Detecting relic gravitational waves in the CMB: Comparison of different methods

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dc.creatorZhao, W.
dc.date2009-02-11
dc.date2009-03-27
dc.date.accessioned2026-07-07T13:01:52Z
dc.date.available2026-07-07T13:01:52Z
dc.descriptionIn this paper, we discuss the constraint on the relic gravitational waves by both temperature and polarization anisotropies power spectra of cosmic microwave background radiation. Taking into account the instrumental noises of Planck satellite, we calculate the signal-to-noise ratio $S/N$ by the simulation and the analytic approximation methods. We find that, comparing with the $BB$ channel, the value of $S/N$ is much improved in the case where all the power spectra, $TT$, $TE$, $EE$ and $BB$, are considered. If the noise power spectra of Planck satellite increase for some reasons, the value of $S/N$ in $BB$ channel is much reduced. However, in the latter case where all the power spectra of cosmic microwave background radiation are considered, the value of $S/N$ is less influenced. We also find that the free parameters $A_s$, $n_s$ and $n_t$ have little influence on the value of $S/N$ in both cases.
dc.description37 pages, 7 figures, published version
dc.identifierhttps://arxiv.org/abs/0902.1848
dc.identifierhttp://arxiv.org/abs/0902.1848
dc.identifierPhys.Rev.D79:063003,2009
dc.identifierdoi:10.1103/PhysRevD.79.063003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/226295
dc.subjectCosmology and Nongalactic Astrophysics
dc.subjectSolar and Stellar Astrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleDetecting relic gravitational waves in the CMB: Comparison of different methods
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