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| Paper: |
The Role of AGB Stars in the Cosmic Fluorine Production |
| Volume: |
497, Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time |
| Page: |
269 |
| Authors: |
Jönsson, H.; Ryde, N.; Harper, G. M.; Richter, M. J.; Hinkle, K. H. |
| Abstract: |
The cosmic origin of fluorine has not been established. Production of fluorine has been observationally proven in AGB stars, but it is uncertain if the amount of fluorine produced can explain the cosmic abundance. Over the years there have been claims both for and against AGB stars being the dominant fluorine producer in the Galaxy. Other proposed production sites are Wolf-Rayet stars and supernovae of Type II via the ν-process. The molecular data for the HF molecule which are used for fluorine abundance determination have never been properly published and are most likely incorrectly used in several earlier works, leading to ∼0.3 dex too high fluorine abundance. Here, we present an ongoing project with the goal of constraining the possible production sites of fluorine and in particular the role of the AGB stars. The project includes several observational data sets of different stellar populations, calculations of molecular data, and galactic chemical evolution modelling. In particular we focus on a recently published article where we draw the conclusion that all the cosmic fluorine in the solar neighborhood was probably created in AGB stars (Jönsson et al. 2014b). |
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