Invited Presentation

Jet Collimation Break in M87: Exploring the Fundamental Property of AGN Jets

Author(s): Masanori Nakamura

Presenter: Masanori Nakamura (ASIAA)

M87, possibly the most studied relativistic jet in active radio galaxies, has been spatially resolved from ten to tens of millions of Schwarzschild radii; it gives a unique opportunity for understanding an AGN jet from birth to termination. Several key issues in AGN jets can be extensively discussed based on multi frequency radio observations and magnetohydrodynamic (MHD) jet theories toward M87. One of our remarkable findings in M87 is the "jet collimation break (JCB)", a structural change from parabolic to conical geometry, which coincides to a transition from increasing to decreasing in observed proper motions. In this talk, we discuss about the JCB as a fundamental property in AGNs under the interplay with the SMBH growth and evolution of early-type galaxies.