Continuous Jets and Backflow Models for the Formation of W50/SS 433 in Magnetohydrodynamics Simulations

The formation mechanism of the W50/SS433 complex has long been a mystery. We propose new scenario in which SS433 jets themselves form system. carry out magnetohydrodynamics simulations two-side jet propagation using public code CANS+. As found previous studies, when propagating is lighter than surrounding medium, shocked plasma flows back from tip to core. find that morphology light spheroidal at early times, and afterward, shell wings are developed by broadening spherical cocoon. strongly depends on density ratio injected medium. Meanwhile, lengths only profile also most kinetic energy dissipated oblique shock formed interaction between backflow beam flow, rather terminal shock. position spatially consistent with X-ray TeV gamma-ray hotspots W50.