WMAP confirming the ellipticity in BOOMERanG and COBE CMB maps

V. G. Gurzadyan, P. A.R. Ade, P. De Bernardis, G. L. Blanco, J. J. Bock, A. Boscaleri, B. P. Crill, G. De Troia, E. Hivon, V. V. Hristov, A. L. Kashin, H. Kuloghlian, A. E. Lange, S. Masi, P. D. Mauskopf, T. Montroy, P. Natoli, G. B. Netterfield, E. Pascale, F. PlacentiniG. Polenta, J. Ruhl, G. Yegorian

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The recent study of BOOMERanG 150 GHz Cosmic Microwave Background (CMB) radiation maps have detected ellipticity of the temperature anisotropy spots independently of the temperature threshold. The effect has been found for spots up to several degrees in size, where the biases of the ellipticity estimator and of the noise are small. To check the effect, now we have studied, with the same algorithm and in the same sky region, the WMAP maps. We find ellipticity of the same average value also in WMAP maps, despite the different sensitivity of the two experiments to low multipoles. Large spot elongations had been detected also for the COBE-DMR maps. If this effect is due to geodesic mining and hence due to non-precisely zero curvature of the hyperbolic Universe, it can be linked to the origin of WMAP low multipoles anomaly.

Original languageEnglish (US)
Pages (from-to)1101-1107
Number of pages7
JournalNuovo Cimento della Societa Italiana di Fisica B
Issue number10-12
StatePublished - Oct 2003
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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