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OJ287: deciphering the 'Rosetta stone of blazars

文献类型：期刊论文

作者Britzen, S.1; Fendt, C.2; Witzel, G.3; Qian, S. -J.4; Pashchenko, I. N.5; Kurtanidze, O.6,7; Zajacek, M.1,8,11; Martinez, G.3; Karas, V.8; Aller, M.9
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2018-08-01
卷号478期号:3页码:3199-3219
ISSN号0035-8711
关键词black hole physics techniques: interferometric BL Lacertae objects: individual: OJ287
DOI10.1093/mnras/sty1026
英文摘要OJ287 is the best candidate active galactic nucleus (AGN) for hosting a supermassive binary black hole (SMBBH) at very close separation. We present 120 Very Long Baseline Array (VLBA) observations (at 15 GHz) covering the time between April 1995 and April 2017. We find that the OJ287 radio jet is precessing on a time-scale of similar to 22 yr. In addition, our data are consistent with a jet-axis rotation on a yearly time-scale. We model the precession (24 +/- 2 yr) and combined motion of jet precession and jet-axis rotation. The jet motion explains the variability of the total radio flux-density via viewing angle changes and Doppler beaming. Half of the jet-precession time-scale is of the order of the dominant optical periodicity time-scale. We suggest that the optical emission is synchrotron emission and related to the jet radiation. The jet dynamics and flux-density light curves can be understood in terms of geometrical effects. Disturbances of an accretion disc caused by a plunging BH do not seem necessary to explain the observed variability. Although the SMBBH model does not seem necessary to explain the observed variability, an SMBBH or Lense-Thirring precession (disc around single BH) seem to be required to explain the time-scale of the precessing motion. Besides jet rotation also nutation of the jet axis could explain the observed motion of the jet axis. We find a strikingly similar scaling for the time-scales for precession and nutation as indicated for SS433 with a factor of roughly 50 times longer in OJ287.
WOS关键词SUPERMASSIVE BLACK-HOLE ; ACTIVE GALACTIC NUCLEI ; BL-LACERTAE OBJECTS ; LENS-THIRRING PRECESSION ; DOT-SIGMA RELATION ; OJ 287 ; ACCRETION DISCS ; POLARIZATION STRUCTURE ; RADIO-SOURCES ; SCALE JETS
资助项目Shota Rustaveli National Science Foundation[FR/217554/16] ; NSF[AST-0909218] ; NSF[AST-1412615] ; NSF[AST-0607523] ; Levine-Leichtman Family Foundation ; University of Cologne[SFB956] ; MPIfR ; NASA[NNX09AU16G] ; NASA[NNX10AP16G] ; NASA[NNX11AO13G] ; NASA[NNX13AP18G] ; University of Michigan ; University of Bonn[SFB956]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000441282300027
资助机构Shota Rustaveli National Science Foundation ; Shota Rustaveli National Science Foundation ; NSF ; NSF ; Levine-Leichtman Family Foundation ; Levine-Leichtman Family Foundation ; University of Cologne ; University of Cologne ; MPIfR ; MPIfR ; NASA ; NASA ; University of Michigan ; University of Michigan ; University of Bonn ; University of Bonn ; Shota Rustaveli National Science Foundation ; Shota Rustaveli National Science Foundation ; NSF ; NSF ; Levine-Leichtman Family Foundation ; Levine-Leichtman Family Foundation ; University of Cologne ; University of Cologne ; MPIfR ; MPIfR ; NASA ; NASA ; University of Michigan ; University of Michigan ; University of Bonn ; University of Bonn ; Shota Rustaveli National Science Foundation ; Shota Rustaveli National Science Foundation ; NSF ; NSF ; Levine-Leichtman Family Foundation ; Levine-Leichtman Family Foundation ; University of Cologne ; University of Cologne ; MPIfR ; MPIfR ; NASA ; NASA ; University of Michigan ; University of Michigan ; University of Bonn ; University of Bonn ; Shota Rustaveli National Science Foundation ; Shota Rustaveli National Science Foundation ; NSF ; NSF ; Levine-Leichtman Family Foundation ; Levine-Leichtman Family Foundation ; University of Cologne ; University of Cologne ; MPIfR ; MPIfR ; NASA ; NASA ; University of Michigan ; University of Michigan ; University of Bonn ; University of Bonn
源URL[http://ir.bao.ac.cn/handle/114a11/22491]  
专题中国科学院国家天文台
通讯作者Britzen, S.
作者单位1.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
2.Max Planck Inst Astron, D-69117 Heidelberg, Germany
3.Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
5.Russian Acad Sci, Lebedev Phys Inst, Ctr Astro Space, 84-32 Profsoyuznaya St,GSP-7, Moscow 117997, Russia
6.Abastumani Observ, GE-0301 Mt Kanobili, Abastumani, Rep of Georgia
7.Kazan Fed Univ, Engelhard Astron Observ, Tatarstan 422526, Russia
8.Acad Sci, Astron Inst, Bocni 2 1401, CZ-14131 Prague, Czech Republic
9.Univ Michigan, Ann Arbor, MI 48109 USA
10.Univ Turku, Dept Phys & Astron, Tuorla Observ, FI-20500 Turku, Finland
推荐引用方式
GB/T 7714		 Britzen, S.,Fendt, C.,Witzel, G.,et al. OJ287: deciphering the 'Rosetta stone of blazars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,478(3):3199-3219.
APA Britzen, S..,Fendt, C..,Witzel, G..,Qian, S. -J..,Pashchenko, I. N..,...&Witzel, A..(2018).OJ287: deciphering the 'Rosetta stone of blazars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,478(3),3199-3219.
MLA Britzen, S.,et al."OJ287: deciphering the 'Rosetta stone of blazars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 478.3(2018):3199-3219.

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