SiO Emission in the Multi-Lobe Outflow associated with IRAS 16293-2422

摘要: We have mapped the thermal emission line of SiO (v = 0; J 2-1) associated with quadrupolar molecular outflow driven by very cold far-infrared source IRAS 16293-2422. The is significantly enhanced in northeastern red lobe and at position ~50" east source. Strong observed presents evidence for a dynamical interaction between part eastern blue dense ambient gas condensation, however, such an unlikely to be responsible producing morphology. shows spatial velocity structure similar those CO outflow, suggesting that comes from itself. reproduced simple spatio-kinematic model bow shock 19-24 km/s inclined 30-45 deg plane sky. This implies independent due two separate bipolar outflows. The western has broad pedestal shape low intensity. Unlike lobe, extent restricted its central region. structures profiles suggest three different types are this outflow; arises interface outflowing clump, coming itself, intensity region lobe.