1. Introduction

2. Observations

3. Dust radiative transfer modeling
3.1. RADMC-3D
3.2. Grid
3.3. Dust opacity & temperature
3.4. Dust envelope model
3.5. Envelope temperature structure

4. Dust density structures of IRAS 16293
4.1. Disk component model constraints
4.2. Dust filament
4.3. Disk component models
4.4. Model analysis

5. Gas line emission modeling
5.1. Abundance modeling
5.2. Modeled CO isotopologue maps

6. Discussion

7. Conclusions