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

doi:10.1142/S0217732305016658

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

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3 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 language	English (US)
Pages (from-to)	491-498
Number of pages	8
Journal	Modern Physics Letters A
Volume	20
Issue number	7
DOIs	https://doi.org/10.1142/S0217732305016658
State	Published - Mar 7 2005
Externally published	Yes

Keywords

Cosmic background radiation
Cosmology

ASJC Scopus subject areas

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

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10.1142/S0217732305016658

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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

Gurzadyan, VG, Ade, PAR, De Bernardis, P, Bianco, CL, Bock, JJ, Boscaleri, A, Crill, BP, De Troia, G, Hivon, E, Hristov, VV, Kashin, AL, Kuloghlian, H, Masi, S, Mauskopf, PD, 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, vol. 20, no. 7, pp. 491-498. https://doi.org/10.1142/S0217732305016658

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title = "Ellipticity of large spots in CMB anisotropy maps",

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.",

keywords = "Cosmic background radiation, Cosmology",

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

note = "Funding Information: The BOOMERanG experiment is supported in Italy by Agenzia Spaziale Italiana, Programma Nazionale Ricerche in Antartide, Universit{\`a} di Roma La Sapienza; by PPARC in the UK, by NASA, NSF OPP and NERSC in the U.S.A., and by CIAR and NSERC in Canada.",

year = "2005",

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doi = "10.1142/S0217732305016658",

language = "English (US)",

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pages = "491--498",

journal = "Modern Physics Letters A",

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TY - JOUR

T1 - Ellipticity of large spots in CMB anisotropy maps

AU - Gurzadyan, V. G.

AU - Ade, P. A.R.

AU - De Bernardis, P.

AU - Bianco, C. L.

AU - Bock, J. J.

AU - Boscaleri, A.

AU - Crill, B. P.

AU - De Troia, G.

AU - Hivon, E.

AU - Hristov, V. V.

AU - Kashin, A. L.

AU - Kuloghlian, H.

AU - Masi, S.

AU - Mauskopf, P. D.

AU - Montroy, T.

AU - Natoli, P.

AU - Pascale, E.

AU - Piacentini, F.

AU - Polenta, G.

AU - Yegorian, G.

N1 - Funding Information: The BOOMERanG experiment is supported in Italy by Agenzia Spaziale Italiana, Programma Nazionale Ricerche in Antartide, Università di Roma La Sapienza; by PPARC in the UK, by NASA, NSF OPP and NERSC in the U.S.A., and by CIAR and NSERC in Canada.

PY - 2005/3/7

Y1 - 2005/3/7

N2 - 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.

AB - 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.

KW - Cosmic background radiation

KW - Cosmology

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VL - 20

SP - 491

EP - 498

JO - Modern Physics Letters A

JF - Modern Physics Letters A

IS - 7

ER -

Ellipticity of large spots in CMB anisotropy maps

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Keywords

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