Mathematics – Logic
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21348202c&link_type=abstract
American Astronomical Society, AAS Meeting #213, #482.02; Bulletin of the American Astronomical Society, Vol. 41, p.450
Mathematics
Logic
Scientific paper
Cosmological simulations imply that 50% of the baryonic matter in the Local Universe (z<0.5) resides in a filamentary Warm-Hot Intergalactic Medium (WHIM). The WHIM filaments are intrinsically difficult to detect. The search for observational evidence for the WHIM has only produced statistically limited and/or highly controversial results. The most promising approach to detect and study the WHIM is to search for absorption features from the WHIM in both X-ray and Far UV in the spectra of bright background AGNs.
Success would allow us to address measure Omega(WHIM), and the thermal and enrichment history of the WHIM, that can test models for feedback.
However, deep observations with major observatories (Hubble, Chandra, XMM) are required. This investment requires that target selection be carefully optimized. Here we present the results of a search for optimal targets in both bands. We establish that there is a small of bright targets that it is practical to use for WHIM studies with current X-ray and FUV spectrographs, and a larger database for deeper WHIM studies with future X-ray facilities (IXO, Pharos).
Conciatore Maria Laura
Elvis Martin
Mathur Savita
Nicastro Fabrizio
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