J/ApJ/925/97ivo://CDS.VizieR/J/ApJ/925/97doi:10.26093/cds/vizier.19250097CDSPei Z.Fan J.Yang J.Huang D.Li Z.2025-05-22T20:12:01Z2023-10-04T08:49:18ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frbl-lacertae-objectsquasarsgamma-ray-astronomyredshiftedAiming 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), including the upper limit of central black hole mass M, the Doppler factor {delta}, the distance along the axis to the site of the {gamma}-ray production d (which then can be transformed into the location of {gamma}-ray-emitting region R_{gamma}_) and the propagation angle with respect to the axis of the accretion disk {Phi}. To do so, we adopt an identical sample with 809 Fermi-LAT-detected blazars which had been compiled in Pei+ (2020PASA...37...43P). These four derived parameters stepping onto the stage may shed new light on our knowledge regarding {gamma}-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., L_disk_/L_Edd_=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 {gamma}-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.2022ApJ...925...97Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/925/97CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/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/{gamma} obs. of blazars (Giommi+, 2012)J/ApJ/748/49 : Optical sp. of 1LAC broad-line blazars (Shaw+, 2012)J/other/RAA/13.259 : {gamma}-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 {gamma}-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)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/925/97https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/925/97http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/925/97https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/925/97https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/925/97http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/925/97GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/925/97/table1 (Fermi {gamma}-ray blazars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/925/97/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/925/97/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/925/97/table1?GETtext/xml+votable180.050000true1.1485644-47.60544560.0055555555555555566/60 100 110 250 342 398 438 447 532 556 579 615 700 716 808 911 988 991 1085 1120 1154 1509 1546 1782 2094 2143 2249 2273 2295 2331 2340 2404 2414 2505 2549 2605 2610 2621 2792 2836 2867 3023 3096 3428 3431 3492 3616 3629 3675 3784 3820 3882 3886 3951 3974 4160 4255 4260 4317 4472 4550 4572 4685 4695 4705 4770 4805 4820 4855 4863 4880 4882 4964 5072 5091 5125 5139 5154 5156 5162 5270 5284 5311 5352-5353 5371 5413 5423 5432 5448 5458 5462 5483 5516 5521-5523 5536 5546 5589 5597 5614 5673 5693 5723 5771 5784 5795 5803 5817 5836 5848 5870 5872 5918 5990 5999 6015 6018 6021 6035 6067 6088 6096 6101 6104 6110 6164 6167 6348 6368 6406 6427 6436 6496 6498 6501 6507 6548 6636 6641 6647 6764 6777 6815 6923 6948 6963 6976 6984 6996 7004 7028 7038 7045 7176 7181 7233 7235 7245 7265 7285 7296 7346 7354 7380 7389 7411 7426 7446 7448 7475 7478 7518 7548 7569-7570 7623 7640-7641 7653 7699 7709 7896 7911 7969 8004 8031 8057 8067 8071 8106 8177 8290 8299 8321 8374 8466 8487 8515 8556 8595 8615 8699 8751 8762 8773 8915 8945 8955 8972 9013 9049 9075 9196 9204 9245 9301 9310 9353 9410 9442 9445 9460 9501 9545 9554 9566 9570 9612 9618 9632-9633 9676 9688 9711 9714 9723 9762 9773 9811 9813 9855 9872 9906 9914 9960 9991 9996 9998 10006 10033 10071 10163 10198 10213 10216 10249 10280 10352 10422 10426 10466 10474 10501 10512 10524 10548 10561 10572 10605 10627 10642 10656 10669 10681 10715 10780 10800-10801 10843 10852 10867 10921 10938 10949 10975 10983 10996 11004 11012 11027 11081 11099-11100 11116 11124 11143 11153 11209 11212 11242 11253 11290 11321 11352 11373-11374 11396 11407 11426 