Work

Far Ultraviolet Spectroscopic ExplorerMeasurements of Interstellar Fluorine

Year: 2005

Type: article

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 ν-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 Å, absorption from H 2 has to be modeled and then removed. Our analysis indicates that for H 2 column densities less than about 3 × 10 20 cm -2 , the amount of F I can be determined from λ954. For these two sight lines, there is no clear indication for enhanced F abundances resulting from the ν-process in a region shaped by past supernovae.

Source: The Astrophysical Journal

DOI: 10.1086/426778

Authors: S. R. Federman, Yaron Sheffer, David L. Lambert, V. V. Smith

Institutions: University of Toledo, McDonald Observatory, The University of Texas at Austin, The University of Texas at El Paso

Language: English

Topic: Astrophysics and Star Formation Studies

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: National Aeronautics and Space Administration, Johns Hopkins University, Centre National d’Etudes Spatiales

Award: G189876248