Effects of Baryons and Dissipation on the Matter Power Spectrum

Details Effects of Baryons and Dissipation on the Matter Power Spectrum Effects of Baryons and Dissipation on the Matter Power Spectrum

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.5305r&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #53.05; Bulletin of the American Astronomical Society, V

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Future weak-lensing experiments will measure the matter power spectrum at moderate (k 1 h/Mpc) scales with percent level accuracy, a regime where the influence of dissipational baryon physics becomes important. Cosmological simulations which include the relevent baryonic physics demonstrate that these processes have important effects on the structure of dark matter halos and a measurable effect on the matter power spectrum. We show that the effect on the power spectrum is dominated by the change in the concentration of dark matter halos and this effect must be understood in order to use weak-lensing surveys for constraints on dark-energy.

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