Revisit relic gravitational waves based on the latest CMB observations

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	Revisit relic gravitational waves based on the latest CMB observations
	Tong, Minglei
	2012
发表期刊	CLASSICAL AND QUANTUM GRAVITY
ISSN	0264-9381
卷号	29 期号:15
摘要	According to the CMB observations, Mielczarek (2011 Phys. Rev. D 83 023502) evaluated the reheating temperature, which could help to determine the history of the Universe. In this paper, we recalculate the reheating temperature using the new data from the Wilkinson Microwave Anisotropy Probe seven-year observations. Based on that, we list the approximate solutions of relic gravitational waves (RGWs) for various frequency bands. With the combination of the quantum normalization of RGWs when they are produced and the CMB observations, we obtain the relation between the tensor-to-scalar ratio r and the inflation index beta for a given scalar spectral index n(s). As a comparison, the diagram r - beta in the slow-roll inflation model is also given. Thus, the observational limits of r from CMB lead to the constraints on the value of beta. Then, we illustrate the energy density spectrum of RGWs with the quantum normalization for different values of r and the corresponding beta. For comparison, the energy density spectra of RGWs with parameters based on slow-roll inflation are also discussed. We find that the values of n(s) affect the spectra of RGWs sensitively in the very high frequencies. Based on the current and planned gravitational wave detectors, we discuss the detectabilities of RGWs.
部门归属	守时理论与方法研究室
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/4760
专题	守时理论与方法研究室
推荐引用方式 GB/T 7714	Tong, Minglei. Revisit relic gravitational waves based on the latest CMB observations[J]. CLASSICAL AND QUANTUM GRAVITY,2012,29(15).
APA	Tong, Minglei.(2012).Revisit relic gravitational waves based on the latest CMB observations.CLASSICAL AND QUANTUM GRAVITY,29(15).
MLA	Tong, Minglei."Revisit relic gravitational waves based on the latest CMB observations".CLASSICAL AND QUANTUM GRAVITY 29.15(2012).

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