped MgII sample. Studying linear combinations of the
luminosity at 3000Å with independent parameters such as the FWHM,
the UV FeII strength (R FeII ), and the fractional variability (F var)
for the whole sample, we get only a small decrease in the scatter
(σrms=0.29-0.30dex). Linear combinations with the
dimensionless accretion rate (M) and the Eddington ratio lead to
significant reductions of the scatter (σrms∼0.1dex), albeit
both suffering from the interdependency on the observed time delay.
After the division into two subsamples considering the median value of
the M in the full sample, we find that the scatter decreases
significantly for the highly accreting subsample. In particular, the
smallest scatter of σrms=0.17dex is associated with the
independent parameter R FeII, followed by the combination with F var
with σrms=0.19dex. Both of these independent observationally
inferred parameters are in turn correlated with M and Lbol/LEdd.
These results suggest that the large scatter along the R-L relation is
driven mainly by the accretion rate intensity.
Description:
Using a sample of 68 reverberation-mapped MgII Active Galactic Nuclei
(AGNs), we explore the reasons for the scatter along the R-L
relation. The luminosity at 3000Å, FWHM, and equivalent width (EW)
of MgII and FeII (at 2250-2650Å) were taken from the
Shen+, 2019, J/ApJS/241/34.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb1.dat 118 68 Observational properties for the full sample
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See also:
J/MNRAS/268/305 : Variability of optically selected quasars (Hook+ 1994)
J/ApJ/633/638 : Variable quasar sample from SDSS (Wilhite+, 2005)
J/ApJ/698/895 : Variations in QSOs optical flux (Kelly+, 2009)
J/ApJ/699/800 : Mass functions of active black holes (Vestergaard+, 2009)
J/ApJ/736/86 : FeII emission in SDSS type 1 AGNs (Dong+, 2011)
J/ApJ/782/45 : SEAMBHs. I. Mrk 142, Mrk 335, and IRAS F12397+3333 (Du+, 2014)
J/ApJ/793/108 : SEAMBHs. II. Continuum and Hbeta LCs (Wang+, 2014)
J/ApJ/806/22 : SEAMBHs IV. Hβ time lags (Du+, 2015)
J/ApJ/825/126 : SEAMBHs. V. The third year (Du+, 2016)
J/ApJ/851/21 : SDSS RM project first year of observations (Grier+, 2017)
J/ApJ/856/6 : SEAMBHs IX. 10 new Hβ light curves (Du+, 2018)
J/ApJ/865/56 : Emission line & R-band continuum LCs of 17 QSOs (Lira+, 2018)
J/ApJ/880/46 : Spectroscopy & V-band monitoring of CTS C30.10 (Czerny+, 2019)
J/ApJ/886/42 : Reverberation mapping & opt. spectra data of AGNs (Du+, 2019)
Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1 I1 --- Sample [1/2] Sample code (1)
3- 14 A12 --- ID Object identifier
16- 19 F4.1 [10-7W] L3000 [42.8/46.8] log continuum luminosity at
3000Å; erg/s
21- 26 F6.4 [10-7W] e_L3000 [0.0002/0.2] Uncertainty in logL3000
28- 32 F5.1 d tau [5.3/564] Time delay (2)
34- 38 F5.1 d E_tau [1.7/109] Upper uncertainty in tau
40- 44 F5.1 d e_tau [1.8/114] Lower uncertainty in tau
46- 50 I5 km/s FWHM [2214/10594] MgII line width; Full-Width
Half-Maximum
52- 55 I4 km/s e_FWHM [14/2835] Uncertainty in FWHM
57- 62 F6.3 [-] Mdot [-2.08/2.52] log dimensionless accretion rate
64- 68 F5.3 [-] E_Mdot [0.2/1.3] Upper uncertainty in logMdot
70- 74 F5.3 [-] e_Mdot [0.2/1.3] Lower uncertainty in logMdot
76- 80 F5.3 --- Lb/LE [0.004/5.4] Eddington ratio
82- 86 F5.3 --- E_Lb/LE [0.003/3.1] Upper uncertainty in Lb/LE
88- 92 F5.3 --- e_Lb/LE [0.002/4.2] Lower uncertainty in Lb/LE
94- 98 F5.3 --- RFeII [0.1/2.35]? The FeII strength
100-104 F5.3 --- E_RFeII [0.005/0.005]? Upper uncertainty in RFeII
106-110 F5.3 --- e_RFeII [0.003/0.4]? Lower uncertainty in RFeII
112-116 F5.3 --- Fvar [0.03/0.53] Fractional variability
118 I1 --- Class [1/2] Classification (3)
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Note (1): Code as follows:
1 = SDSS-RM sample, each number corresponds to the RMID number in the
original catalog (Homayouni+, 2020ApJ...901...55H 2020ApJ...901...55H).
2 = Zajacek+, 2020ApJ...896..146Z 2020ApJ...896..146Z.
Note (2): SDSS-RM time delay reported correspond to ones obtained with
the JAVELIN method.
Note (3): Class as follows:
1 = the low accretion rate sub-sample,
2 = the high accretion rate sub-sampe.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 31-Jan-2022