Oral Presentation

The collimation of magnetic jets by disk winds. Application to M87

Author(s): Dr Noemie Globus (The Hebrew University of Jerusalem), Pr. Amir Levinson (Tel-Aviv University).

Presenter: Noemie Globus (The Hebrew University, Israel)

We present semi-analytic models for the collimation and confinement of a Poynting dominated jet by a hydrodynamic wind emanating from the upper layers of the accretion disk surrounding the black hole. We investigate the jet collimation efficiency, along with the observational signature of the jet-wind interaction, for different configurations of the wind streamlines and different distributions of the mass effluxion rate. We found that effective collimation of the magnetic jet occurs already for modest ratio of the wind and jet powers. We suggest that a disk wind from the RIAF may be responsible for the collimation of the jet in M87.