ACCRETION DISKS AROUND T-TAURI STARS .3. A CHI-2 ANALYSIS OF DISK PARAMETERS

We present a new method for modelling the spectral energy distribution of T Tauri stars (TTS). The accretion disk model developed in previous papers is used to compute synthetic energy distributions that are compared to observed ones. The disk parameters that yield the best synthetic fits to observations are found by applying an automated method which explores the parameter space in a non-random way. An application of this method to the energy distribution of DF Tau is presented and the topology of the parameter space is examined in order to fully address the issue of the uniqueness of disk properties. Implications for derived TTS disk properties are discussed, and additional constraints on the disk models are suggested.