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Constraints on the Galactic Bar from the Hercules stream as traced with RAVE across the Galaxy
T. Antoja, A. Helmi, W. Dehnen +20
Non-axisymmetries in the Galactic potential (spiral arms and bar) induce kinematic groups such as the Hercules stream. Assuming that Hercules is caused by the effects of the Outer…
3D test particle simulations of the Galactic disks. The kinematical effects of the bar
Giacomo Monari, Teresa Antoja, Amina Helmi
Aims: To study the imprints of a rotating bar on the kinematics of stars in the thin and thick disks throughout the Galaxy. Methods: We perform test particle numerical simulations…
On the galaxy spiral arms' nature as revealed by rotation frequencies
Santi Roca-Fàbrega, Octavio Valenzuela, Francesca Figueras +4
High resolution N-body simulations using different codes and initial condition techniques reveal two different behaviours for the rotation frequency of transient spiral arms like s…