학술논문
BICEP / Keck XVII: Line of Sight Distortion Analysis: Estimates of Gravitational Lensing, Anisotropic Cosmic Birefringence, Patchy Reionization, and Systematic Errors
Document Type
Working Paper
Author
Collaboration, BICEP/Keck; Ade, P. A. R.; Ahmed, Z.; Amiri, M.; Barkats, D.; Thakur, R. Basu; Beck, D.; Bischoff, C. A.; Bock, J. J.; Boenish, H.; Bullock, E.; Buza, V.; Cheshire IV, J. R.; Connors, J.; Cornelison, J.; Crumrine, M.; Cukierman, A.; Denison, E. V.; Dierickx, M.; Duband, L.; Eiben, M.; Fatigoni, S.; Filippini, J. P.; Fliescher, S.; Giannakopoulos, C.; Goeckner-Wald, N.; Goldfinger, D. C.; Grayson, J.; Grimes, P.; Halal, G.; Hall, G.; Halpern, M.; Hand, E.; Harrison, S.; Henderson, S.; Hildebrandt, S. R.; Hubmayr, J.; Hui, H.; Irwin, K. D.; Kang, J.; Karkare, K. S.; Karpel, E.; Kefeli, S.; Kernasovskiy, S. A.; Kovac, J. M.; Kuo, C. L.; Lau, K.; Leitch, E. M.; Lennox, A.; Megerian, K. G.; Minutolo, L.; Moncelsi, L.; Nakato, Y.; Namikawa, T.; Nguyen, H. T.; O'Brient, R.; Ogburn IV, R. W.; Palladino, S.; Petroff, M. A.; Prouve, T.; Pryke, C.; Racine, B.; Reintsema, C. D.; Richter, S.; Schillaci, A.; Schmitt, B. L.; Schwarz, R.; Sheehy, C. D.; Singari, B.; Soliman, A.; Germaine, T. St; Steinbach, B.; Sudiwala, R. V.; Teply, G. P.; Thompson, K. L.; Tolan, J. E.; Tucker, C.; Turner, A. D.; Umilta, C.; Verges, 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.; Young, E.; Yu, C.; Zeng, L.; Zhang, C.; Zhang, S.
Source
ApJ (2023) 949 43
Subject
Language
Abstract
We present estimates of line-of-sight distortion fields derived from the 95 GHz and 150 GHz data taken by BICEP2, BICEP3, and Keck Array up to the 2018 observing season, leading to cosmological constraints and a study of instrumental and astrophysical systematics. Cosmological constraints are derived from three of the distortion fields concerning gravitational lensing from large-scale structure, polarization rotation from magnetic fields or an axion-like field, and the screening effect of patchy reionization. We measure an amplitude of the lensing power spectrum $A_L^{\phi\phi}=0.95 \pm 0.20$. We constrain polarization rotation, expressed as the coupling constant of a Chern-Simons electromagnetic term $g_{a\gamma} \leq 2.6 \times 10^{-2}/H_I$, where $H_I$ is the inflationary Hubble parameter, and an amplitude of primordial magnetic fields smoothed over 1 Mpc $B_{1\text{Mpc}} \leq 6.6 \;\text{nG}$ at 95 GHz. We constrain the root mean square of optical-depth fluctuations in a simple "crinkly surface" model of patchy reionization, finding $A^\tau<0.19$ ($2\sigma$) for the coherence scale of $L_c=100$. We show that all of the distortion fields of the 95 GHz and 150 GHz polarization maps are consistent with simulations including lensed-$\Lambda$CDM, dust, and noise, with no evidence for instrumental systematics. In some cases, the EB and TB quadratic estimators presented here are more sensitive than our previous map-based null tests at identifying and rejecting spurious B-modes that might arise from instrumental effects. Finally, we verify that the standard deprojection filtering in the BICEP/Keck data processing is effective at removing temperature to polarization leakage.
Comment: 34 pages, 19 figures, accepted for publication in The Astrophysical Journal
Comment: 34 pages, 19 figures, accepted for publication in The Astrophysical Journal