121617 [ HD • FHD ]

: Observations revealed an asymmetric arc that is roughly 40% brighter than the rest of the ring, potentially trapped by gas pressure.

: A foundational study titled "Morphology of the gas-rich debris disk around HD 121617 with SPHERE observations in polarized light" used VLT/SPHERE data to resolve the disk in scattered light. Scientific Profile of HD 121617 121617

Recent research highlights the star as a "hybrid" system between a protoplanetary and a debris disk stage. : Observations revealed an asymmetric arc that is

: A 2018 paper in the Journal of Biomedical Optics regarding "Transvaginal fast-scanning optical-resolution photoacoustic endoscopy" . : A 2018 paper in the Journal of

: Research has identified deviations from standard orbital motion (Keplerian rotation) in the disk's gas kinematics. Other Possible References

: This paper, available on ArXiv and Astronomy & Astrophysics , provides a detailed analysis of a newly discovered "arc" of enhanced dust density within the disk.