Determine whether hydrodynamical models can jointly reproduce the GG Tau A observations

Determine whether hydrodynamical models of the GG Tau A circumtriple disk can simultaneously reproduce the stellar astrometry, the observed cavity size, and the disk morphology over timescales comparable to the system’s age.

Background

GG Tau A was historically interpreted as a binary, but the discovery of the close Ab1–Ab2 pair established it as a hierarchical triple. The large inner cavity of the circumtriple disk has been difficult to explain using binary models, and published hydrodynamical simulations have explored coplanar and misaligned configurations.

The paper states that recent models still do not reproduce all relevant observables simultaneously. Resolving this issue requires dynamical modeling that incorporates the self-consistent inner and wide stellar orbits derived in the present analysis.