A companion in V1247 Ori supported by motion in the pattern of the spiral arm

Open Access

Fig. A.1.

Peak locations of spiral arm S1 (full arm) in polar coordinates after correction for viewing geometry. The solid curves represent the best-fit model spiral for the peak locations (dots) between 2018 and 2023 (t = 4.84 yr), assuming the companion-driven scenario. The derived angular velocities of the motion of the spiral pattern are yr⁻¹.

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