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Constraints on Primordial Gravitational Waves Using Planck, WMAP, and New BICEP2/Keck Observations through the 2015 Season

Ade, P A R ; Ahmed, Z ; Aikin, R W ; Alexander, K D ; Barkats, D ; Benton, S J ; Bischoff, C A ; Bock, J J ; Bowens-Rubin, R ; Brevik, J A ; Buder, I ; Bullock, E ; Buza, V ; Connors, J ; Cornelison, J ; Crill, B P ; Crumrine, M ; Dierickx, M ; Duband, L ; Dvorkin, C ; Filippini, J P ; Fliescher, S ; Grayson, J ; Hall, G ; Halpern, M ; Harrison, S ; Hildebrandt, S R ; Hilton, G C ; Hui, H ; Irwin, K D ; Kang, J ; Karkare, K S ; Karpel, E ; Kaufman, J P ; Keating, B G ; Kefeli, S ; Kernasovskiy, S A ; Kovac, J M ; Kuo, C L ; Larsen, N A ; Lau, K ; Leitch, E M ; Lueker, M ; Megerian, K G ; Moncelsi, L ; Namikawa, T ; Netterfield, C B ; Nguyen, H T ; O'Brient, R ; Ogburn, R W ; Palladino, S ; Pryke, C ; Racine, B ; Richter, S ; Schillaci, A ; Schwarz, R ; Sheehy, C D ; Soliman, A ; St Germaine, T ; Staniszewski, Z K ; Steinbach, B ; Sudiwala, R V ; Teply, G P ; Thompson, K L ; Tolan, J E ; Tucker, C ; Turner, A D ; Umiltà, C ; Vieregg, A G ; Wandui, A ; Weber, A C ; Wiebe, D V ; Willmert, J ; Wong, C L ; Wu, W L K ; Yang, H ; Yoon, K W ; Zhang, C

Physical review letters, 2018-11, Vol.121 (22), p.221301-221301 [Periódico revisado por pares]

United States: American Physical Society

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Título:
Constraints on Primordial Gravitational Waves Using Planck, WMAP, and New BICEP2/Keck Observations through the 2015 Season
Autor: Ade, P A R ; Ahmed, Z ; Aikin, R W ; Alexander, K D ; Barkats, D ; Benton, S J ; Bischoff, C A ; Bock, J J ; Bowens-Rubin, R ; Brevik, J A ; Buder, I ; Bullock, E ; Buza, V ; Connors, J ; Cornelison, J ; Crill, B P ; Crumrine, M ; Dierickx, M ; Duband, L ; Dvorkin, C ; Filippini, J P ; Fliescher, S ; Grayson, J ; Hall, G ; Halpern, M ; Harrison, S ; Hildebrandt, S R ; Hilton, G C ; Hui, H ; Irwin, K D ; Kang, J ; Karkare, K S ; Karpel, E ; Kaufman, J P ; Keating, B G ; Kefeli, S ; Kernasovskiy, S A ; Kovac, J M ; Kuo, C L ; Larsen, N A ; Lau, K ; Leitch, E M ; Lueker, M ; Megerian, K G ; Moncelsi, L ; Namikawa, T ; Netterfield, C B ; Nguyen, H T ; O'Brient, R ; Ogburn, R W ; Palladino, S ; Pryke, C ; Racine, B ; Richter, S ; Schillaci, A ; Schwarz, R ; Sheehy, C D ; Soliman, A ; St Germaine, T ; Staniszewski, Z K ; Steinbach, B ; Sudiwala, R V ; Teply, G P ; Thompson, K L ; Tolan, J E ; Tucker, C ; Turner, A D ; Umiltà, C ; Vieregg, A G ; Wandui, A ; Weber, A C ; Wiebe, D V ; Willmert, J ; Wong, C L ; Wu, W L K ; Yang, H ; Yoon, K W ; Zhang, C
Assuntos: array ; BICEP2 ; Computer simulation ; Dust ; Gravitation ; gravitational ; Gravitational waves ; KECK ; Noise ; Noise levels ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; Planck ; primordial ; Signal to noise ratio ; waves ; WMAP
É parte de: Physical review letters, 2018-11, Vol.121 (22), p.221301-221301
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
USDOE Office of Science (SC), High Energy Physics (HEP)
BNL-209746-2018-JAAM
SC0012704; AC02-76SF00515; 0742818; 0742592; 1044978; 1110087; 1145172; 1145143; 1145248; 1639040; 1638957; 1638978; 1638970; 06-ARPA206-0040; 10-SAT10-0017; 12-SAT12-0031; 14-SAT14-0009; 16-SAT-16-0002; ST/N000706/1
Descrição: We present results from an analysis of all data taken by the bicep2/Keck CMB polarization experiments up to and including the 2015 observing season. This includes the first Keck Array observations at 220 GHz and additional observations at 95 and 150 GHz. The Q and U maps reach depths of 5.2, 2.9, and 26 μK_{CMB} arcmin at 95, 150, and 220 GHz, respectively, over an effective area of ≈400 square degrees. The 220 GHz maps achieve a signal to noise on polarized dust emission approximately equal to that of Planck at 353 GHz. We take auto and cross spectra between these maps and publicly available WMAP and Planck maps at frequencies from 23 to 353 GHz. We evaluate the joint likelihood of the spectra versus a multicomponent model of lensed-ΛCDM+r+dust+synchrotron+noise. The foreground model has seven parameters, and we impose priors on some of these using external information from Planck and WMAP derived from larger regions of sky. The model is shown to be an adequate description of the data at the current noise levels. The likelihood analysis yields the constraint r_{0.05}<0.07 at 95% confidence, which tightens to r_{0.05}<0.06 in conjunction with Planck temperature measurements and other data. The lensing signal is detected at 8.8σ significance. Running a maximum likelihood search on simulations we obtain unbiased results and find that σ(r)=0.020. These are the strongest constraints to date on primordial gravitational waves.
Editor: United States: American Physical Society
Idioma: Inglês

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Constraints on Primordial Gravitational Waves Using Planck, WMAP, and New BICEP2/Keck Observations through the 2015 Season

United States: American Physical Society

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