Limits on the gravity wave contribution to microwave anisotropies
arXiv:astro-ph/9901028 · doi:10.1103/PhysRevD.60.123513
Abstract
We present limits on the fraction of large angle microwave anisotropies which could come from tensor perturbations. We use the COBE results as well as smaller scale CMB observations, measurements of galaxy correlations, abundances of galaxy clusters, and Lyman alpha absorption cloud statistics. Our aim is to provide conservative limits on the tensor-to-scalar ratio for standard inflationary models. For power-law inflation, for example, we find T/S<0.52 at 95% confidence, with a similar constraint for phi^p potentials. However, for models with tensor amplitude unrelated to the scalar spectral index it is still currently possible to have T/S>1.
23 pages, 7 figures, accepted for publication in Phys. Rev. D. Calculations extended to blue spectral index, Fig. 6 added, discussion of results expanded
References in corpus (23)
- Particle Physics Models of Inflation and the Cosmological Density Perturbation
- Gravitational Lensing Effect on Cosmic Microwave Background Polarization
- A CMB Polarization Primer
- CMB Anisotropies: Total Angular Momentum Method
- Estimating the Power Spectrum of the Cosmic Microwave Background
- Microwave Background Constraints on Cosmological Parameters
- The Power Spectrum of Mass Fluctuations Measured from the Lyman-alpha Forest at Redshift z=2.5
- Galaxy Cluster Abundance Evolution and Cosmological Parameters
- Galaxy clusters at 0.3 < z < 0.4 and the value of Ω_0
- Cosmic microwave background measurements can discriminate among inflation models
- Constraints on the Effects of Locally-biased Galaxy Formation
- Results from the High-Z Supernova Search Team
- Detectability of Inflationary Gravitational Waves with Microwave Background Polarization
- Constraining Inflation with Cosmic Microwave Background Polarization
- Cosmological constraints from current CMB and SN 1a data: a brute force 8 parameter analysis
- The Imprint of Gravitational Waves in Models Dominated by a Dynamical Cosmic Scalar Field
- The Age of the Universe
- The Gravitational-Wave contribution to the CMB anisotropies
- The Spectrum of Gravitational Wave Perturbations in the One-Bubble Open Inflationary Universe
- Primordial Gravitational Waves From Open Inflation
- Tensor Anisotropies in an Open Universe
- The First Space-Based Gravitational-Wave Detectors
- Large primordial gravitational wave background in a class of BSI Lambda-CDM models