FUSE Measurements of Interstellar Fluorine

Abstract

The source of fluorine is not well understood, although core-collapse supernovae, Wolf-Rayet stars, and asymptotic giant branch stars have been suggested. A search for evidence of the nu process during Type II supernovae is presented. Absorption from interstellar F I is seen in spectra of HD 208440 and HD 209339A acquired with the Far Ultraviolet Spectroscopic Explorer. In order to extract the column density for F I from the line at 954 A, absorption from H2 has to be modeled and then removed. Our analysis indicates that for H2 column densities less than about 3 x 10^20 cm^-2, the amount of F I can be determined from lambda 954. For these two sight lines, there is no clear indication for enhanced F abundances resulting from the nu process in a region shaped by past supernovae.

arXiv comment17 pages, 4 figures, accepted for publication in ApJ

References in corpus (9)

• The 'Forbidden' Abundance of Oxygen in the Sun
• Galactic Chemical Evolution: Hydrogen Through Zinc
• The Definitive Abundance of Interstellar Oxygen
• The Abundance of Interstellar Nitrogen
• Discovery of Interstellar Hydrogen Fluoride
• The Homogeneity of Interstellar Oxygen in the Galactic Disk
• Fluorine Abundances in the Large Magellanic Cloud and Omega Centauri: Evidence for Neutrino Nucleosynthesis?
• Cloud Structure and Physical Conditions in Star-forming Regions from Optical Observations. I. Data and Component Structure
• An Ultra-High-Resolution Survey of the Interstellar ^7Li-to-^6Li Isotope Ratio in the Solar Neighborhood

Cited by in corpus (29)

• The Dawes Review 2: Nucleosynthesis and stellar yields of low and intermediate-mass single stars
• Polycylcic Aromatic Hydrocarbons (PAH's) in dense cloud chemistry
• Ultraviolet Survey of CO and H_2 in Diffuse Molecular Clouds: The Reflection of Two Photochemistry Regimes in Abundance Relationships
• The chemistry of fluorine-bearing molecules in diffuse and dense interstellar gas clouds
• Fluorine and Sodium in C-rich low-metallicity stars
• The thermonuclear production of F19 by Wolf-Rayet stars revisited
• Fluorine in AGB Carbon Stars Revisited
• Fluorine abundances in planetary nebulae
• Effects of nuclear cross sections on ${}^{19}$F nucleosynthesis at low metallicities
• The Abundance of Interstellar Fluorine and Its Implications
• Fluorine in the solar neighborhood - is it all produced in AGB-stars?
• A new solar fluorine abundance and a fluorine determination in the two open clusters M 67 and NGC 6404
• Fluorine Abundances in the Orion Nebula Cluster
• Direct Determination of the HF/H2 Abundance Ratio in Interstellar Gas
• The impact of the 18F(a,p)21Ne reaction on asymptotic giant branch nucleosynthesis
• Discovery of Fluorine in Cool Extreme Helium Stars
• Fluorine abundances in dwarf stars of the solar neighbourhood
• Measurement of 1323 and 1487 keV resonances in 15N(α, γ)19F with the recoil separator ERNA
• Solar System Abundances and Condensation Temperatures of the Halogens Fluorine, Chlorine, Bromine, and Iodine
• Revisiting the Chlorine Abundance in Diffuse Interstellar Clouds from Measurements with the Copernicus Satellite
• Constraining $\nu$-Process Production of Fluorine through Cosmic Ray Nucleosynthesis
• The fluorine abundance in a Galactic Bulge AGB star measured from CRIRES spectra
• The Abundance of Boron in Diffuse Interstellar Clouds
• Fluorine Abundances in the Galactic Nuclear Star Cluster
• First detection of AlF line emission towards M-type AGB stars
• The Nucleosynthesis and Reaction Rates of Fluorine 19 (${}^{19}F$) in the Sun
• A Reexamination of Phosphorus and Chlorine Depletions in the Diffuse Interstellar Medium
• First detection of CF${}^{+}$ in the Large Magellanic Cloud
• The impact of the 18F(a,p)21Ne reaction on fluorine production in AGB stars