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Confusion of Diffuse Objects in the X-ray Sky
G. Mark Voit, August E. Evrard, Greg L. Bryan
Most of the baryons in the present-day universe are thought to reside in intergalactic space at temperatures of 10^5-10^7 K. X-ray emission from these baryons contributes a modest…
Metal Enrichment and Temperature of the Intergalactic Medium
Renyue Cen, Greg L. Bryan
Hydrodynamic simulations of Lyman alpha clouds based on ab inito cosmological models have produced results that are in broad agreement with observations. However, further analyses…
Explaining the entropy excess in clusters and groups of galaxies without additional heating
Greg L. Bryan
The X-ray luminosity and temperature of clusters and groups of galaxies do not scale in a self-similar manner. This has often been interpreted as a sign that the intracluster mediu…
Baryons in the Warm-Hot Intergalactic Medium
Romeel Davé, Renyue Cen, Jeremiah P. Ostriker +6
Approximately 30-40% of all baryons in the present day universe reside in a warm-hot intergalactic medium (WHIM), with temperatures between 10^5<T<10^7 K. This is a generic predict…
Simulations of Pregalactic Structure Formation with Radiative Feedback
Marie E. Machacek, Greg L. Bryan, Tom Abel
We present results from three-dimensional hydrodynamic simulations of the high redshift collapse of pregalactic clouds including feedback effects from a soft H2 photodissociating U…
First Structure Formation and the First Stars
Michael L. Norman, Tom Abel, Greg Bryan
We discuss the results of recent 3D simulations of first structure formation in relationship to the formation of the first stars. On the basis of a new, high-resolution AMR simulat…