Chemistry of Interstellar Dust

Details Chemistry of Interstellar Dust Chemistry of Interstellar Dust

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..241p&link_type=abstract

Chandra Proposal ID #01400007

Computer Science

Chandra Proposal Id #01400007

Scientific paper

We propose to use Cyg X-2 as a bright 'candle' behind a sufficient dense column of interstellar matter in order to study absorption and scattering effects. Energy resolved scattering halos provide a clue to the chemistry of interstellar dust including the question if grains have a Silicate core and an organic mantle. Since haloes are not completely observable with a dispersive instrument, we will use the brightness distribution in cross dispersion direction for measuring the energy dependent scattering cross section. Cyg X-2 is the brightest among reasonably absorbed sources (NH > 10**21 cm**-2). We expect about 18 cts/s with HRC-S + LETG more than 500.000 cts within a 30ksec observation, respectively.

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