Cosmic Complementarity: H_{0} and Ω_{m} from Combining Cosmic Microwave Background Experiments and Redshift Surveys
Abstract
We show that the detection of acoustic oscillations in both upcoming cosmic microwave background (CMB) satellite experiments and largeredshift surveys can yield 5% determinations of H_{0} and Ω_{m}, an orderofmagnitude improvement over CMB data alone. CMB anisotropies provide the sound horizon at recombination as a standard ruler. For reasonable baryon fractions, this scale is imprinted on the galaxy power spectrum as a series of spectral features. Measuring these features in redshift space determines the Hubble constant, which in turn yields Ω_{m} once combined with CMB data. Since the oscillations in both power spectra are frozenin at recombination, this test is insensitive to lowredshift cosmology.
 Publication:

The Astrophysical Journal
 Pub Date:
 September 1998
 DOI:
 10.1086/311582
 arXiv:
 arXiv:astroph/9805239
 Bibcode:
 1998ApJ...504L..57E
 Keywords:

 COSMOLOGY: THEORY;
 COSMOLOGY: DARK MATTER;
 COSMOLOGY: LARGESCALE STRUCTURE OF UNIVERSE;
 COSMOLOGY: COSMIC MICROWAVE BACKGROUND;
 Cosmology: Cosmic Microwave Background;
 Cosmology: Theory;
 Cosmology: Dark Matter;
 Cosmology: LargeScale Structure of Universe;
 Astrophysics
 EPrint:
 4 pages, LaTeX, 2 Postscript figures