: Focuses on whether the observed continuum arc is caused by hydrodynamical gas-dust interactions or the presence of a planet.

: A book listing for " Imperial Mughal Painting " by Cary Welch (Stock ID 121617). A dust arc and non-Keplerian gas kinematics in HD 121617

HD 121617 is a young (approx. 16 million years old) A1V-type star located about 118 parsecs away.