The Xenia Mission And The Missing Baryons

Details The Xenia Mission And The Missing Baryons The Xenia Mission And The Missing Baryons

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.0610p&link_type=abstract

American Astronomical Society, HEAD meeting #11, #6.10; Bulletin of the American Astronomical Society, Vol. 41, p.659

Physics

Optics

1

Scientific paper

Reconstructing the cosmic history of metals, from the first population of stars to the processes involved in the formation of galaxies and clusters of galaxies, is a key observational challenge. Most baryons reside in diffuse structures, in proto-galaxies and clusters of galaxies, and are predicted to trace the vast filamentary structures created by the ubiquitous Dark Matter. X-ray spectroscopy of diffuse matter has the unique capability of simultaneously probing a broad range of elements , C through Fe - in all their ionization stages and all binding states. A medium- size mission, Xenia - proposed to the ASTRO2010 Decadal Survey - will combine cryogenic imaging spectrometers and wide field X-ray optics with fast repointing to collect essential information from three major tracers of metals throughout the evolution of the Universe, from the early epoch to the present era: Gamma Ray Burst, Galaxy Clusters, and the Warm Hot Intergalactic Medium. Here we will describe in more detail the unique capabilities of Xenia for the WHIM.

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