X-ray Constraints on the Warm-hot Intergalactic Medium

Three observational constraints can be placed on a warm-hot intergalactic medium (WHIM) using ROSAT PSPC pointed and survey data, the emission strength, the energy spectrum, and the fluctuation spectrum. The upper limit to the emission strength of the WHIM is 7.5 ± 1.0 keV s cm sr keV in the 3 4 keV band, an unknown portion of which value may be due to our… CONTINUE READING