TY - JOUR
T1 - OJ287 taken to pieces
T2 - 3rd Karl Schwarzschild Meeting - Gravity and the Gauge/Gravity Correspondence, KMS 2017
AU - Britzen, S.
AU - Fendt, C.
AU - Witzel, G.
AU - Qian, S. J.
AU - Pashchenko, I. N.
AU - Kurtanidze, O.
AU - Zajacek, M.
AU - Martinez, G.
AU - Karas, V.
AU - Aller, M.
AU - Aller, H.
AU - Eckart, A.
AU - Nilsson, K.
AU - Arévalo, P.
AU - Cuadra, J.
AU - Witzel, A.
N1 - Funding Information:
SB thanks the organizers of the KSM for a very inspiring meeting and great hospitality. This research has made use of data from the MOJAVE database that is maintained by the MOJAVE team (Lister et al., 2009, AJ, 137, 3718). The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2018/1/3
Y1 - 2018/1/3
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85040772366&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/942/1/012005
DO - 10.1088/1742-6596/942/1/012005
M3 - Conference article
AN - SCOPUS:85040772366
SN - 1742-6588
VL - 942
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012005
Y2 - 24 July 2017 through 28 July 2017
ER -