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J/ApJ/806/109       Rest-frame optical spectra of 3<z<6 QSOs       (Jun+, 2015)

Rest-frame optical spectra and black hole masses of 3<z<6 quasars. Jun H.D., Im M., Lee H.M., Ohyama Y., Woo J.-H., Fan X., Goto T., Kim D., Kim J.H., Kim M., Lee M.G., Nakagawa T., Pearson C., Serjeant S. <Astrophys. J., 806, 109 (2015)> =2015ApJ...806..109J (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Redshifts ; Spectroscopy Keywords: galaxies: active; galaxies: evolution; quasars: emission lines; quasars: supermassive black holes Abstract: We present the rest-frame optical spectral properties of 155 luminous quasars at 3.3<z<6.4 taken with the AKARI space telescope, including the first detection of the Hα emission line as far out as z∼6. We extend the scaling relation between the rest-frame optical continuum and the line luminosity of active galactic nuclei (AGNs) to the high-luminosity, high-redshift regime that has rarely been probed before. Remarkably, we find that a single log-linear relation can be applied to the 5100Å and Hα AGN luminosities over a wide range of luminosity (1042<L5100<1047ergs/s) or redshift (0<z<6), suggesting that the physical mechanism governing this relation is unchanged from z=0 to 6, over five decades in luminosity. Similar scaling relations are found between the optical and the UV continuum luminosities or line widths. Applying the scaling relations to the Hβ black hole (BH) mass (MBH) estimator of local AGNs, we derive the MBH estimators based on the Hα, MgII, and CIV lines, finding that the UV-line-based masses are overall consistent with the Balmer-line-based, but with a large intrinsic scatter of 0.40dex for the CIV estimates. Our 43 MBH estimates from Hα confirm the existence of BHs as massive as ∼1010M out to z∼5 and provide a secure footing for previous results from MgII-line-based studies that a rapid MBH growth has occurred in the early universe. Description: The majority of the data comes from the AKARI program Quasar Spectroscopic Observations with NIR Grism (QSONG) taken between 2008 Jun and 2010 Jan (154 objects observed with the NIR grism (NG)). The AKARI/IRC offers a low, wavelength-dependent spectral resolution (R=120 at 3.6um). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 123 154 Continuum and line-based properties of the sample
See also: II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012) V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012) VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010) J/ApJS/216/17 : AKARI 2.5-5um spectra of nearby Type-1 AGNs (Kim+, 2015) J/ApJ/779/104 : Luminous dust-poor SDSS QSOs at z<4.5 (Jun+, 2013) J/ApJ/773/14 : BOSS: quasar luminosity function (Ross+, 2013) J/ApJ/768/105 : z∼5 QSO LF from SDSS Stripe 82 (McGreer+, 2013) J/ApJ/753/125 : NIR spectroscopy follow-up of 60 SDSS-DR7 QSOs (Shen+, 2012) J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011) J/ApJ/699/800 : Mass functions of active black holes (Vestergaard+, 2009) J/ApJ/699/782 : High-redshift SDSS-DR5 QSOs (Diamond-Stanic+, 2009) J/ApJ/680/169 : SDSS DR5 virial black hole masses (Shen+, 2008) J/ApJS/175/116 : SNU bright quasar survey (SNUQSO) (Lee+, 2008) J/ApJ/666/757 : CIV 1549Å emission line in AGNs (Sulentic+, 2007) J/AJ/131/2766 : Quasar luminosity function from SDSS-DR3 (Richards+, 2006) J/ApJ/640/579 : Near-infrared spectra of 27 SDSS quasars (Glikman+, 2006) J/ApJ/613/682 : AGN central masses & broad-line region sizes (Peterson+, 2004) J/ApJS/97/347 : Source Catalog, PMN Equatorial Survey (Griffith+ 1995) J/AJ/109/1498 : Large Bright Quasar Survey VI (LBQS) (Hewett+, 1995) J/ApJ/269/352 : Quasar evolution (Schmidt+, 1983) : SDSS-III home page Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 26 A26 --- Name Target name (1) 28- 31 F4.2 --- zRef [3.3/6.5] Redshift from references (2) 33- 36 F4.2 --- zHalpha [3.3/6.3]? Redshift measured from Hα 39- 43 F5.2 [10-7W] log(L1350A) [46.4/47.5]? Log 1350A luminosity 45- 48 F4.2 [10-7W] e_log(L1350A) [0.01/0.2]? Uncertainty in L1350A 51- 55 F5.2 [10-7W] log(L5100A) [46/47.7]? Log 5100A luminosity 57- 60 F4.2 [10-7W] e_log(L5100A) [0/0.2]? Uncertainty in L5100A 62 A1 --- l_log(LHa) Upper limit Flag on log(LHa) (3) 63- 67 F5.2 [10-7W] log(LHa) [44.7/48.5]? Log Hα luminosity 69- 72 F4.2 [10-7W] e_log(LHa) [0.06/0.4]? Uncertainty in LHa 75- 79 F5.2 10+3km/s W(CIV) [1.5/12.1]? FWHM of the CIV line (1000km/s) 81- 84 F4.2 10+3km/s e_W(CIV) [0.07/2.7]? Uncertainty in W(CIV) 87 A1 --- l_W(Ha) Upper limit Flag on log(LHa) (3) 88- 92 F5.2 10+3km/s W(Ha) [2.5/8]? FWHM of Hα line (1e3km/s) 94- 97 F4.2 10+3km/s e_W(Ha) [0.6/3.4]? Uncertainty in W(Ha) 101-105 F5.2 [Msun] logMBH(CIV) [8.5/10.8]? Log Black Hole mass from CIV (4) 107-110 F4.2 [Msun] e_logMBH(CIV) [0.08/0.4]? Uncertainty in MBH(CIV) (4) 113 A1 --- l_logMBH(Ha) Upper limit Flag on logMBH(LHa) (3) 114-118 F5.2 [Msun] logMBH(Ha) [9.1/10.6]? Log Black Hole mass from Hα (4) 120-123 F4.2 [Msun] e_logMBH(Ha) [0.2/0.6]? Uncertainty in MBH(Ha) (4)
Note (1): PSS J1745+6848 is very likely a misprint for PSS J1745+6846; table corrected at CDS. Note (2): From supplementary data (table 2; spectra): ------------------------------------------------------------------------------- Name Wavelength N Exposure Reference ------------------------------------------------------------------------------- SDSS-DR10 3800-9200Å 111 ≥45min Ahn et al. 2014ApJS..211...17A BOSS 3650-10400Å 98 ≥45min Ahn et al. 2014ApJS..211...17A APM-UKST ∼3500-9000Å 16 15-60min Storrie-Lombardi+ (1996ApJ...468..121S), Peroux et al. (2001AJ....121.1799P) Hale 4500-9000Å 1 30min Schneider et al. (1989AJ.....98.1507S) ------------------------------------------------------------------------------- Note (3): 2σ upper limits derived for L5100A, LHa, W(Ha), and logMBH(Ha) Note (4): Black Hole mass from CIV and Hα derived from Equations (10) and (7), respectively.
History: From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 14-Oct-2015
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