J/ApJ/903/112 SDSS Hbeta & CIV reverberation mapped AGNs (Dalla Bonta+, 2020)
The Sloan Digital Sky Survey Reverberation Mapping Project: Estimating Masses of
Black Holes in Quasars with Single-epoch Spectroscopy.
Dalla Bonta E.D., Peterson B.M., Bentz M.C., Brandt W.N., Ciroi S.,
De Rosa G., Alvarez G.F., Grier C.J., Hall P.B., Hernandez Santisteban J.V.,
Ho L.C., Homayouni Y., Horne K., Kochanek C.S., Li J.I.-H., Morelli L.,
Pizzella A., Pogge R.W., Schneider D.P., Shen Y., Trump J.R., Vestergaard M.
<Astrophys. J., 903, 112 (2020)>
=2020ApJ...903..112D 2020ApJ...903..112D
ADC_Keywords: Active gal. nuclei; QSOs; Black holes; Optical; Ultraviolet;
Redshifts
Keywords: Active galactic nuclei ; Quasars ; Supermassive black holes
Abstract:
It is well known that reverberation mapping of active galactic nuclei
(AGNs) reveals a relationship between AGN luminosity and the size of
the broad-line region, and that use of this relationship, combined
with the Doppler width of the broad emission line, enables an estimate
of the mass of the black hole at the center of the active nucleus
based on a single spectrum. An unresolved key issue is the choice of
parameter used to characterize the line width, either FWHM or line
dispersion σline (the square root of the second moment of the
line profile). We argue here that use of FWHM introduces a bias,
stretching the mass scale such that high masses are overestimated and
low masses are underestimated. Here we investigate estimation of black
hole masses in AGNs based on individual or "single-epoch"
observations, with a particular emphasis in comparing mass estimates
based on line dispersion and FWHM. We confirm the recent findings
that, in addition to luminosity and line width, a third parameter is
required to obtain accurate masses, and that parameter seems to be
Eddington ratio. We present simplified empirical formulae for
estimating black hole masses from the Hβ λ4861 and CIV
λ1549 emission lines. While the AGN continuum luminosity at
5100Å is usually used to predict the Hβ reverberation lag, we
show that the luminosity of the Hβ broad component can be used
instead without any loss of precision, thus eliminating the difficulty
of accurately accounting for the host-galaxy contribution to the
observed luminosity.
Description:
We use both Hβ and CIV data from the 2014-2018 SDSS-RM campaign
(Grier+, 2017, J/ApJ/851/21 and 2019, J/ApJ/887/38 ;
Shen+, 2019, J/ApJS/241/34).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea3.dat 87 32 Reverberation-mapped AGNs (SDSS Hβ)
tablea4.dat 71 45 Reverberation-mapped AGNs (SDSS CIV)
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See also:
J/ApJS/115/185 : 3C 390.3 BVRI and H photometry (Dietrich+, 1998)
J/ApJ/510/659 : Size and Structure of AGN in NGC 5548 (Peterson+, 1999)
J/A+A/369/57 : Monitoring Mkn279 BVRI & Hβ fluxes (Santos-Lleo+, 2001)
J/ApJ/613/682 : AGN central masses & broad-line region sizes (Peterson+, 2004)
J/ApJ/632/799 : NGC4395 light curves (Peterson+, 2005)
J/ApJ/667/131 : Mass function of active black holes (Greene+, 2007)
J/ApJ/666/757 : CIV 1549Å emission line in AGNs (Sulentic+, 2007)
J/AJ/135/928 : The black hole-bulge relationship (Shen+, 2008)
J/ApJ/680/169 : SDSS DR5 virial black hole masses (Shen+, 2008)
J/ApJ/702/1353 : Hβ and V-band light curves of NGC 4051 (Denney+, 2009)
J/ApJ/716/993 : LAMP: reverberation mapping of H and He lines (Bentz+, 2010)
J/MNRAS/410/860 : Redshift dependence of BAL QSOs (Allen+, 2011)
J/MNRAS/426/416 : Mrk6 Hα, Hβ & Hγ spectra (Doroshenko+, 2012)
J/ApJ/755/60 : Reverberation mapping for 5 Seyfert 1 galaxies (Grier+, 2012)
J/ApJ/746/169 : Luminosity function of broad-line quasars (Shen+, 2012)
J/ApJ/753/125 : Near-IR spectroscopy follow-up 60 SDSS-DR7 QSOs (Shen+, 2012)
J/ApJ/779/109 : Long-term monitoring of NGC 5548 (Peterson+, 2013)
J/ApJ/782/45 : SEAMBHs. I. Mrk 142, Mrk 335, and IRAS F12397+3333 (Du+, 2014)
J/ApJ/795/149 : Reverberation mapping of Seyfert 1 NGC 7469 (Peterson+, 2014)
J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)
