Improved Upper Limit on Degree-scale CMB B-mode Polarization Power from the 670 Square-degree POLARBEAR Survey

Improved Upper Limit on Degree-scale CMB B-mode Polarization Power from the 670 Square-degree POLARBEAR Survey
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DOI：
10.3847/1538-4357/ac6809
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发表时间：
2022-03
期刊：
The Astrophysical Journal
影响因子：
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通讯作者：
T. P. C. S. Adachi;T. Adkins;M. A. O. A. Fa'undez-M.-A.-O.-A.-Fa'undez-2089852550;K. Arnold;C. Baccigalupi;D. Barron;S. Chapman;K. Cheung;Y. Chinone;K. Crowley;T. Elleflot;J. Errard;G. Fabbian;C. Feng;T. Fujino;N. Galitzki;N. Halverson;M. Hasegawa;M. Hazumi;H. Hirose;L. Howe;J. Ito;O. Jeong;D. Kaneko;N. Katayama;B. Keating;T. Kisner;N. Krachmalnicoff;A. Kusaka;A. Lee;E. Linder;A. I. Lonappan;L. Lowry;F. Matsuda;T. Matsumura;Y. Minami;M. Murata;H. Nishino;Y. Nishinomiya;D. Poletti;C. Reichardt;C. Ross;Y. Segawa;Praweeen Siritanasak;R. Stompor;A. Suzuki;O. Tajima;S. Takakura;S. Takatori;D. Tanabe;G. Teply;K. Yamada;Y. Zhou
T. P. C. S. Adachi;T. Adkins;M. A. O. A. Fa'undez-M.-A.-O.-A.-Fa'undez-2089852550;K. Arnold;C. Baccigalupi;D. Barron;S. Chapman;K. Cheung;Y. Chinone;K. Crowley;T. Elleflot;J. Errard;G. Fabbian;C. Feng;T. Fujino;N. Galitzki;N. Halverson;M. Hasegawa;M. Hazumi;H. Hirose;L. Howe;J. Ito;O. Jeong;D. Kaneko;N. Katayama;B. Keating;T. Kisner;N. Krachmalnicoff;A. Kusaka;A. Lee;E. Linder;A. I. Lonappan;L. Lowry;F. Matsuda;T. Matsumura;Y. Minami;M. Murata;H. Nishino;Y. Nishinomiya;D. Poletti;C. Reichardt;C. Ross;Y. Segawa;Praweeen Siritanasak;R. Stompor;A. Suzuki;O. Tajima;S. Takakura;S. Takatori;D. Tanabe;G. Teply;K. Yamada;Y. Zhou
中科院分区：
其他
文献类型：
--
作者：
T. P. C. S. Adachi;T. Adkins;M. A. O. A. Fa'undez-M.-A.-O.-A.-Fa'undez-2089852550;K. Arnold;C. Baccigalupi;D. Barron;S. Chapman;K. Cheung;Y. Chinone;K. Crowley;T. Elleflot;J. Errard;G. Fabbian;C. Feng;T. Fujino;N. Galitzki;N. Halverson;M. Hasegawa;M. Hazumi;H. Hirose;L. Howe;J. Ito;O. Jeong;D. Kaneko;N. Katayama;B. Keating;T. Kisner;N. Krachmalnicoff;A. Kusaka;A. Lee;E. Linder;A. I. Lonappan;L. Lowry;F. Matsuda;T. Matsumura;Y. Minami;M. Murata;H. Nishino;Y. Nishinomiya;D. Poletti;C. Reichardt;C. Ross;Y. Segawa;Praweeen Siritanasak;R. Stompor;A. Suzuki;O. Tajima;S. Takakura;S. Takatori;D. Tanabe;G. Teply;K. Yamada;Y. Zhou

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我们报告了使用 Polarbear 在 150 GHz 频率下对 670 deg2 天空区域的度尺度宇宙微波背景 B 模式角功率谱进行改进的测量。在最初的数据分析中，连续旋转的半波片（偏振调制器）的角度测量误差导致了严重的数据丢失。通过引入角度校正算法，数据量增加了1.8倍。我们报告了使用更大数据集的新分析。我们发现测量的 B 模式光谱与银河尘埃前景的 ΛCDM 模型一致。我们通过将我们的数据与 Planck 143、217 和 353 GHz 测量进行互相关来估计前景的污染，其中其频谱被建模为角度尺度的幂律和频率的修改黑体。在边缘化前景参数后，我们在 95% 置信水平下对张量与标量比 r < 0.33 设定上限。
We report an improved measurement of the degree-scale cosmic microwave background B-mode angular-power spectrum over 670 deg2 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 ΛCDM 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.