8th HEAD Meeting, 8-11 September, 2004
Session 2 Galaxy Clusters and the Intergalactic Medium
Poster, Wednesday, September 8, 2004, 9:00am-10:00pm

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[2.23] Peering Through the Sheets: Characterizing the WHIM

L. A. Phillips (Caltech)

We present an new algorithm to ferret out and extract structures in large scale simulations. It is used to cull a well-defined sample of sheets, filaments and groups from simulations in order to study the warm/hot intergalactic medium (WHIM). The entropy, density profile and temperature distribution of the gas in these structures are obtained. We describe the predicted temperature-density phase diagram for the intergalactic medium and derive an `equation of state' for the WHIM. In order to obtain a better understanding of the physical properties and extent of the WHIM, we progress beyond a threshold-based definition of this component to look at the topology and geometry of this potentially substantial baryon reservoir.

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Bulletin of the American Astronomical Society, 36 #3
© 2004. The American Astronomical Soceity.