Poster
| Résumé
: The
Cosmic Shear Power Spectrum (CSPS) probes
the growth and distribution of matter
using the deflection of light by the web
of large scale structure in the universe .
Future and ongoing surveys such as DES,
LSST and EUCLID will measure the CSPS at
angular scales as small as an arcminute.
In order to interpret the results and
compute the cosmological parameters we
need accurate prediction of the 3D matter
power spectrum at non-linear scales. We
will describe our approach based on the
Coyote Universe Emulator that has been
shown to predict the three dimensional
dark matter power spectrum to percent
level accuracy down to the non-linear
scales relevant for lensing. Small scales
are also dominated by baryonic matter
which are not captured in N-body gravity
only simulations. We will also explore
modeling baryons using semi-analytic
approaches and the corresponding biases in
the Shear Power Spectrum. |
Bibliographie
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