The Abundance of Interstellar Fluorine and Its Implications

Abstract

We report results from a survey of neutral fluorine (F I) in the interstellar medium. Data from the Far Ultraviolet Spectroscopic Explorer (FUSE) were used to analyze 26 lines of sight lying both in the galactic disk and halo, including lines to Wolf-Rayet stars and through known supernova remnants. The equivalent widths of fluorine resonance lines at 951.871 A and 954.827 A were measured or assigned upper limits and combined with a nitrogen curve of growth to obtain F I column densities. These column densities were then used to calculate fluorine depletions. Comparisons are made to the previous study of F I by Federman et al. (2005) and implications for F I formation and depletion are discussed.

32 pages, 10 figures, Accepted to ApJ

References in corpus (10)

• A FUSE Survey of Interstellar Molecular Hydrogen in Translucent Clouds
• The Distribution of Thermal Pressures in the Interstellar Medium from a Survey of C I Fine-Structure Excitation
• Discovery of Interstellar Hydrogen Fluoride
• The chemistry of fluorine-bearing molecules in diffuse and dense interstellar gas clouds
• The Homogeneity of Interstellar Oxygen in the Galactic Disk
• Discovery of Interstellar CF+
• Fluorine Abundances in the Large Magellanic Cloud and Omega Centauri: Evidence for Neutrino Nucleosynthesis?
• Fluorine abundances in planetary nebulae
• FUSE Measurements of Interstellar Fluorine
• Is There Enhanced Depletion of Gas-Phase Nitrogen in Moderately Reddened Lines of Sight?

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