Recent Update of Gas-Phase Chemical Reactions and Molecular Lines of TiO in Cloudy
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866917737623715840 |
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| author | Shaw, Gargi Ferland, Gary J. Stancil, Phillip Porter, Ryan |
| author_facet | Shaw, Gargi Ferland, Gary J. Stancil, Phillip Porter, Ryan |
| contents | We present our current update on the gas-phase chemical reactions and spectral lines of TiO in the spectral synthesis code Cloudy. For this purpose, we have added 229 Ti-related reactions in the chemical network. In addition, we consider 230 fine-structure energy levels, the corresponding 223 radiative transitions, and 444 collisional transitions with ortho and para H$_2$ and predict 66 TiO lines. We perform spectroscopic simulations of TiO emission from the circumstellar region of the oxygen-rich red supergiant VY Canis Majoris to validate our update. Our model reproduces the observed TiO column density. This update is helpful in modeling dust-free astrophysical environments where Ti is in the gas phase and TiO can form. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_20972 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Recent Update of Gas-Phase Chemical Reactions and Molecular Lines of TiO in Cloudy Shaw, Gargi Ferland, Gary J. Stancil, Phillip Porter, Ryan Astrophysics of Galaxies We present our current update on the gas-phase chemical reactions and spectral lines of TiO in the spectral synthesis code Cloudy. For this purpose, we have added 229 Ti-related reactions in the chemical network. In addition, we consider 230 fine-structure energy levels, the corresponding 223 radiative transitions, and 444 collisional transitions with ortho and para H$_2$ and predict 66 TiO lines. We perform spectroscopic simulations of TiO emission from the circumstellar region of the oxygen-rich red supergiant VY Canis Majoris to validate our update. Our model reproduces the observed TiO column density. This update is helpful in modeling dust-free astrophysical environments where Ti is in the gas phase and TiO can form. |
| title | Recent Update of Gas-Phase Chemical Reactions and Molecular Lines of TiO in Cloudy |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2407.20972 |