Abstract
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 H2, 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.
| Original language | English |
|---|---|
| Pages (from-to) | 373-379 |
| Number of pages | 7 |
| Journal | Revista Mexicana de Astronomia y Astrofisica |
| Volume | 60 |
| Issue number | 2 |
| DOIs | |
| State | Published - Oct 2024 |
Bibliographical note
Publisher Copyright:© 2024: Instituto de Astronomía, Universidad Nacional Autónoma de México.
Funding
We thank Peter van-hoof, Kyle Walker, and Krishal Patel for their valuable help. GS acknowledges support from DST/WOS-A/PM-2/2021.
| Funders | Funder number |
|---|---|
| DST/WOS-A/PM | -2/2021 |
Keywords
- astrochemistry
- methods: numerical
- molecular data
- software: simulations
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science