2017A&A...604A..90Q


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.12CET15:37:58

2017A&A...604A..90Q - Astronomy and Astrophysics, volume 604A, 90-90 (2017/8-1)

Possible quasi-periodic ejections in quasar B1308+326.

QIAN S.J., BRITZEN S., WITZEL A., KRICHBAUM T.P. and GAN H.Q.

Abstract (from CDS):

Context. The search for periodic features in flux variability and kinematics of superluminal components in blazars is capable of providing significant clues for the understanding of the physical processes in their central engines (black-hole/accretion-disk systems), especially concerning the formation and structure of their relativistic jets and radiation mechanisms.
Aims. The jet swing on parsec-scales and the change of the ejection position angle of the superluminal components with time in the quasar B1308+326 (z=0.997) are investigated as quasi-periodic behaviors.
Methods. A previously published precessing jet nozzle model is applied to model the source kinematics and a possible jet precession period is found.
Results. Based on the model fitting of the kinematics for a subset of components, it is shown that their kinematics, including the shape of the inner trajectories and the motion of the components, could be well fitted in terms of the precessing jet nozzle model and a precession period of ∼16.9±0.3yr is derived. Different precession mechanisms are discussed and compared.
Conclusions. It is shown that the swing of the ejection position angle of the superluminal knots observed in B1308+326 may be due to the orbital motion of a putative supermassive black hole binary in its nucleus. Some relevant parameters of the binary model are estimated. We also discuss the spin-induced precession mechanism in the single black hole scenario and an estimate for the spin of the Kerr black hole is obtained.

Abstract Copyright: © ESO, 2017

Journal keyword(s): galaxies: active - galaxies: jets - galaxies: nuclei - galaxies: nuclei

Simbad objects: 16

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Number of rows : 16

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 4C 50.11 QSO 03 59 29.74726473 +50 57 50.1615765           ~ 388 1
2 QSO B0420-0127 QSO 04 23 15.80072776 -01 20 33.0654034   17.50 17.00 16.28   ~ 1020 2
3 QSO B0605-0834 QSO 06 07 59.69923743 -08 34 49.9781718     18.5 17.70   ~ 381 1
4 4C 56.16 rG 07 49 48.1 +55 54 19           ~ 164 1
5 QSO J0854+2006 BLL 08 54 48.8749311881 +20 06 30.642936668   15.91 15.43 15.56   ~ 1945 1
6 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5244 1
7 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6034 3
8 3C 279 QSO 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2635 2
9 ICRF J130533.0-103319 Sy1 13 05 33.0149111397 -10 33 19.430590671   15.18 15.23 14.46   ~ 477 1
10 7C 1308+3236 BLL 13 10 28.66387 +32 20 43.7831   15.61 15.24 17.91   ~ 736 1
11 3C 345C4 Rad 16 42 58.80665 +39 48 36.9879           ~ 29 0
12 3C 345 QSO 16 42 58.8100340220 +39 48 36.999540578   16.81 16.59 16.84   ~ 1530 2
13 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2058 2
14 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 1975 1
15 3C 454.3 QSO 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2441 2
16 GrW 150914 GWE ~ ~           ~ 328 1

    Equat.    Gal    SGal    Ecl

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2019.11.12-15:37:58

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