Formation Of Bipolar Radio Jets And Lobes From Accretion Disk Around Forming Blackhole At The Center Of Protogalaxies

We propose that radio jets and lobes from QSO’s are “magnetic bipolar jets from forming blackholes”, physically analogous to those of star-formation bipolar flows, but with very much greater energy due to very much greater depth in gravitational potential. We perform 2.5D MHD simulations for the situation in which the condensing mass of the accretion disk associated to the blackhole brought the magnetic flux with it, deforming the magnetic field into an hourglass shape. The differential rotation of the disk rotating at its neck continuously produce magnetic twists and send them out in the form of non-linear torsional Alfven waves to the bipolar directions. The gas of the disk atmosphere and the halo is accelerated helically when this non-linear torsional Alfven waves propagate through them. These NTAW’s, at the same time, dynamically pinch the initially hourglass-shaped field into a collimated rod-shaped structure, and in some cases cause helical instability to make it into a winding structure. Jets from nearby AGN’s may be due to a rejuvenated blackhole accretion by a similar process, with the dynamo-generated central poloidal field of the galaxy interacting with the stirred up gas, eg., in the merging of the galaxies.