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Selected Works

2007

Ricardo Flores

Articles 1 - 1 of 1

Full-Text Articles in Physics

The Shape Of Galaxy Cluster Dark Matter Haloes: Systematics Of Its Imprint On Cluster Gas And Comparison To Observations, Ricardo A. Flores, Brandon Allgood, Andrey V. Kravtsov, Joel R. Primack, David A. Buote, James S. Bullock May 2007

The Shape Of Galaxy Cluster Dark Matter Haloes: Systematics Of Its Imprint On Cluster Gas And Comparison To Observations, Ricardo A. Flores, Brandon Allgood, Andrey V. Kravtsov, Joel R. Primack, David A. Buote, James S. Bullock

Ricardo Flores

We study predictions for galaxy cluster observables that can test the statistics of dark matter halo shapes expected in a flat Λ cold dark matter (CDM) universe. We present a simple analytical model for the prediction of cluster-scale X-ray observations, approximating clusters as isothermal systems in hydrostatic equilibrium, and dark matter haloes as ellipsoids with uniform axial ratios (homeoidal ellipsoids). We test the model against high-resolution, hydrodynamic cluster simulations to gauge its reliability. We find that this simple prescription does a good job of predicting cluster X-ray ellipticities compared to the simulations as long as one focuses on cluster regions ...