A kinematic excess in the annular gap and gas-depleted cavity in the disc around HD 169142

We present ALMA band 6 images of the <SUP>12</SUP>CO, <SUP>13</SUP>CO, and C<SUP>18</SUP>O J = 2-1 line emissions for the circumstellar disc around HD 169142, at ~8 au spatial resolution. We resolve a central gas-depleted cavity, along with two independent near-symmetric ring-like structures in line emission: a well-defined inner gas ring [~25 au] and a second relatively fainter and diffuse outer gas ring [~65 au]. We identify a localized super-Keplerian feature or vertical flow with a magnitude of ~75 ms<SUP>-1</SUP> in the <SUP>12</SUP>CO map. This feature has the shape of an arc that spans azimuthally across a position angle range of -60° to 45° and radially in between the B1[26au] and B2[59au] dust rings. Through reconstruction of the gas surface density profile, we find that the magnitude of the background perturbations by the pressure support and self-gravity terms are not significant enough to account for the kinematic excess. If of planetary origin, the relative depletion in the gas-density profile would suggest a 1 M<SUB>J</SUB> planet. In contrast, the central cavity displays relatively smooth kinematics, suggesting either a low-mass companion and/or a binary orbit with a minimal vertical velocity component.