A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND B-MODE POLARIZATION POWER SPECTRUM AT SUB-DEGREE SCALES WITH POLARBEAR

被引：236

作者：

Ade, P. A. R. ^{[1
]}

Akiba, Y. ^{[2
]}

Anthony, A. E. ^{[3
,4
]}

Arnold, K. ^{[5
]}

Atlas, M. ^{[5
]}

Barron, D. ^{[5
]}

Boettger, D. ^{[5
]}

Borrill, J. ^{[6
,7
]}

Chapman, S. ^{[8
]}

Chinone, Y. ^{[9
,10
]}

Dobbs, M. ^{[11
]}

Elleflot, T. ^{[5
]}

Errard, J. ^{[6
,7
]}

Fabbian, G. ^{[12
,13
]}

Feng, C. ^{[5
]}

Flanigan, D. ^{[9
,14
]}

Gilbert, A. ^{[11
]}

Grainger, W. ^{[15
]}

Halverson, N. W. ^{[3
,4
,16
]}

Hasegawa, M. ^{[2
,10
]}

Hattori, K. ^{[10
]}

Hazumi, M. ^{[2
,10
,17
]}

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

Hori, Y. ^{[10
]}

Howard, J. ^{[9
,18
]}

Hyland, P. ^{[19
]}

Inoue, Y. ^{[2
]}

Jaehnig, G. C. ^{[3
,16
]}

Jaffe, A. H. ^{[20
]}

Keating, B. ^{[5
]}

Kermish, Z. ^{[21
]}

Keskitalo, R. ^{[6
]}

Kisner, T. ^{[6
,7
]}

Le Jeune, M.

Lee, A. T. ^{[9
,22
]}

Leitch, E. M. ^{[23
,24
]}

Linder, E. ^{[22
]}

Lungu, M. ^{[9
,25
]}

Matsuda, F. ^{[5
]}

Matsumura, T. ^{[10
]}

Meng, X. ^{[9
]}

Miller, N. J. ^{[26
]}

Morii, H. ^{[10
]}

Moyerman, S. ^{[5
]}

Myers, M. J. ^{[9
]}

Navaroli, M.

Nishino, H. ^{[17
]}

Orlando, A. ^{[5
]}

Paar, H. ^{[5
]}

Peloton, J. ^{[12
]}

机构：

[1] Cardiff Univ, Sch Phys & Astron, Cardiff CF10 3XQ, S Glam, Wales

[2] Grad Univ Adv Studies, Miura, Kanagawa 2400115, Japan

[3] Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA

[4] Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA

[5] Univ Calif San Diego, Dept Phys, San Diego, CA 92093 USA

[6] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Computat Cosmol Ctr, Berkeley, CA 94720 USA

[7] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[8] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 4R2, Canada

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

[10] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan

[11] McGill Univ, Dept Phys, Montreal, PQ H3A 0G4, Canada

[12] Univ Paris Diderot, CNRS IN2P3, CEA Irfu, Obs Paris,Sorbonne Paris Cite, Paris, France

[13] SISSA, Int Sch Adv Studies, I-34014 Trieste, Italy

[14] Columbia Univ, Dept Phys, New York, NY 10027 USA

[15] STFC, Rutherford Appleton Lab, Swindon SN2 1SZ, Wilts, England

[16] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[17] Univ Tokyo, Todai Inst Adv Study, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan

[18] Univ Oxford, Dept Phys, Oxford OX1 2JD, England

[19] Dept Phys, Austin Coll, Sherman, TX 75090 USA

[20] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England

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

[22] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA

[23] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

[24] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

[25] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

[26] NASA, Observ Cosmol Lab, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[27] Napa Valley Coll, Dept Phys, Napa, CA 94558 USA

[28] Univ Calif San Diego, Dept Elect & Comp Engn, San Diego, CA 92093 USA

[29] Univ Calif Berkeley, Miller Inst Basic Res Sci, Berkeley, CA 94720 USA

[30] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[31] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[32] Three Speed Logic Inc, Vancouver, BC V6A 2J8, Canada

[33] Osaka Univ, Toyonaka, Osaka 5600043, Japan

来源：

ASTROPHYSICAL JOURNAL | 2014年 / 794卷 / 02期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

cosmic background radiation; cosmology: observations; large-scale structure of universe; PROBE WMAP OBSERVATIONS; ANGULAR SCALE; GRAVITY-WAVES; UPPER LIMIT; EMISSION; SUBMILLIMETER; TEMPERATURE; CALIBRATION; BEAMS; GHZ;

D O I：

10.1088/0004-637X/794/2/171

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report a measurement of the B-mode polarization power spectrum in the cosmic microwave background (CMB) using the Polarbear experiment in Chile. The faint B-mode polarization signature carries information about the universe's entire history of gravitational structure formation, and the cosmic inflation that may have occurred in the very early universe. Our measurement covers the angular multipole range 500 < l < 2100 and is based on observations of an effective sky area of 25 deg(2) with 3 '.5 resolution at 150 GHz. On these angular scales, gravitational lensing of the CMB by intervening structure in the universe is expected to be the dominant source of B-mode polarization. Including both systematic and statistical uncertainties, the hypothesis of no B-mode polarization power from gravitational lensing is rejected at 97.2% confidence. The band powers are consistent with the standard cosmological model. Fitting a single lensing amplitude parameter A(BB) to the measured band powers, A(BB) = 1.12 +/- 0.61(stat)(-0.12)(+0.04)(sys) +/- 0.07(multi), where A(BB) = 1 is the fiducial wmap-9 Lambda CDM value. In this expression, "stat" refers to the statistical uncertainty, "sys" to the systematic uncertainty associated with possible biases from the instrument and astrophysical foregrounds, and "multi" to the calibration uncertainties that have a multiplicative effect on the measured amplitude A(BB).

引用

页数：21

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