The aim of this work is to contribute to the understanding of the stellar velocity distribution in the solar neighborhood ( SN ) .
We propose that the structures on the U – V planes , known as the moving groups , can be mainly explained by the spiral arms perturbations .
The applied model of the Galactic disk and spiral arms , with the parameters defined by observational data and with pattern speed \Omega _ { p } = 28.0 km s ^ { -1 } kpc ^ { -1 } , is the same that allowed us to explain the origin of the Local Arm and the Sun ’ s orbit trapped inside the corotation resonance ( CR ) .
We show that the U – V picture of the SN consists of the main component , associated with the CR , and the inner and outer structures , which we could associate with the Hercules and Sirius streams , respectively .
The Coma-Berenices and Hyades-Pleiades groups and the Sun itself belong to the main part .
The substructures of Hercules are formed mainly by the nearby 8/1 , 12/1 , and even 6/1 inner Lindblad resonances , while Sirius is shaped by the bulk of overlapping outer Lindblad resonances , -8/1 , -12/1 , -16/1 , which are stuck to the CR .
This richness in resonances only exists near corotation , which should be of the spiral arms , not of the Galactic bar , whose stable corotation zone is far away from the Sun .
The model ’ s predictions of the velocity distribution match qualitatively and quantitatively the distribution provided by Gaia DR2 .