Assessement of Interstellar Depletions Through X-Ray Absorption and Scattering by Dust

Details Assessement of Interstellar Depletions Through X-Ray Absorption and Scattering by Dust Assessement of Interstellar Depletions Through X-Ray Absorption and Scattering by Dust

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..161s&link_type=abstract

Chandra Proposal ID #01100814

Computer Science

Chandra Proposal Id #01100814

Scientific paper

We propose to obtain AXAF/LETGS spectra of K- and L-shell absorption edges and scattering halos due to dust along the line of sight to X Persei. These data, along with our existing HST/GHRS results on gas in the same line of sight, will provide direct information on grain composition and sizes. The combination of AXAF and HST data will provide new insights into depletions (independent of any assume "cosmic" abundances), and will provide important new constraints on models for the dust as well as the relationship between stellar and ISM compositions. X Per is a reddened power-law source with a steep high-energy cut-off, making it an ideal candidate (with minimal confusion due to high spectral orders), with sufficient flux to achieve S/N of about 25 in 50 ksec.

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