Results of gravitational lensing and primordial gravitational waves from the POLARBEAR experiment-猫眼课题宝

POLARBEAR 实验的引力透镜和原初引力波结果

DOI：

10.1088/1742-6596/1468/1/012007

发表时间：

2020

期刊：

Journal of Physics: Conference Series

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作者：

Y. Chinone; M. Hazumi（38番目）et al. （他91名、総著者93名）

POLARBEAR是一个位于智利阿塔卡马沙漠的宇宙微波背景辐射（CMB）偏振实验。该实验的科学目标是表征引力透镜的B模式信号，以及寻找由原始引力波（PGW）产生的B模式信号。Polarbear于2012年开始观测，并发表了一系列结果。这些包括第一次测量的非零B模式角自功率谱在次度尺度的主导信号是引力透镜的CMB。此外，我们已经实现了第一次测量之间的互相关的透镜势，这是重建的CMB偏振数据单独由Polarbear，和宇宙剪切场从星系形状的斯巴鲁超Suprime-Cam（HSC）调查。2014年，我们在主镜焦点处安装了连续旋转半波片（CRHWP），以搜索PGW，并演示了低频噪声的控制。我们发现，在普朗克高频图的组合数据集中，低频B模功率与银河尘埃前景一致，因此在前景边缘化后，在95%的置信水平下，张量与标量比的上限为r< 0.90。

P OLARBEAR is a Cosmic Microwave Background radiation (CMB) polarization experiment that is located in the Atacama Desert in Chile. The scientific goals of the experiment are to characterize the B-mode signal from gravitational lensing, as well as to search for B-mode signals created by primordial gravitational waves (PGWs). Polarbear started observations in 2012 and has published a series of results. These include the first measurement of a nonzero B-mode angular auto-power spectrum at sub-degree scales where the dominant signal is gravitational lensing of the CMB. In addition, we have achieved the first measurement of crosscorrelation between the lensing potential, which was reconstructed from the CMB polarization data alone by Polarbear, and the cosmic shear field from galaxy shapes by the Subaru Hyper Suprime-Cam (HSC) survey. In 2014, we installed a continuously rotating half-wave plate (CRHWP) at the focus of the primary mirror to search for PGWs and demonstrated the control of low-frequency noise. We have found that the low-frequency B-mode power in the combined dataset with the Planck high-frequency maps is consistent with Galactic dust foreground, thus placing an upper limit on the tensor-to-scalar ratio of r< 0.90 at the 95% confidence level after marginalizing over the foregrounds.

T. Hasegawa: "Discovery of large scale structure of Ophiuchus supercluster" The Astrophysical Journal.

T. Hasekawa：“蛇夫座超星系团大规模结构的发现”《天体物理学杂志》。

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

DOI： 10.3847/1538-4357/aa8e9f

发表时间： 2017-05

期刊：

The Astrophysical Journal

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作者：

T. C. C. P. Ade-T.-C.-C.-P.-Ade-103029307;M. Aguilar;Y. Akiba;K. Arnold;C. Baccigalupi;D. Barron;D. Beck;F. Bianchini;D. Boettger;J. Borrill;S. Chapman;Y. Chinone;K. Crowley;A. Cukierman;M. Dobbs;A. Ducout;R. Dunner;T. Elleflot;J. Errard;G. Fabbian;S. Feeney;C. Feng;T. Fujino;N. Galitzki;A. Gilbert;N. Goeckner-wald;J. Groh;T. Hamada;G. Hall;N. Halverson;M. Hasegawa;M. Hazumi;C. Hill;L. Howe;Y. Inoue;G. Jaehnig;A. Jaffe;O. Jeong;D. Kaneko;N. Katayama;B. Keating;R. Keskitalo;T. Kisner;N. Krachmalnicoff;A. Kusaka;M. Jeune;A. Lee;E. Leitch;D. Leon;E. Linder;L. Lowry;F. Matsuda;T. Matsumura;Y. Minami;J. Montgomery;M. Navaroli;H. Nishino;H. Paar;J. Peloton;A. Pham;D. Poletti;G. Puglisi;C. Reichardt;P. Richards;C. Ross;Y. Segawa;B. Sherwin;M. Silva-Feaver;Praweeen Siritanasak;N. Stebor;R. Stompor;A. Suzuki;O. Tajima;S. Takakura;S. Takatori;D. Tanabe;G. Teply;T. Tomaru;C. Tucker;N. Whitehorn;A. Zahn

通讯作者：

YOKOHAMA

横滨

DOI： 10.1596/29393

发表时间： 2017

期刊：

A.B. Mitford and the Birth of Japan as a Modern State

影响因子： --

作者：

W. Mayers;H. Dennys;C. King

通讯作者：

C. King

Results of gravitational lensing and primordial gravitational waves from the POLARBEAR experiment

POLARBEAR 实验的引力透镜和原初引力波结果

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