Recent VLT/SPHERE near-infrared imaging observations revealed two spiral arms with a near m = 2 rotational symmetry in the protoplanetary disk around the \sim 1.7Â M _ { \odot } Herbig star HDÂ 100453 .
A \sim 0.3Â M _ { \odot } M dwarf companion , HDÂ 100453Â B , was also identified at a projected separation of 120 AU from the primary .
In this Letter , we carry out hydrodynamic and radiative transfer simulations to examine the scattered light morphology of the HDÂ 100453 disk as perturbed by the companion on a circular and coplanar orbit .
We find that the companion truncates the disk at \sim 45 AU in scattered light images , and excites two spiral arms in the remaining ( circumprimary ) disk with a near m = 2 rotational symmetry .
Both the truncated disk size and the morphology of the spirals are in excellent agreement with the SPHERE observations at Y , J , H , and K 1 -bands , suggesting that the M dwarf companion is indeed responsible for the observed double-spiral-arm pattern .
Our model suggests that the disk is close to face on ( inclination angle \sim 5 degree ) , and that the entire disk-companion system rotates counterclockwise on the sky .
The HDÂ 100453 observations , along with our modeling work , demonstrate that double spiral arm patterns in near-infrared scattered light images can be generically produced by companions , and support future observations to identify the companions responsible for the arms observed in the MWC 758 and SAO 206462 systems .