J/ApJS/217/26 : Lick AGN monitoring 2011: light curves (Barth+, 2015)
J/MNRAS/454/3864 : Orientation & QSO black hole mass estimat (Brotherton+ 2015)
J/ApJ/806/128 : Space telescope RM project. I. NGC5548 (De Rosa+, 2015)
J/ApJ/806/129 : Space telescope RM project. II. Swift data (Edelson+, 2015)
J/ApJS/216/4 : SDSS-RM project: technical overview (Shen+, 2015)
J/ApJ/804/L15 : SDSS-DR7 broad-line QSOs (Sun+, 2015)
J/ApJ/825/126 : SEAMBHs. V. The third year (Du+, 2016)
J/ApJ/821/56 : Space telescope RM project III. NGC5548 LCs (Fausnaugh+, 2016)
J/ApJ/827/118 : A new reverberation mapping campaign on NGC 5548 (Lu+, 2016)
J/ApJ/817/55 : NIR spectroscopy of 1.5<z<3.5 broad-band QSOs (Shen, 2016)
J/ApJ/818/30 : Lag measurements for 15z<0.8 QSOs from SDSS-RM (Shen+, 2016)
J/A+A/603/A1 : X-shooter spectra of 6 ∼2.2 quasars (Bisogni+, 2017)
J/MNRAS/465/2120 : Correcting CIV-based virial black hole mass (Coatman+, 2017)
J/ApJ/840/41 : X-ray/UV Swift monitoring of NGC 4151 (Edelson+, 2017)
J/ApJ/840/97 : Opt reverberation mapping campaign 5 AGNs (Fausnaugh+, 2017)
J/ApJ/851/21 : SDSS RM project first year of observations (Grier+, 2017)
J/ApJ/837/131 : Space tel RM project V. NGC5548 sp. monitoring (Pei+, 2017)
J/A+A/608/A122 : Spectra of 28 intermediate redshift quasars (Sulentic+, 2017)
J/MNRAS/474/339 : Photometric analysis of Abell 1689 (Dalla Bonta+, 2018)
J/ApJ/866/133 : Continuum-Hβ light curves of 5 Seyfert 1 (De Rosa+, 2018)
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/885/161 : 90 cepheid candidates nearby NGC 6814 (Bentz+, 2019)
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)
J/ApJ/870/123 : Swift optical & UV flux of four AGNs (Edelson+, 2019)
J/ApJ/887/38 : SDSS RM Project: CIV lags & LCs from 4yrs data (Grier+, 2019)
J/ApJS/241/34 : The SDSS Reverberation Mapping (SDSS-RM) project (Shen+, 2019)
J/ApJ/882/4 : SDSS-RM project: Hα, Hβ & MgII lines (Wang+, 2019)
J/ApJ/876/49 : A 10yr reverberation mapping campaign for 3C273 (Zhang+, 2019)
J/ApJ/901/55 : SDSS-RM project: MgII lags 4yrs monitoring (Homayouni+, 2020)
Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- RMID [16/840] Reverberation mapping identifier
5- 9 F5.3 --- z [0.11/0.98] Redshift
11- 16 F6.1 Mpc DistL [524/6234] Luminosity distance
18- 21 F4.1 d THb [3.9/75.2] Hβ time lag
23- 26 F4.1 d e_THb [0.6/16] Negative error on THb
28- 31 F4.1 d E_THb [0.4/15] Positive error on THb
33- 39 F7.4 erg/s L5100 [43.3/45.5] Log AGN continuum luminosity 5100Å
41- 46 F6.4 erg/s e_L5100 [0.0003/0.004] Error on L5100
48- 54 F7.4 erg/s LHb [41.4/43.5] Log Hβ luminosity
56- 61 F6.4 erg/s e_LHb [0.001/0.09] Error on LHb
63- 66 I4 km/s FWHM [2023/8365] FWHM of Hβ in the mean spectrum
68- 70 I3 km/s e_FWHM [7/323] Error on FWHM
72- 75 I4 km/s sigmaM [1078/5069] Line dispersion of Hβ in the mean
spectrum
77- 79 I3 km/s e_sigmaM [5/254] Error on sigmaM
81- 84 I4 km/s sigmaR [976/7568] Line dispersion of Hβ in the rms
spectrum
86- 87 I2 km/s e_sigmaR [8/70] Error on sigmaR
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Byte-by-byte Description of file: tablea4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- RMID [0/827] Reverberation mapping identifier
5- 9 F5.3 --- z [1.41/2.78] Redshift
11- 15 I5 Mpc DistL [9903/22476] Luminosity distance
17- 21 F5.1 d TCiv [19.9/249] CIV time lag
23- 26 F4.1 d e_TCiv [3.1/50.7] Negative error on TCiv
28- 31 F4.1 d E_TCiv [2.4/43.2] Positive error on TCiv
33- 38 F6.3 erg/s L1350 [44.4/46.4] Log continuum luminosity at 1350Å
40- 44 F5.3 erg/s e_L1350 [0.001/0.03] Error on L1350
46- 49 I4 km/s FWHM [1871/9496] FWHM of CIV in the mean spectrum
51- 53 I3 km/s e_FWHM [11/312] Error on FWHM
55- 58 I4 km/s sigmaM [971/5210] Line dispersion of CIV in the mean
spectrum
60- 62 I3 km/s e_sigmaM [8/160] Error on sigmaM
64- 67 I4 km/s sigmaR [1322/4749] Line dispersion of CIV in the rms
spectrum
69- 71 I3 km/s e_sigmaR [5/117] Error on sigmaR
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History:
From electronic version of the journal
(End) Prepared by Coralie Fix [CDS], 01-Mar-2022