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.
Cite
@article{arxiv.astro-ph/0410362,
title = {FUSE Measurements of Interstellar Fluorine},
author = {S. R. Federman and Yaron Sheffer and David L. Lambert and V. V. Smith},
journal= {arXiv preprint arXiv:astro-ph/0410362},
year = {2009}
}
Comments
17 pages, 4 figures, accepted for publication in ApJ