J/ApJ/925/97 Fermi-LAT-detected blazars fundamental parameters (Pei+, 2022)
The estimation of fundamental physics parameters for Fermi-LAT blazars.
Pei Z., Fan J., Yang J., Huang D., Li Z.
<Astrophys. J., 925, 97 (2022)>
=2022ApJ...925...97P 2022ApJ...925...97P
ADC_Keywords: BL Lac objects; QSOs; Gamma rays; Redshifts;
Keywords: Blazars ; Flat-spectrum radio quasars ; BL Lacertae objects ;
Gamma-rays
Abstract:
Aiming to delineate the physical framework of blazars, we present an
effective method to estimate four important parameters based on the
idea proposed by Becker & Kafatos (1995ApJ...453...83B 1995ApJ...453...83B), including the
upper limit of central black hole mass M, the Doppler factor δ,
the distance along the axis to the site of the γ-ray production
d (which then can be transformed into the location of
γ-ray-emitting region Rγ) and the propagation angle with
respect to the axis of the accretion disk Φ. To do so, we adopt an
identical sample with 809 Fermi-LAT-detected blazars which had been
compiled in Pei+ (2020PASA...37...43P 2020PASA...37...43P). These four derived parameters
stepping onto the stage may shed new light on our knowledge regarding
γ-ray blazars. With regard to the paper of Becker & Kafatos, we
obtain several new perspectives, mainly in (1) putting forward an
updated demarcation between BL Lacs and FSRQs based on the relation
between broad-line region luminosity and disk luminosity both measured
in Eddington units, i.e., Ldisk/LEdd=4.68x10-3, indicating that
there are some differences between BL Lacs and FSRQs on the accretion
power in the disk; (2) proposing that there is a so-called "appareling
zone", a potential transition field between BL Lacs and FSRQs where
the changing-look blazars perhaps reside; (3) the location of
γ-ray emission region is principally constrained outside the
broad-line region, and for some BL Lacs are also away from the dusty
molecular torus, which means the importance of emission components in
the jet.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 101 809 Fermi γ-ray blazars
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See also:
VII/274 : The Roma BZCAT - 5th edition (Massaro+, 2015)
J/A+AS/132/83 : BVRI photometry of 7 BL Lac objects (Bai+ 1998)
J/A+A/436/799 : X- & gamma-ray fluxes of blazars (Fan+, 2005)
J/ApJS/183/46 : LAT bright gamma-ray source list (0FGL) (Abdo+, 2009)
J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)
J/ApJ/715/429 : First Fermi-LAT AGN catalog (1LAC) (Abdo+, 2010)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/A+A/541/A160 : Planck + X/γ obs. of blazars (Giommi+, 2012)
J/ApJ/748/49 : Optical sp. 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 : Power of relativistic jets in blazars (Ghisellini+, 2014)
J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)
J/MNRAS/450/3568 : Non-Fermi blazar sample (Xiong+, 2015)
J/MNRAS/451/2750 : Blazar sequence (Xiong+, 2015)
J/ApJS/226/20 : X-ray, opt. & radio SEDs of Fermi blazars (Fan+, 2016)
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/other/RAA/19.70 : Sample of 2400 AGNs (Pei+, 2019)
J/ApJS/247/33 : Fermi LAT fourth source catalog (4FGL) (Abdollahi+, 2020)
J/ApJ/892/105 : 4th cat. of LAT-detected AGNs (4LAC) (Ajello+, 2020)
J/other/RAA/20.25 : Sample of 966 AGNs (Pei+, 2020)
J/ApJS/253/10 : 12yrs of R-band phot. of the quasar 3C 454.3 (Fan+, 2021)
J/ApJ/913/146 : B2 1420+32 opt. & gamma LCs & opt. sp. (Mishra+, 2021)
J/ApJS/253/46 : Optical spectroscopy of Fermi blazars (Paliya+, 2021)
J/AJ/161/196 : Opt. obs. of blazars with LAMOST. I. (Pena-herazo+, 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- 17 A12 --- 4FGL 4FGL name, Fermi-LAT (JHHMM.m+DDMM)
19- 42 A24 --- OName Other Name
44- 47 A4 --- Class Classification (1)
49- 53 F5.3 --- z [0.018/3.11] Redshift
55- 58 F4.2 --- alpha-g [1.54/2.97] γ-ray photon index
60- 64 F5.2 10-7W logLg [41.9/48.8] Log, γ-ray luminosity, erg/s
66- 69 F4.2 --- alpha-X [0.04/3.6] X-ray spectral index
71- 77 F7.3 uJy FX1keV [0.001/240]? Flux density at 1keV
79- 83 F5.2 10+7Msun MBH [0.54/100] Derived black hole mass
85- 88 F4.2 --- dR [0.15/8] Derived Doppler factor
90- 95 F6.2 --- d/Rg [5/656] Derived distance to γ-ray
site (2)
97- 101 F5.2 deg Phi [3.84/84.31] Derived propagation angle
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Note (1): Classification as follows:
FSRQ = flat spectrum radio quasar (341 occurrences)
HBL = high synchrotron peak BL Lacs (202 occurrences)
IBL = intermediate synchrotron peak BL Lacs (213 occurrences)
LBL = low synchrotron peak BL Lacs (53 occurrences)
Note (2): derived distance along the axis to the site of the γ-ray
production in units of Rg
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 04-Sep-2023