How the bar properties affect the induced spiral structure

ABSTRACT Stellar bars and spiral arms coexist co-evolve in most disc galaxies the local Universe. However, physical nature of this interaction remains a matter debate. In work, we present set numerical simulations based on isolated galactic models aimed to explore how bar properties affect induced structure. We cover large combination properties, including length, axial ratio, mass, rotation rate. use three describing with rising, flat, declining curves. found that pitch angle best correlates pattern speed amplitude quadrupole moment. Our results suggest curves are efficient forming grand design structure, evidenced by spirals larger angle. also test effects velocity ellipsoid subset simulations. as increase radial anisotropy, their but become less coherent smaller amplitude.