High Resolution Studies of Interstellar Absorption with Cyg X-2

Details High Resolution Studies of Interstellar Absorption with Cyg X-2 High Resolution Studies of Interstellar Absorption with Cyg X-2

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2252c&link_type=abstract

Chandra Proposal ID #08910048

Physics

Chandra Proposal Id #08910048

Scientific paper

Recent studies have shown that a significant fraction of the interstellar medium (ISM) is ionized. High resolution studies of various bright X-ray binaries showed X-ray absorption features of the cool, warm, and hot ISM phases. We want re-visit the X-ray binary Cyg X-2 in a long cc-mode exposure for its bright soft X-ray spectrum as well as its location with respect to the Galactic plane. We plan to resolve the full fine structure of absorption near the O K, Fe L, and Ne K edges. In addition we will detect highly ionized lines not only at Ne, as previously done, but now also at O through the enhanced sensitivity of our observation. This allows us to determine ionization fractions for O and Ne at all phases as well as determine relative ionized abundances at high galactic lattitude.

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