CMB Polarization B-mode Delensing with SPTpol and Herschel

被引：48

作者：

Manzotti, A. ^{[1
,2
]}

Story, K. T. ^{[3
,4
]}

Wu, W. L. K. ^{[5
]}

Austermann, J. E. ^{[6
]}

Beall, J. A. ^{[6
]}

Bender, A. N. ^{[1
,7
]}

Benson, B. A. ^{[1
,2
,8
]}

Bleem, L. E. ^{[1
,7
]}

Bock, J. J. ^{[9
,10
]}

Carlstrom, J. E. ^{[1
,2
,7
,11
,12
]}

Chang, C. L. ^{[1
,2
,7
]}

Chiang, H. C. ^{[13
]}

Cho, H-M. ^{[14
]}

Citron, R. ^{[1
]}

Conley, A. ^{[6
]}

Crawford, T. M. ^{[1
,2
]}

Crites, A. T. ^{[1
,2
,9
]}

de Haan, T. ^{[5
]}

Dobbs, M. A. ^{[15
,16
]}

Dodelson, S. ^{[1
,2
,8
]}

Everett, W. ^{[17
]}

Gallicchio, J. ^{[1
,18
]}

George, E. M. ^{[5
]}

Gilbert, A. ^{[15
]}

Halverson, N. W. ^{[17
,19
]}

Harrington, N. ^{[5
]}

Henning, J. W. ^{[1
,2
]}

Hilton, G. C. ^{[6
]}

Holder, G. P. ^{[16
,20
,21
]}

Holzapfel, W. L. ^{[5
]}

Hoover, S. ^{[1
,11
]}

Hou, Z. ^{[1
]}

Hrubes, J. D. ^{[22
]}

Huang, N. ^{[5
]}

Hubmayr, J. ^{[6
]}

Irwin, K. D. ^{[4
,14
]}

Keisler, R. ^{[3
,4
]}

Knox, L. ^{[23
]}

Lee, A. T. ^{[5
,24
]}

Leitch, E. M. ^{[1
,2
]}

Li, D. ^{[6
,14
]}

McMahon, J. J. ^{[25
]}

Meyer, S. S. ^{[1
,2
,11
,12
]}

Mocanu, L. M. ^{[1
,2
]}

Natoli, T. ^{[26
]}

Nibarger, J. P. ^{[6
]}

Novosad, V. ^{[27
]}

Padin, S. ^{[1
,2
,9
]}

Pryke, C. ^{[28
]}

Reichardt, C. L. ^{[29
]}

机构：

[1] Univ Chicago, Kavli Inst Cosmol Phys, 5640 South Ellis Ave, Chicago, IL 60637 USA

[2] Univ Chicago, Dept Astron & Astrophys, 5640 South Ellis Ave, Chicago, IL 60637 USA

[3] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, 452 Lomita Mall, Stanford, CA 94305 USA

[4] Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA

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

[6] NIST Quantum Devices Grp, 325 Broadway Mailcode 81703, Boulder, CO 80305 USA

[7] Argonne Natl Lab, Div High Energy Phys, 9700 South Cass Ave, Argonne, IL 60439 USA

[8] Fermilab Natl Accelerator Lab, MS209,POB 500, Batavia, IL 60510 USA

[9] CALTECH, MS 367-17,1200 East Calif Blvd, Pasadena, CA 91125 USA

[10] Jet Prop Lab, Pasadena, CA 91109 USA

[11] Univ Chicago, Dept Phys, 5640 South Ellis Ave, Chicago, IL 60637 USA

[12] Univ Chicago, Enrico Fermi Inst, 5640 South Ellis Ave, Chicago, IL 60637 USA

[13] Univ KwaZulu Natal, Sch Math Stat & Comp Sci, Durban, South Africa

[14] Natl Accelerator Lab, SLAC, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[15] McGill Univ, Dept Phys, 3600 Rue Univ, Montreal, PQ H3A 2T8, Canada

[16] Canadian Inst Adv Res, CIFAR Program Cosmol & Grav, Toronto, ON M5G 1Z8, Canada

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

[18] Harvey Mudd Coll, 301 Platt Blvd, Claremont, CA 91711 USA

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

[20] Univ Illinois, Astron Dept, 1002 West Green St, Urbana, IL 61801 USA

[21] Univ Illinois, Dept Phys, 1110 West Green St, Urbana, IL 61801 USA

[22] Univ Chicago, 5640 South Ellis Ave, Chicago, IL 60637 USA

[23] Univ Calif Davis, Dept Phys, One Shields Ave, Davis, CA 95616 USA

[24] Lawrence Berkeley Natl Lab, Phys Div, Berkeley, CA 94720 USA

[25] Univ Michigan, Dept Phys, 450 Church St, Ann Arbor, MI 48109 USA

[26] Univ Toronto, Dunlap Inst Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada

[27] Argonne Natl Lab, Div Mat Sci, 9700 South Cass Ave, Argonne, IL 60439 USA

[28] Univ Minnesota, Sch Phys & Astron, 116 Church St SE, Minneapolis, MN 55455 USA

[29] Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia

[30] Case Western Reserve Univ, Dept Phys, Ctr Educ & Res Cosmol & Astrophys, Cleveland, OH 44106 USA

[31] Inst Chicago, Sch Art, Liberal Arts Dept, 112 S Michigan Ave, Chicago, IL 60603 USA

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

[33] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[34] Univ Toronto, Dept Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada

[35] Rochester Inst Technol, Sch Phys & Astron, Ctr Detectors, 1 Lomb Mem Dr, Rochester, NY 14623 USA

来源：

ASTROPHYSICAL JOURNAL | 2017年 / 846卷 / 01期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

cosmic background radiation; cosmology: observations; early universe; inflation; POWER SPECTRUM;

D O I：

10.3847/1538-4357/aa82bb

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a demonstration of delensing the observed cosmic microwave background (CMB) B-mode polarization anisotropy. This process of reducing the gravitational-lensing-generated B-mode component will become increasingly important for improving searches for the B modes produced by primordial gravitational waves. In this work, we delens B-mode maps constructed from multi-frequency SPTpol observations of a 90 deg(2) patch of sky by subtracting a B-mode template constructed from two inputs: SPTpol E-mode maps and a lensing potential map estimated from the Herschel 500 mu m map of the cosmic infrared background. We find that our delensing procedure reduces the measured B-mode power spectrum by 28% in the multipole range 300 < l < 2300; this is shown to be consistent with expectations from simulations and to be robust against systematics. The null hypothesis of no delensing is rejected at 6.9 sigma. Furthermore, we build and use a suite of realistic simulations to study the general properties of the delensing process and find that the delensing efficiency achieved in this work is limited primarily by the noise in the lensing potential map. We demonstrate the importance of including realistic experimental non-idealities in the delensing forecasts used to inform instrument and survey-strategy planning of upcoming lower-noise experiments, such as CMB-S4.

引用

页数：17

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