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19 April 2024 |
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FUSE Measurements of Interstellar Fluorine | | S.R. Federman
; Yaron Sheffer
; David L. Lambert
; V.V. Smith
; | | Date: |
15 Oct 2004 | | Subject: | astro-ph | | Affiliation: | U. Toledo), Yaron Sheffer (U. Toledo), David L. Lambert (U. Texas), and V.V. Smith (UTEP | | 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. | | Source: | arXiv, astro-ph/0410362 | | Services: | Forum | Review | PDF | Favorites | |
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