A High-Resolution Study of Interstellar Absorption

Computer Science

Scientific paper

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Chandra Proposal Id #07910330

Scientific paper

We propose to study the interstellar medium (ISM) absorption features in the HETG spectrum of the bright X-ray source in the globular cluster NGC 6624. The resolution of the HETG will allow us to resolve the absorption edge structure from neutral, atomic oxygen, iron, and neon and search for signatures of molecular compounds (i.e. dust) in the ISM. We will also measure the strength of absorption lines from singly and doubly ionized oxygen and neon, which can be used to understand the warm, ionized phase of the ISM. In addition, this target will allow us to compare our X-ray derived results with multi-wavelength studies of the ISM, including ultraviolet measurements of the neutral hydrogen column and radio measurements of the dispersion to the cluster.

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