Volume 375, Number 2, August IV 2001
|Page(s)||584 - 590|
|Published online||15 August 2001|
Interstellar extinction by composite grains
Gujarat College, Ahmedabad 380009, India e-mail: firstname.lastname@example.org
2 IUCAA, Post Bag 4, Ganeshkhind, Pune 411007, India
3 Dept. of Physics, Dalhousie University, Halifax, Nova Scotia, B3H 3J5 Canada
Corresponding author: R. Gupta, email@example.com
Accepted: 14 June 2001
Recent studies indicate that interstellar grains are composites of very small individual particles of silicates and carbon glued together into an aggregate. Using the discrete dipole approximation (DDA), we calculate the extinction, scattering and absorption efficiencies for composite grains assumed to be made of a host silicate sphere with embedded graphite inclusions. In particular, we study the extinction as a function of inclusion size and volume fraction. Using the extinction efficiencies of these composite grains, we evaluate the interstellar extinction curve in the wavelength region of .
Key words: ISM: dust, extinction
© ESO, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.