FUSE Measurements of Interstellar Fluorine

Details FUSE Measurements of Interstellar Fluorine FUSE Measurements of Interstellar Fluorine

2004-10-14

arxiv.org/abs/astro-ph/0410362v1

Astrophys.J.619:884,2005

Astronomy and Astrophysics

Astrophysics

17 pages, 4 figures, accepted for publication in ApJ

Scientific paper

10.1086/426778

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.

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