Simplified models of stellar wind anatomy for interpreting high-resolution data: Analytical approach to embedded spiral geometries

摘要: Recent high-resolution observations have shown stellar winds to harbour complexities which strongly deviate from spherical symmetry, generally assumed as standard wind model. One such morphology is the archimedean spiral, believed be formed by binary interactions, has been directly observed in multiple sources. We seek investigate manifestation observables of spiral structures embedded outflows cool stars. aim provide an intuitive bedrock with upcoming ALMA data can compared and interpreted. By means extended parameter study, we model rotational CO emission outflow asymptotic giant branch To this end, develop a simplified analytical parametrised description 3D structure. This into wind, fed radiative transfer code LIME, produces intensity maps throughout velocity space. Subsequently, spectral signature transitions models, well spatial aspect wide-slit PV diagrams. Additionally, potential for misinterpretation 1D context quantified. Finally, simulate explore impact interefrometric noise artifacts on signatures. The signatures transition v=0 J=3-2 are very efficient at concealing dual nature outflow. Only select few combinations allow lines disclose presence inability disentangle signal result incorrect interpretation context. Consequently, erroneous mass loss rates would calculated...