Physics – Optics
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ngxo.conf..227b&link_type=abstract
The Next Generation of X-Ray Observatories, p. 227
Physics
Optics
X Ray Astronomy, Astronomical Observatories, Space Missions, Mission Planning, Radio Telescopes, Imaging Techniques, X Ray Spectroscopy, Spectral Resolution, Spatial Resolution, X Ray Diffraction, X Ray Optics
Scientific paper
Without any doubt, observatories in the X ray band have become a major diagnostic tool in modern astrophysics research. Several presentations at this workshop have highlighted the importance and impact of X ray observations on virtually every conceivable type of astronomical object (recall the ROSAT detections of X rays from comets). A few, more or less randomly picked, examples to demonstrate the breadth of this diagnostic are: -heating and ion/electron temperature equilibration processes in strong, SN-induced, collisionless shocks. -physical interplay between accretion flow and the surface (or event horizon) of degenerate objects. -potential linkage between Seyfert 1 and Seyfert 2 type active galactic nuclei. -evolution of heavy element abundance in intracluster media. It is obvious that substantial progress in all these fields (and others) will be made with the upcoming generation of X ray observatories AXAF (1998), XMM (1999) and Astro-E (2000). For this reason, it is now not so straightforward to reach beyond those, and to advocate a strong NGXO case: to a certain extent we suffer from the "embarrassment of riches". Nevertheless, it is already quite important that we attempt this outreach now for two main reasons: -The next quantum leap in X ray throughput, the equivalent of the presently most "massive" optical or single-dish radio telescopes, still requires a major development in lightweight "conventional" grazing incidence optics. -Fundamentally new approaches to X ray imaging and/or spectroscopy have at least another five to ten years of research and development ahead of them before they are sufficiently mature to be seriously considered for application in a major world-class space facility.
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