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Hint of relic gravitational waves in the Planck and WMAP data · Around

2014

Hint of relic gravitational waves in the Planck and WMAP data

Zhao, Wen, Cheng, Cheng, Huang, Qing-Guo

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Relic gravitational waves (RGWs) leave well-understood imprints on the anisotropies in the temperature and polarization of cosmic microwave background (CMB) radiation.

In the TT and TE information channels, which have been well observed by WMAP and Planck missions, RGWs compete with density perturbations mainly at low multipoles.
It is dangerous to include high-multipole CMB data in the search for gravitational waves, as the spectral indices may not be constants.
In this paper, we repeat our previous work [W.Zhao & L.P.Grishchuk, Phys.Rev.D {\bf 82}, 123008 (2010)] by utilizing the Planck TT and WMAP TE data in the low-multipole range $\ell\le100$.

Built on

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Similar

D. Baskaran, L. P. Grishchuk and A. G. Polnarev, Phys. Rev. D 74
2006
Cited alongside, same era.
W. Zhao, Phys. Rev. D 79
2009
Cited alongside, same era.
W. Zhao, D. Baskaran and L. P. Grishchuk, Phys. Rev. D 79
2009
Cited alongside, same era.
W. Zhao, D. Baskaran and L. P. Grishchuk, Phys. Rev. D 80
2009
Cited alongside, same era.
L. P. Grishchuk, in General Relativity and John Archibald Wheeler , edited by I. Ciufolini and R. Matzner (Springer, New York, 20‘0), pp. 151-199 [arXiv:0707.3319]
Original
Cited in the paper.
Planck Collaboration, arXiv:1303.5075
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Planck Collaboration, arXiv:1303.5076
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Cited in the paper.
A. Challinor, astro-ph/0403344
Cited in the paper.
A. Challinor, astro-ph/0502093
Cited in the paper.
C. Cheng, Q. G. Huang and W. Zhao, in preparation
Cited in the paper.
BICEP2 Collaboration: P. A. R Ade et al., arXiv:1403.3985
Original
Cited in the paper.

Then

W. Zhao, D. Baskaran and L. P. Grishchuk, Phys. Rev. D 82
2010
Later among the works it cites.
W. Zhao and L. P. Grishchuk, Phys. Rev. D 82
2010
Later among the works it cites.
E. Gjerlow and O. Elgaroy, Phys. Rev. D 83
2011
Later among the works it cites.
C. L. Bennett et al. Astrophys. J. Suppl. 208
2013
Later among the works it cites.

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