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Ellipticity of large spots in CMB Anisotropy maps

Gurzadyan, V. G., Ade, Peter A. R., de Bernardis, P., Bianco, C. L., Bock, J. J., Boscaleri, A., Crill, B. P., de Troia, G., Hivon, E., Hristov, V. V., Kashin, A. L., Kuloghlian, H., Masi, S., Mauskopf, Philip Daniel, Montroy, T., Natoli, P., Pascale, Enzo, Piacentini, F., Polenta, G. and Yegorian, G. 2005. Ellipticity of large spots in CMB Anisotropy maps. Modern Physics Letters A 20 (07) , p. 491. 10.1142/S0217732305016658

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We have measured the ellipticity of several degree scale anisotropies in the BOOMERanG maps of the Cosmic Microwave Background (CMB) at 150 GHz. The average ellipticity is around 2.6–2.7. The biases of the estimator of the ellipticity and for the noise are small in this case. Large spot elongation had been detected also for COBE-DMR and WMAP maps. If this effect is due to geodesic mixing, it would indicate a non-precisely zero curvature of the Universe which is among the discussed reasons of the WMAP low multipole anomaly.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Cosmology; cosmic background radiation
Publisher: World Scientific Publishing
ISSN: 0217-7323
Last Modified: 23 Jan 2020 03:56

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