Formation of dust grains in the winds of cool giants, PhD thesis 1992
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| Formato: | Preprint |
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2026
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| _version_ | 1866912993440169984 |
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| author | Dominik, C. |
| author_facet | Dominik, C. |
| contents | Interstellar dust forms during stellar mass-loss events, occurring either during a star's giant phase or during supernova explosions. This PhD thesis provides an in-depth investigation into the theory of dust condensation and growth, specifically applied to the winds of cool giants such as Asymptotic Giant Branch (AGB) stars. The thesis begins with a theoretical description of the chemical reactions that initiate seed formation within a cooling flow. It then details an efficient mechanism - a moment method based on size-weighted moments of the grain size distribution - to compute dust evolution during growth. This theoretical framework is applied to dust-driven winds from carbon-rich AGB stars. By deriving wind equations and self-consistently incorporating dust formation, the research demonstrates that radiation pressure on dust forming in the expanding atmosphere can drive a stellar wind. Furthermore, a parameter study covering the giant region of the Hertzsprung-Russell (HR) diagram is used to derive mass-loss formulas for these winds. The final chapter expands the dust formation theory to investigate the condensation of heterogeneous grains. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_00152 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Formation of dust grains in the winds of cool giants, PhD thesis 1992 Dominik, C. Solar and Stellar Astrophysics Astrophysics of Galaxies Interstellar dust forms during stellar mass-loss events, occurring either during a star's giant phase or during supernova explosions. This PhD thesis provides an in-depth investigation into the theory of dust condensation and growth, specifically applied to the winds of cool giants such as Asymptotic Giant Branch (AGB) stars. The thesis begins with a theoretical description of the chemical reactions that initiate seed formation within a cooling flow. It then details an efficient mechanism - a moment method based on size-weighted moments of the grain size distribution - to compute dust evolution during growth. This theoretical framework is applied to dust-driven winds from carbon-rich AGB stars. By deriving wind equations and self-consistently incorporating dust formation, the research demonstrates that radiation pressure on dust forming in the expanding atmosphere can drive a stellar wind. Furthermore, a parameter study covering the giant region of the Hertzsprung-Russell (HR) diagram is used to derive mass-loss formulas for these winds. The final chapter expands the dust formation theory to investigate the condensation of heterogeneous grains. |
| title | Formation of dust grains in the winds of cool giants, PhD thesis 1992 |
| topic | Solar and Stellar Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2604.00152 |