Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21933808c&link_type=abstract
American Astronomical Society, AAS Meeting #219, #338.08
Astronomy and Astrophysics
Astronomy
Scientific paper
We describe a code that harnesses the power of massively parallel GPU (graphical processing unit) computers to generate spatially resolved spectra of triaxial galaxy clusters. Using a self-consistent approach, and given a triaxial dark matter distribution in equilibrium with a hot plasma halo, the code solves the hydrostatic equilibrium equation. The resulting temperature profile is inserted into the emissivity function, and the spectra are co-added on a pixel-by-pixel basis to generate model spectra suitable for any X-ray mission. Each pixel on the detector runs as a separate thread on the GPU, and thousands of simultaneous threads are run to interpolate the cooling function and generate 3D spectra that are then co-added onto a 2D plane. The target architecture---Fermi Tesla Nvidia GPU---results in speed improvements of a factor between 10 and 100 over a typical clustered CPU-only setup.
Chapman Tyler
Smith Jeffrey J.
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