학술논문
Improved upper limit on degree-scale CMB B-mode polarization power from the 670 square-degree POLARBEAR survey
Document Type
Working Paper
Author
The POLARBEAR Collaboration; Adachi, S.; Adkins, T.; Faúndez, M. A. O. Aguilar; Arnold, K. S.; Baccigalupi, C.; Barron, D.; Chapman, S.; Cheung, K.; Chinone, Y.; Crowley, K. T.; Elleflot, T.; Errard, J.; Fabbian, G.; Feng, C.; Fujino, T.; Galitzki, N.; Halverson, N. W.; Hasegawa, M.; Hazumi, M.; Hirose, H.; Howe, L.; Ito, J.; Jeong, O.; Kaneko, D.; Katayama, N.; Keating, B.; Kisner, T.; Krachmalnicoff, N.; Kusaka, A.; Lee, A. T.; Linder, E.; Lonappan, A. I.; Lowry, L. N.; Matsuda, F.; Matsumura, T.; Minami, Y.; Murata, M.; Nishino, H.; Nishinomiya, Y.; Poletti, D.; Reichardt, C. L.; Ross, C.; Segawa, Y.; Siritanasak, P.; Stompor, R.; Suzuki, A.; Tajima, O.; Takakura, S.; Takatori, S.; Tanabe, D.; Teply, G.; Yamada, K.; Zhou, Y.
Source
The POLARBEAR Collaboration 2022 ApJ 931 101
Subject
Language
Abstract
We report an improved measurement of the degree-scale cosmic microwave background $B$-mode angular-power spectrum over 670 square-degree sky area at 150 GHz with POLARBEAR. In the original analysis of the data, errors in the angle measurement of the continuously rotating half-wave plate, a polarization modulator, caused significant data loss. By introducing an angle-correction algorithm, the data volume is increased by a factor of 1.8. We report a new analysis using the larger data set. We find the measured $B$-mode spectrum is consistent with the $\Lambda$CDM model with Galactic dust foregrounds. We estimate the contamination of the foreground by cross-correlating our data and Planck 143, 217, and 353 GHz measurements, where its spectrum is modeled as a power law in angular scale and a modified blackbody in frequency. We place an upper limit on the tensor-to-scalar ratio $r$ < 0.33 at 95% confidence level after marginalizing over the foreground parameters.
Comment: 16 pages, 9 figures, 8 tables, Published in ApJ
Comment: 16 pages, 9 figures, 8 tables, Published in ApJ