Analysis of the two populations in ρ Oph based on their proper motion. Top row: galactic distribution of the known and new ρ Oph members, including all new sources (without stability cut), while impostors are excluded. Arrows represent the tangential velocity vectors, color-coded for the angle between the vectors and the l-axis (θ_l, HEL and θ_l, LSR in left and right panel, respectively). Left panel: heliocentric tangential velocity vectors (v_HEL), as derived from Gaia EDR3 parameters (v_l, v_b), right panel: tangential velocity vectors relative to the local standard of rest (v_LSR based on v_l, LSR, v_b, LSR). The black arrows in the bottom right corners indicate the vector length for velocities of 20 km s⁻¹ and 5 km s⁻¹ for v_HEL and v_LSR, respectively. These reference vectors have an angle of 180° relative to the l-axis. Bottom row: histograms showing the distributions of angles θ_l, HEL and θ_l, LSR for the sources as in the top panels. The bins in the left histogram have a width of 1° and in the right histogram of 2.5° since θ_l, LSR covers a larger range of angles. The histograms are color-coded for the angles as in the top panels.