David Leon

POLARBEAR constraints on cosmic birefringence and primordial magnetic fields

Author(s): Ade, PAR; Arnold, K; Atlas, M; Baccigalupi, C; Barron, D; Boettger, D; Borrill, J; Chapman, S; Chinone, Y; Cukierman, A; Dobbs, M; Ducout, A; Dunner, R; Elleflot, T; Errard, J; Fabbian, G; Feeney, S; Feng, C; Gilbert, A; Goeckner-Wald, N; Groh, J; Hall, G; Halverson, NW; Hasegawa, M; Hattori, K; Hazumi, M; Hill, C; Holzapfel, WL; Hori, Y; Howe, L; Inoue, Y; Jaehnig, GC; Jaffe, AH; Jeong, O; Katayama, N; Kaufman, JP; Keating, B; Kermish, Z; Keskitalo, R; Kisner, T; Kusaka, A; Le Jeune, M; Lee, AT; Leitch, EM; Leon, D; Li, Y; Linder, E; Lowry, L; Matsuda, F; Matsumura, T; Miller, N; Montgomery, J; Myers, MJ; Navaroli, M; Nishino, H; Okamura, T; Paar, H; Peloton, J; Pogosian, L; Poletti, D; Puglisi, G; Raum, C; Rebeiz, G; Reichardt, CL; Richards, PL; Ross, C; Rotermund, KM; Schenck, DE; Sherwin, BD; Shimon, M; Shirley, I; Siritanasak, P; Smecher, G; Stebor, N; Steinbach, B; Suzuki, A; Suzuki, JI; Tajima, O; Takakura, S; Tikhomirov, A; Tomaru, T; Whitehorn, N; Wilson, B; Yadav, A; Zahn, A | Abstract:

A Measurement of the Cosmic Microwave Background B-mode Polarization Power Spectrum at Subdegree Scales from Two Years of polarbear Data

We report an improved measurement of the cosmic microwave background B-mode polarization power spectrum with the Polarbear experiment at 150 GHz. By adding new data collected during the second season of observations (2013–2014) to re-analyzed data from the first season (2012–2013), we have reduced twofold the band-power uncertainties. The band powers are reported over angular multipoles

POLARBEAR-2: An instrument for CMB polarization measurements

500\leqslant {\ell }\leqslant 2100

Performance of a continuously rotating half-wave plate on the POLARBEAR telescope

, where the dominant B-mode signal is expected to be due to the gravitational lensing of E-modes. We reject the null hypothesis of no B-mode polarization at a confidence of 3.1σ including both statistical and systematic uncertainties. We test the consistency of the measured B-modes with the Λ Cold Dark Matter (ΛCDM) framework by fitting for a single lensing amplitude parameter A L relative to the Planck 2015 best-fit model prediction. We obtain

The Simons Array CMB polarization experiment

{A}_{L}={0.60}_{-0.24}^{+0.26}(\mathrm{stat}{)}_{-0.04}^{+0.00}(\mathrm{inst})

Modeling atmospheric emission for CMB ground-based observations

± 0.14(foreground) ± 0.04(multi), where

Making maps of cosmic microwave background polarization for B-mode studies: the POLARBEAR example

{A}_{L}=1

Using the Crab Nebula as a high precision calibrator for cosmic microwave background polarimeters

is the fiducial ΛCDM value.

The cosmic microwave background and pseudo-Nambu–Goldstone bosons: Searching for Lorentz violations in the cosmos

POLARBEAR-2 (PB-2) is a cosmic microwave background (CMB) polarization experiment that will be located in the Atacama highland in Chile at an altitude of 5200 m. Its science goals are to measure the CMB polarization signals originating from both primordial gravitational waves and weak lensing. PB-2 is designed to measure the tensor to scalar ratio, r, with precision σ(r) > 0:01, and the sum of neutrino masses, Σmz, with σ(Σmv) < 90 meV. To achieve these goals, PB-2 will employ 7588 transition-edge sensor bolometers at 95 GHz and 150 GHz, which will be operated at the base temperature of 250 mK. Science observations will begin in 2017.

The POLARBEAR-2 and Simons Array Focal Plane Fabrication Status

National Science Foundation AST-0618398 AST-1212230 Comision Nacional de Investigacion Cientifica y Tecnologica de Chile (CONICYT) Office of Science of the U.S. Department of Energy DE-AC02-05CH11231 MEXT KAKENHI Grant JP15H05891 21111002 JSPS KAKENHI Grant JP26220709 JP24111715 JSPS Core-to-Core Program RADIOFOREGROUNDS grant of the European Unions Horizon research and innovation programme (COMPET) 687312 INDARK INFN Initiative CONICYTs UC Berkeley-Chile Seed Grant (CLAS fund) 77047 Fondecyt 1130777 DFI postgraduate scholarship program DFI Postgraduate Competitive Fund for Support in the Attendance to Scientific Events NSF AST-1501422 CNES postdoctoral program Science and Technology Facilities Council ST/L000652/1 European Research Council under the European Unions Seventh Framework Programme (FP) / ERC Grant 616170 Australian Research Councils Future Fellowship FT150100074 hp150132