Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002stin...0251190s&link_type=abstract
Technical Report, Smithsonian Astrophysical Observatory Cambridge, MA United States
Astronomy and Astrophysics
Astrophysics
Interstellar Matter, Cosmic Dust, Star Formation, Abundance, Astrophysics, Refractories, Destruction
Scientific paper
Interstellar dust has a profound effect on the structure and evolution of the interstellar medium (ISM) and on the processes by which stars form from it. Dust obscures regions of star formation from view, and the uncertain quantities of elements in dust makes it difficult to measure accurately the abundances of the elements in low density regions. Despite the central importance of dust in astrophysics, we cannot answer some of the most basic questions about it: Why is it that most of the refractory elements are in dust grains? What determines the sizes of interstellar grains? In our theoretical investigations we have addressed these questions by studying the destruction of interstellar grains. We describe here the investigations that we have completed to date. As part of our original proposal we proposed additional projects that have not been completed. We are requesting a no-cost extension to carry out those investigations and describe those in our request.
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