Large Area X-ray Spectroscopy Mission

Details Large Area X-ray Spectroscopy Mission Large Area X-ray Spectroscopy Mission

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.7117t&link_type=abstract

American Astronomical Society, 187th AAS Meeting, #71.17; Bulletin of the American Astronomical Society, Vol. 27, p.1386

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Scientific paper

We are studying a Large Area X-ray Spectroscopy Mission conceived and sized to address a range of fundamental astrophysical questions such as: - the role of flares and microflares in heating stellar coronae - the impact of metallicity on the Eddington limit in accreting binaries - the enrichment of the interstellar and intracluster medium - the formation of galaxies from cooling cluster gas, and - the nature of the environment around quasars and other AGNs. The essence of our concept is to build six identical modest satellites, each carrying a highly packed assembly of replicated mirror shells and X-ray spectrometers, launched into a solar, drift-away orbit (similar to that studied for the SIRTF program). We envision a large collecting area ( ~ 3.3 sq. m around 1 keV), and a relatively high spectral resolution (E/Delta E ~ 800 at 20 Angstroms) with the ability to study extended sources (up to 1' or 2') as well as point-like objects. The proposed approach resonates extraordinarily well with NASA's strategy for the future. The program distributes risk over several launches using a number of small, lightweight, inexpensive satellites to achieve the required large area and scientific sensitivity. The development time is relatively short - 3 years from program start to first launch, with subsequent launches every 4-6 months. The relatively benign, solar orbit supports very simple operational scenarios and safe modes, and is conducive to long life (> 5 years). We anticipate widespread community involvement through use of the World-Wide-Web to disseminate information and exchange ideas, as part of an open process which will also include workshops to refine the scientific objectives and technical approach.

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