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Table of contents
1 Introduction
1.1 Young stellar Objects
1.1.1 Star formation in a nutshell
1.1.2 Young stellar objects classification
1.2 Disk properties
1.2.1 Material distribution
1.2.2 Temperature distribution
1.2.3 Disk opacity
1.3 Dust dynamics and planet formation
1.4 PPDs: a silicate-rich composition in solids
1.5 Carbon-based species
1.5.1 Dust models
1.5.2 Origin of the carbonaceous material
1.5.3 Solid carbonaceous species and their spectral features
1.6 Why studying Carbon in PPDs?
2 Mid-infrared Interferometry with MATISSE
2.1 History of mid-infrared interferometry
2.2 Theoretical principles of interferometry
2.2.1 Main functions of an interferometer
2.3 MATISSE
2.3.1 Presentation
2.3.2 Instrumental design and optical train
2.3.3 Signal encoding
2.3.4 Dealing with the thermal background
2.3.5 Observing sequence
2.3.6 Data reduction
2.3.7 What does a MATISSE observer do?
2.3.8 MATISSE performances
3 Telluric lines
3.1 Atmospheric transmission
3.2 Efect of telluric lines on raw MATISSE data
3.3 Efect of water vapour on the calibrated MATISSE data
3.4 Molecfit – a telluric absorption correction tool
4 Interferometric models and minimization methods
4.1 Geometric approach
4.2 Temperature-gradient modeling
4.2.1 Theoretical aspects of temperature-gradient models
4.2.2 Vertical temperature-gradient
4.2.3 Temperature-gradient model parameters and observables
4.2.4 Feature emitting component
4.2.5 Asymmetry modeling
4.3 Model fitting with MCMC
5 Case of HD 179218: results and discussion
5.1 HD 179218
5.2 Observations of HD 179218
5.2.1 MATISSE data
5.2.2 MIDI data
5.2.3 PIONIER data
5.3 Qualitative analysis
5.3.1 Interferometric observables
5.3.2 Photometric observations
5.4 Modeling and results
5.4.1 Geometric modeling and results complementary to the article Kokoulina et al. (2021)
5.4.2 Temperature-gradient modeling and results
5.5 Parameter sensitivity analysis
5.6 Brand new MATISSE observations
6 Conclusion and perspectives
7 Appendix
7.1 Observation log of the January run: 2021.01.16–01.28
7.2 Data reduction and observables
7.3 Calculation of the radial optical depth
