Ellipticity of large spots in CMB anisotropy maps

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

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)491-498
Number of pages8
JournalModern Physics Letters A
Volume20
Issue number7
DOIs
StatePublished - Mar 7 2005
Externally publishedYes

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Keywords

  • Cosmic background radiation
  • Cosmology

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Astronomy and Astrophysics
  • Physics and Astronomy(all)

Cite this

Gurzadyan, V. G., Ade, P. 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, P. D., Montroy, T., Natoli, P., Pascale, E., Piacentini, F., Polenta, G., & Yegorian, G. (2005). Ellipticity of large spots in CMB anisotropy maps. Modern Physics Letters A, 20(7), 491-498. https://doi.org/10.1142/S0217732305016658