WMAP confirming the ellipticity in BOOMERanG and COBE CMB maps

被引：10

作者：

Gurzadyan, VG ^{[1
]}

Ade, PAR

De Bernardis, P

Bianco, CL

Bock, JJ

Boscaleri, A

Crill, BP

De Troia, G

Hivon, E

Hristov, VV

Kashin, AL

Kuloghlian, H

Lange, AE

Masi, S

Mauskopf, PD

Montroy, T

Natoli, P

Netterfield, CB

Pascale, E

Piacentini, F

Polenta, G

Ruhl, J

Yegorian, G

机构：

[1] Yerevan Phys Inst, Yerevan 375036, Armenia

[2] Univ Roma La Sapienza, Dipartimento Fis, ICRA, I-00185 Rome, Italy

[3] Dept Phys & Astron, Cardiff, S Glam, Wales

[4] JPL, Pasadena, CA USA

[5] CNR, IFAC, I-50127 Florence, Italy

[6] CALTECH, Pasadena, CA 91125 USA

[7] IPAC, Pasadena, CA USA

[8] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[9] Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy

[10] Univ Toronto, Dept Phys, Toronto, ON, Canada

来源：

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA B-GENERAL PHYSICS RELATIVITY ASTRONOMY AND MATHEMATICAL PHYSICS AND METHODS | 2003年 / 118卷 / 10-12期

关键词：

D O I：

10.1393/ncb/i2004-10047-4

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 mixing and hence due to non-precisely zero curvature of the hyperbolic Universe, it can be linked to the origin of WMAP low multipoles anomaly.

引用

页码：1101 / 1107

页数：7

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