J/ApJ/925/40 Fermi blazar jet properties (Xiao+, 2022)
The relativistic jet and central engine of Fermi blazars.
Xiao H., Ouyang Z., Zhang L., Fu L., Zhang S., Zeng X., Fan J.
<Astrophys. J., 925, 40 (2022)>
=2022ApJ...925...40X 2022ApJ...925...40X
ADC_Keywords: BL Lac objects; QSOs; Active gal. nuclei; Redshifts;
Gamma rays; Black holes
Keywords: Blazars ; Flat-spectrum radio quasars ; BL Lacertae objects ;
Active galactic nuclei ; Jets
Abstract:
The origin of jets is one of the most important issues concerning
active galactic nuclei, yet it has remained obscure. In this work, we
made use of information from emission lines, spectral energy
distributions, and Fermi-LAT γ-ray emission to construct a
blazar sample that contains 667 sources. We note that jet power
originations are different for BL Lacertae objects (BL Lacs) and
flat-spectrum radio quasars (FSRQs). The correlation between jet power
Pjet and the normalized disk luminosity LDisk/LEdd shows a slope
of -1.77 for BL Lacs and a slope of 1.16 for FSRQs. The results seem
to suggest that BL Lac jets are powered by extracting black hole (BH)
rotation energy, while FSRQ jets are mostly powered by accretion
disks. Meanwhile, we find the accretion ratio (dM/dt)/(dM/dt)Edd
increases with the normalized γ-ray luminosity. Based on this,
we propose a dividing line,
log(LBLR/LEdd)=0.25log(Lγ/LEdd)-2.23, to separate FSRQs
and BL Lacs in the diagram of LBLR/LEdd against Lγ/LEdd
using a machine-learning method; the method gives an accuracy of
84.5%. In addition, we propose an empirical formula,
MBH/M☉∼Lγ0.65/21.46, to estimate BH mass based on a
strong correlation between γ-ray luminosity and BH mass. Strong
γ-ray emission is typical in blazars, and the emission is always
boosted by a Doppler-beaming effect. In this work, we generate a new
method to estimate a lower limit of Doppler factor δ and give
δBLLac=7.94 and δFSRQ=11.55.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 116 667 Optical and γ-ray parameters
table2.dat 71 667 Jet parameters
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See also:
IX/67 : Incremental Fermi LAT 4th source cat. (4FGL-DR3) (Fermi-LAT col., 2022)
J/ApJ/609/539 : Kinematics of parsec-scale radio jets (Kellermann+, 2004)
J/ApJ/699/800 : Mass functions of active black holes (Vestergaard+, 2009)
J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/other/Sci/338.1445 : Relativistic jets from BH systems (Nemmen+, 2012)
J/ApJ/748/49 : Opt. spectroscopy of 1LAC broad-line blazars (Shaw+, 2012)
J/other/RAA/13.259 : γ-ray Doppler factor for Fermi blazars (Fan+, 2013)
J/other/RAA/14.1135 : Doppler factor for a Fermi blazar sample (Fan+, 2014)
J/other/Nat/515.376 : Relativistic jets in blazars (Ghisellini+, 2014)
J/MNRAS/451/4193 : Fermi blazars jet power and accretion (Chen+, 2015)
J/ApJS/226/20 : X-ray, opt. & radio SEDs of Fermi blazars (Fan+, 2016)
J/ApJ/835/L38 : Fermi blazars with Doppler factors (Fan+, 2017)
J/ApJS/235/39 : Jet properties of γ-ray-loud 3FGL AGNs (Chen, 2018)
J/ApJ/866/137 : Bright blazars var. brightness temp. (Liodakis+, 2018)
J/ApJS/247/33 : The Fermi LAT 4th source catalog (4FGL) (Abdollahi+, 2020)
J/ApJS/253/46 : Optical spectroscopy of Fermi blazars (Paliya+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [4FGL]
6- 18 A13 --- 4FGL 4FGL Source Name (JHHMM.m+DDMMa)
20 A1 --- Class Class (G1)
22- 29 F8.6 --- z [0.00085/6.45]? Redshift from NED
31- 38 E8.2 ph/cm2/s Fg [6.2e-11/8.7e-08] Integral photon flux
from 1 to 100GeV, photon/cm2/s
40- 47 E8.2 ph/cm2/s e_Fg [2e-11/5.6e-10] Uncertainty in Fg
49- 52 F4.2 --- Gamma [1.9/3.1] Photon index
54- 59 F6.3 [mW/m2] logLHa [40.89/44.41]? Log luminosity of Hα
emission line, erg/cm/s
61- 65 F5.3 [mW/m2] e_logLHa [0.004/0.4]? Uncertainty in logLHa
67- 72 F6.3 [mW/m2] logLHb [40.79/44.56]? Log luminosity of Hβ
emission line, erg/cm/s
74- 78 F5.3 [mW/m2] e_logLHb [0.003/0.4]? Uncertainty in logLHb
80- 85 F6.3 [mW/m2] logLMgII [40.97/44.8]? Log luminosity of MgII
emission line, erg/cm/s
87- 91 F5.3 [mW/m2] e_logLMgII [0.003/0.5]? Uncertainty in logLMgII
93- 98 F6.3 [mW/m2] logLCIV [42.6/45.5]? Log luminosity of CIV
emission line, erg/cm/s
100- 104 F5.3 [mW/m2] e_logLCIV [0.004/0.31]? Uncertainty in logLCIV
106- 110 F5.2 [Msun] logMBH [6.3/10.2] BH mass
112- 116 F5.2 [Msun] e_logMBH [0/0.9] Uncertainty in logMBH
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [4FGL]
6- 18 A13 --- 4FGL 4FGL Source Name (JHHMM.m+DDMMa)
20 A1 --- Class Class (G1)
22- 29 F8.6 --- z [0.00085/6.45]? Redshift from NED
31- 35 F5.2 [10-7W] logPrad [43.5/47.7]? Log of jet radiation power, erg/s
37- 41 F5.2 [10-7W] logPjet [44.6/48.44]? Log of jet entire power, erg/s
43- 47 F5.2 [mW/m2] logLd [43.65/47.1]? Log of luminosity of accretion
disk
49- 51 A3 --- Ref References for logPrad, logPjet, logLdisk (1)
53- 57 F5.2 --- delta1 [0.27/88.5]? Doppler factor,
Liodakis+ (2018, J/ApJ/866/137)
59- 64 F6.2 --- delta2 [0.01/203]? Doppler factor, method proposed
in Zhang+ (2020ApJ...897...10Z 2020ApJ...897...10Z)
66- 71 F6.2 --- delta [2.9/38.3]? Estimated lower-limit Doppler
factor, present work
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Note (1): References for logPrad, logPjet, logLdisk as follows:
G14 = Ghisellini et al. (2014, J/other/Nat/515.376)
T20 = Tan et al. (2020ApJS..248...27T 2020ApJS..248...27T)
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Global notes:
Note (G1): Classification as follows:
B = BL Lacs (53 occurrences)
F = Flat-spectrum radio quasars (FSRQs; 558 occurrences)
U = Uncertain-type blazars (BCUs; 56 occurrences)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 30-Aug-2023