MEASUREMENT OF COSMIC MICROWAVE BACKGROUND POLARIZATION POWER SPECTRA FROM TWO YEARS OF BICEP DATA

被引：191

作者：

Chiang, H. C. ^{[1
,2
]}

Ade, P. A. R. ^{[3
]}

Barkats, D. ^{[1
,4
]}

Battle, J. O. ^{[5
]}

Bierman, E. M. ^{[6
]}

Bock, J. J. ^{[1
,5
]}

Dowell, C. D. ^{[5
]}

Duband, L. ^{[14
]}

Hivon, E. F. ^{[8
]}

Holzapfel, W. L. ^{[9
]}

Hristov, V. V. ^{[1
]}

Jones, W. C. ^{[1
,2
]}

Keating, B. G. ^{[6
]}

Kovac, J. M. ^{[1
]}

Kuo, C. L. ^{[7
,13
]}

Lange, A. E. ^{[1
,5
]}

Leitch, E. M. ^{[10
]}

Mason, P. V. ^{[1
]}

Matsumura, T. ^{[1
]}

Nguyen, H. T. ^{[5
]}

Ponthieu, N. ^{[12
]}

Pryke, C. ^{[10
]}

Richter, S. ^{[1
]}

Rocha, G. ^{[1
,5
]}

Sheehy, C. ^{[10
]}

Takahashi, Y. D. ^{[9
]}

Tolan, J. E. ^{[7
,13
]}

Yoon, K. W. ^{[11
]}

机构：

[1] CALTECH, Dept Phys, Pasadena, CA 91125 USA

[2] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[3] Univ Wales Coll Cardiff, Dept Phys & Astron, Cardiff CF24 3YB, S Glam, Wales

[4] Natl Radio Astron Observ, Santiago, Chile

[5] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[6] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[7] Stanford Univ, Palo Alto, CA 94305 USA

[8] Inst Astrophys, F-75014 Paris, France

[9] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[10] Univ Chicago, Chicago, IL 60637 USA

[11] Natl Inst Stand & Technol, Boulder, CO 80305 USA

[12] Univ Paris Sud, Inst Astrophys Spatiale, Orsay, France

[13] KIPAC, Menlo Pk, CA 94025 USA

[14] Commissariat Energie Atom, SBT, Grenoble, France

来源：

ASTROPHYSICAL JOURNAL | 2010年 / 711卷 / 02期

关键词：

cosmic background radiation; cosmology: observations; gravitational waves; inflation; polarization; 2003; FLIGHT; GRAVITY-WAVES; ANISOTROPY; PROBE; TEMPERATURE;

D O I：

10.1088/0004-637X/711/2/1123

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Background Imaging of Cosmic Extragalactic Polarization (Bicep) is a bolometric polarimeter designed to measure the inflationary B-mode polarization of the cosmic microwave background (CMB) at degree angular scales. During three seasons of observing at the South Pole (2006 through 2008), Bicep mapped similar to 2% of the sky chosen to be uniquely clean of polarized foreground emission. Here, we present initial results derived from a subset of the data acquired during the first two years. We present maps of temperature, Stokes Q and U, E and B modes, and associated angular power spectra. We demonstrate that the polarization data are self-consistent by performing a series of jackknife tests. We study potential systematic errors in detail and show that they are sub-dominant to the statistical errors. We measure the E-mode angular power spectrum with high precision at 21 <= l <= 335, detecting for the first time the peak expected at l similar to 140. The measured E-mode spectrum is consistent with expectations from a Lambda CDM model, and the B-mode spectrum is consistent with zero. The tensor-to-scalar ratio derived from the B-mode spectrum is r = 0.02(-0.26)(+0.31) or r < 0.72 at 95% confidence, the first meaningful constraint on the inflationary gravitational wave background to come directly from CMB B-mode polarization.

引用

页码：1123 / 1140

页数：18

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