Dark Energy Reflections in the Redshift-Space Quadrupole

Details Dark Energy Reflections in the Redshift-Space Quadrupole Dark Energy Reflections in the Redshift-Space Quadrupole

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jkas...38..175n&link_type=abstract

Journal of the Korean Astronomical Society, vol. 38, no. 2, pp. 175-178

Mathematics

Logic

Cosmological Parameters, Cosmology: Theory, Galaxies: Distances And Redshifts, Large-Scale Structure Of Universe, Methods: Analytical

Scientific paper

We show that next-generation galaxy surveys such as KAOS (the Kilo-Aperture Optical Spectrograph)will constrain dark energy even if the baryon oscillations are missing from the monopole power spectrum and the bias is scale- and time-dependent. KAOS will accurately measure the quadrupole power spectrum which gives the leading anisotropies in the power spectrum in redshift space due to peculiar velocities, the finger of God effect, as well as the Alcock-Paczynski effect. The combination of monopole and quadrupole power spectra powerfully breaks the degeneracy between the bias parameters and dark energy and, in the complete absence of baryon oscillations (Ωb=0), leads to a roughly 500% improvement in constraints on dark energy compared with the monopole spectrum alone. As a result, for KAOS the worst case with no oscillations has dark energy errors only mildly degraded relative to the ideal case, providing insurance on the robustness of KAOS constraints on dark energy. We show that nonlinear effects are crucial in correctly evaluating the quadrupole and significantly improving the constraints on dark energy when we allow for multi-parameter scale-dependent bias.

Affiliated with

Also associated with

No associations

Rating

Dark Energy Reflections in the Redshift-Space Quadrupole does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dark Energy Reflections in the Redshift-Space Quadrupole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dark Energy Reflections in the Redshift-Space Quadrupole will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1399369