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Bianchi type VIIh models and the WMAP 3-year data

Jaffe, T. R. and Banday, A. J. and Eriksen, H. K. and Górski, K. M. and Hansen, F. K. (2006) Bianchi type VIIh models and the WMAP 3-year data. Astronomy and Astrophysics, 460 (2). pp. 393-396. ISSN 0004-6361. doi:10.1051/0004-6361:20065748.

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Context. A specific example of Bianchi type VIIh models, i.e. those including universal rotation (vorticity) and differential expansion (shear), has been shown in Jaffe et al. (2005, ApJ, 629, L1) to correlate unexpectedly with the WMAP first-year data. Aims. We re-assess the signature of this model in the WMAP 3-year data. Methods. The cross-correlation methods are described in Jaffe et al. (2006a, ApJ, 643, 616). We use the WMAP 3-year data release, including maps for individual years, and perform additional comparisons to assess the influence of both noise and residual foregrounds and eliminate potential non-cosmological sources for the correlation. Results. We confirm that the signal is detected in both the combined 3-year data and the individual yearly sky maps at a level consistent with our original analysis. The significance of the correlation is not affected by either noise or foreground residuals. Conclusions. The results of our previous study are unchanged.

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Additional Information:© ESO 2006. (Received 2 June 2006 / Accepted 13 September 2006) We acknowledge use of the HEALPix software (Górski et al. 2005) and of the Legacy Archive for Microwave Background Data Analysis (LAMBDA). Support for LAMBDA is provided by the NASA Office of Space Science.
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Subject Keywords:cosmic microwave background -- cosmology: observations
Issue or Number:2
Record Number:CaltechAUTHORS:JAFaanda06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12818
Deposited By: Archive Administrator
Deposited On:24 Dec 2008 23:48
Last Modified:08 Nov 2021 22:33

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