Astronomy and Astrophysics – Astronomy
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.7903s&link_type=abstract
American Astronomical Society Meeting 210, #79.03; Bulletin of the American Astronomical Society, Vol. 39, p.187
Astronomy and Astrophysics
Astronomy
Scientific paper
We use abundance constraints derived from archival GHRS and STIS data to relate directly extinction to specific grain types. This is the first attempt to constrain dust models with extinction curves and full complements of important abundances in individual sight lines. To this point, averaged interstellar abundances have been used to constrain models of dust and their resulting extinction effects. By using average abundances, any details concerning the relationship between the grain composition and extinction is lost. Our study includes seven sight lines where all of the most abundant elements in dust, C, O, Si, Mg, and Fe, have been observed, and where extinction curves are measured. We explore the role of iron oxides as well as silicates and carbon-based grains in producing extinction toward these stars.
This research is supported by the Space Telescope Science Institute grant HST-AR-10979.01 to Whitman College.
Sofia Ulysses John
Wolff Mike J.
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