Cosmological Parameters from Pre-Planck CMB Measurements
Abstract
Recent data from the WMAP, ACT and SPT experiments provide precise measurements of the cosmic microwave background temperature power spectrum over a wide range of angular scales. The combination of these observations is well fit by the standard, spatially flat LCDM cosmological model, constraining six free parameters to within a few percent. The scalar spectral index, n_s = 0.9690 +/- 0.0089, is less than unity at the 3.6 sigma level, consistent with simple models of inflation. The damping tail of the power spectrum at high resolution, combined with the amplitude of gravitational lensing measured by ACT and SPT, constrains the effective number of relativistic species to be N_eff = 3.28 +/- 0.40, in agreement with the standard model's three species of light neutrinos.
Keywords
Cite
@article{arxiv.1302.1841,
title = {Cosmological Parameters from Pre-Planck CMB Measurements},
author = {Erminia Calabrese and Renée A. Hlozek and Nick Battaglia and Elia S. Battistelli and J. Richard Bond and Jens Chluba and Devin Crichton and Sudeep Das and Mark J. Devlin and Joanna Dunkley and Rolando Dünner and Marzieh Farhang and Megan B. Gralla and Amir Hajian and Mark Halpern and Matthew Hasselfield and Adam D. Hincks and Kent D. Irwin and Arthur Kosowsky and Thibaut Louis and Tobias A. Marriage and Kavilan Moodley and Laura Newburgh and Michael D. Niemack and Michael R. Nolta and Lyman A. Page and Neelima Sehgal and Blake D. Sherwin and Jonathan L. Sievers and Cristóbal Sifón and David N. Spergel and Suzanne T. Staggs and Eric R. Switzer and Edward J. Wollack},
journal= {arXiv preprint arXiv:1302.1841},
year = {2015}
}
Comments
5 pages, 4 figures