Measuring the primordial gravitational waves from cosmic microwave background and stochastic gravitational wave background observations

Abstract

We constrain the primordial gravitational waves from cosmic microwave background (CMB) and stochastic gravitational wave background (SGWB) observations. SGWB provides the latest way to explore the early universe and the cosmological evolution which can be reflected by primordial gravitational waves. We not only combine LIGO observations with CMB to measure primordial gravitational waves, but also forecast the potential abilities of the LISA detector and PTA projects. In the $\Lambda$CDM+$r$+$n_t$ model, the standard six parameters change slightly from SGWB observations. While the constraints on tensor-to-scalar ratio and tensor spectral index are improved obviously from SGWB observations. FAST projects have a significant impact on tensor-to-scalar ratio and tensor spectral index, namely $r<0.028$ and $n_t=-0.41_{-0.96}^{+0.64}$ at $95\%$ confidence level.

References in corpus (29)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• The 6dF Galaxy Survey: Baryon Acoustic Oscillations and the Local Hubble Constant
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Cosmological Perturbation Theory in the Synchronous vs. Conformal Newtonian Gauge
• Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges
• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
• Science Case for the Einstein Telescope
• An All-Sky Analysis of Polarization in the Microwave Background
• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• Science with the space-based interferometer eLISA. II: Gravitational waves from cosmological phase transitions
• The Five-Hundred-Meter Aperture Spherical Radio Telescope (FAST) Project
• A Probe of Primordial Gravity Waves and Vorticity
• Sensitivity curves for searches for gravitational-wave backgrounds
• The International Pulsar Timing Array: First Data Release
• The Quest for B Modes from Inflationary Gravitational Waves
• Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO's First Observing Run
• A Measurement of the Cosmic Microwave Background B-Mode Polarization Power Spectrum at Sub-Degree Scales with POLARBEAR
• Implications of the NANOGrav results for inflation
• Listening to the sound of dark sector interactions with gravitational wave standard sirens
• Constraints of relic gravitational waves by Pulsar Timing Array: Forecasts for the FAST and SKA projects
• Updated Constraints and Forecasts on Primordial Tensor Modes
• Gravitational waves: Classification, Methods of detection, Sensitivities, and Sources
• Introduction to Microwave Background Polarization
• Observational Constraints on Theories with a Blue Spectrum of Tensor Modes
• Measuring the tilt of primordial gravitational-wave power spectrum from observations
• No evidence for the blue-tilted power spectrum of relic gravitational waves
• Measuring the scalar induced gravitational waves from observations

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