Abstract
Combining measurements of the galaxy power spectrum and the cosmic microwave background (CMB) is a powerful means of constraining the summed mass of neutrino species Σmv, but is subject to systematic uncertainties due to non-linear structure formation, redshift-space distortions and galaxy bias. We empirically test the robustness of neutrino mass results to these effects by separately analyzing power spectra of red and blue galaxies from the Sloan Digital Sky Survey (SDSS-II) Data Release 7 (DR7), combined with the CMB five-year Wilkinson Microwave Anisotropy Probe (WMAP5) data. The between upper limits on neutrino mass for red and blue galaxies is approximately 1σ from the value expected from mock catalogs for most models and k ranges tested. This indicates good agreement for current data but hints at possible issues for nextgeneration surveys. More details are available in [1].
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