OJ287 taken to pieces: the origin of a precessing and rotating jet
Britzen,S1; Fendt,C2; Witzel,G3; Qian,S-J4; Pashchenko,I N5; Kurtanidze,O6,7; Zajacek,M1,8,10; Martinez,G3; Karas,V8; Aller,M9; Aller,H9; Eckart,A1,10; Nilsson,K11; Arévalo,P12; Cuadra,J13; Witzel,A1
Source PublicationJournal of Physics: Conference Series
AbstractAbstract OJ287 is the best candidate active galactic nucleus for hosting a supermassive binary black hole at very close separation, corresponding to the orbital period of the order of ~9 yr. We studied the pc-scale jet dynamics in 118 Very Long Baseline Array (VLBA) observations at 15 GHz covering the time between Apr. 1995 and Jan. 2017. To our knowledge, this is the first time, that the kinematics of the Blandford-Znajek jet (originating in the ergosphere of a rotating black hole) and jet sheath (originating from the accretion disk) are seen and traced in observations. We also find that the OJ287 radio jet is rotating and precessing. The jet dynamics as well as the flux-density light curves can be understood in terms of geometrical effects. A binary black hole model can explain the time scale of the precessing motion. Lense-Thirring precession of an accretion disc surrounding a single black hole is consistent with the time scale as well.
WOS IDIOP:1742-6588-942-1-012005
PublisherIOP Publishing
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Document Type期刊论文
Affiliation1.Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
2.Max-Planck-Institut für Astronomie, K?nigstuhl, Heidelberg, Germany
3.UCLA, Department of Physics and Astronomy, LA, CA 90095, USA
4.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
5.Astro Space Center, Lebedev Physical Institute, Russian Academy of Sciences
6.Abastumani Observatory, Mt Kanobili, 0301 Abastumani, Georgia
7.Engelhardt Astronomical Observatory, Kazan Federal University, Tatarstan, Russia
8.Astronomical Institute, Academy of Sciences, Bo?ní II 1401, 14131 Prague, Czech Republic
9.University of Michigan, Ann Arbor, MI 48109, USA
10.I. Physikalisches Institut der Universit?t zu K?ln, Zülpicher Str. 77, 50937 K?ln, Germany
11.Tuorla Observatory, Department of Physics and Astronomy, University of Turku, 20500, Turku, Finland
12.Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Gran Breta?a No. 1111, Playa Ancha, 2360102 Valparaíso, Chile
13.Instituto de Astrofísica, Pontificia Universidad Católica de Chile, 782-0436 Santiago, Chile
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GB/T 7714
Britzen,S,Fendt,C,Witzel,G,et al. OJ287 taken to pieces: the origin of a precessing and rotating jet[J]. Journal of Physics: Conference Series,2017,942(1).
APA Britzen,S.,Fendt,C.,Witzel,G.,Qian,S-J.,Pashchenko,I N.,...&Witzel,A.(2017).OJ287 taken to pieces: the origin of a precessing and rotating jet.Journal of Physics: Conference Series,942(1).
MLA Britzen,S,et al."OJ287 taken to pieces: the origin of a precessing and rotating jet".Journal of Physics: Conference Series 942.1(2017).
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