11430 11444 11449 11515 11522-11523 11631 11639-11640 11649 11682 11734 11736 11749 11756 11787 11839 11876 11912 11936 12164 12173 12218 12231 12258 12301 12352 12466 12473 12475 12599 12604 12619 12687 12902 13098 13156 13179 13320 13352-13353 13406 13485 13586 13613 13664 13673 13693 13705 13820 13927 14068 14641 14751 14797 14854 14871 14955 15023 15037 15059 15147 15211 15269 15286 15494-15495 15916 15947 15969 15973 16027 16049 16059 16170 16223 16272 16281 16298 16447 16478 16532 16534 16606 16638 16665 16676 16720 16796 16806 16816 17019 17146 17161 17184 17186 17351 17364 17414 17443 17516 17537 17541 17574 17579 17775 17791 17820 17843 17857 17917 17927 17994 18022 18035 18037 18084 18219 18259 18270 18402 18457 18506 18624 18661 18718 18755 19042 19088 19157 19190 19271 19327 19370 19398 19553 19593 19622 19629 19724 19756 19789 19831 19886 19907 20016 20020 20083 20099 20141 20202 20213 20325 20456 20468 20476 20483 20489 20577 20604 20624 20657 20777 20888 21121 21131 21179 21358 21564 21768 21873 21935 21960 21968 21972 22305 22363 22372 22396 22658 22823 22917 22950 23011 23014-23015 23099 23121 23127 23134 23181 23222 23306 23416 23691 23835 24027 24084 24099 24123 24260 24571 24608 24744 24775 24785 24845 24902 25061 25131-25132 25196 25302 25501 25503 25519 25542 25630 25673 25677 25734 25818 25835 25864 26036 26083 26131 26242 26292 26303 26322 26340 26360 26406 26483 26550 26595 26614 26626 26798 26873 26898 26964 26983 27060 27165 27217 27243 27310 27329 27423 27523-27524 27716 27722 27750 27815 27846 27857 27926 27945 27955 28042 28083 28115 28138-28139 28167 28199 28225 28339 28342 28352 28388 28401 28454 28479 28492 28498 28517 28542 28546 28662 28673 29016-29017 29072 29570 29675 29714 30036 30039 30446 30928 31190 31391 31407 31430 31451 31663-31664 31698 31894 32174 32261 32311 32345 32607 32621 32660 32712 32904 33164 33370 33549 33560 33570 33583 33611 33684 33774 33819 33825 33827 33880-33881 34013 34086 34095 34099 34123 34209 34264 34428 34461 34517 34520 34528 34534 34572 34675 34771 34870 34911 35074 35076 35079 35119 35187 35199 35252 35281 35301 35342 35370 35384 35441 35475 35590 35700 35706 35722 35786 35801 35821 35833 35963 35981 36033 36058 36100 36111 36134 36151 36155 36188 36278 36342 36551 36554 36602 36770 36941 37045 37385 37512 37529 37994 38189 38277 38481 38763 38772 38797 38868 38953 39077 39489 39505 39848 40174 40344 40353 40412 40479 40527 40689 40692 40703 40831 41072 41363 41374 41460 42481 42515 42571 42609 42901 42914 42980 43366 43380 43382 43399 43451 43822 43883 44043 44059 44069 44147 44247 44340 44705 44730 44813 44908 45011 45038 45178 45943 46055 46142 46251 46258 46310 46337 46373-46374 46442 46444 46545 46721 46740 46798 46887 46964 47014 47016 47057 47319 47327 47375 47512 47534 47540 47649 47894 47960 48023 48123 48245 48388 48419 48589 48595 48603 48624 48798 48846 48985 49071https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/925/97?format=asciiGamma-raydefaultJ/ApJ/925/97/table1Fermi {gamma}-ray blazarsSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint4FGL4FGL name, Fermi-LAT (JHHMM.m+DDMM)meta.id;meta.maincharONameOther Namemeta.idcharClassClassification (1)src.classcharz[0.018/3.11] Redshiftsrc.redshiftfloatalpha-g[1.54/2.97] {gamma}-ray photon indexspect.index;em.gammafloatlogLg[41.9/48.8] Log, {gamma}-ray luminosity, erg/s1e-07Wphys.luminosity;em.gammafloatalpha-X[0.04/3.6] X-ray spectral indexspect.index;em.X-rayfloatFX1keV[0.001/240]? Flux density at 1keVuJyphot.flux;em.X-rayfloatnullableMBH[0.54/100] Derived black hole mass1e+07solMassphys.massfloatdR[0.15/8] Derived Doppler factorspect.dopplerParamfloatd/Rg[5/656] Derived distance to {gamma}-ray site (2)pos.distancefloatPhi[3.84/84.31] Derived propagation angledegpos.posAngfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main