A helical jet model for OJ287

: Valtonen M, Pihajoki P

Publisher: EDP SCIENCES S A

: 2013

: Astronomy and Astrophysics

: ASTRONOMY & ASTROPHYSICS

: ASTRON ASTROPHYS

: ARTN A28

: 557

: 1

: 5

: 0004-6361

DOI: https://doi.org/10.1051/0004-6361/201321754

Results. We find that this model reproduces the observations well if the changes in the axis of the conical helix propagate outwards with a relativistic speed of about 0.85c. In particular, this model explains at the same time the long-term optical brightness variations as varying Doppler beaming in a component close to the core, i.e., at parsec scale in real linear distance, while the mm and cm radio jet observations are explained as being due to jet wobble at much larger (100 parsec scale) distances from the core.