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arXiv 1807.02199astro-ph.CO
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用South Pole的BICEP/Keck实验测量度标度B模偏振

Measurements of Degree-Scale B-mode Polarization with the BICEP/Keck Experiments at South Pole

Keck Collaboration, P. A. R. Ade, Z. Ahmed, R. W. Aikin, K. D. Alexander, D. Barkats, S. J. Benton, C. A. Bischoff, J. J. Bock, H. Boenish, R. Bowens-Rubin, J. … 展开作者

Keck Collaboration, P. A. R. Ade, Z. Ahmed, R. W. Aikin, K. D. Alexander, D. Barkats, S. J. Benton, C. A. Bischoff, J. J. Bock, H. Boenish, R. Bowens-Rubin, J. A. Brevik, I. Buder, E. Bullock, V. Buza, J. Connors, J. Cornelison, B. P. Crill, M. Crumrine, M. Dierickx, L. Duband, C. Dvorkin, J. P. Filippini, S. Fliescherj J. Grayson, G. Hall, M. Halpern, S. Harrison, S. R. Hildebrandt, G. C. Hilton, H. Hui, K. D. Irwin, J. Kang, K. S. Karkare, E. Karpel, J. P. Kaufman, B. G. Keating, S. Kefeli, S. A. Kernasovskiy, J. M. Kovac, C. L. Kuo, K. Lau, N. A. Larsen, E. M. Leitch, M. Lueker, K. G. Megerian, L. Moncelsi, T. Namikawa, B. Netterfield, H. T. Nguyen, R. O'Brient, R. W. Ogburn, S. Palladino, C. Pryke, B. Racine, S. Richter, R. Schwarz, A. Schillaci, C. D. Sheehy, A. Soliman, T. St. Germaine, Z. K. Staniszewski, B. Steinbach, R. V. Sudiwala, G. P. Teply, K. L. Thompson, J. E. Tolan, C. Tucker, A. D. Turner, C. Umilta, A. G. Vieregg, A. Wandui, A. C. Weber, D. V. Wiebe, J. Willmert, C. L. Wong, W. L. K. Wu, H. Yang, K. W. Yoon, C. Zhang

摘要:

BICEP和Keck阵列实验是一套小孔径折射望远镜,从南极观测微波天空。他们的目标是原始引力波在宇宙微波背景(CMB)中留下的度标度B模式偏振信号。这样的测量将有助于揭示早期宇宙的物理学。虽然BICEP 2首次观测到150 GHz的B模式信号,但普朗克卫星的更高频率表明,这可能完全是由于银河系尘埃的偏振发射,尽管不确定性仍然很高。凯克阵列已经观测同一区域的天空数年,增加了探测器数量,产生了迄今为止最深的偏振CMB地图。2014年安装了95 GHz的新探测器,2015年安装了220 GHz的新探测器。这些观测结果使得更好地约束银河系前景发射,如这里所示。2015年,BICEP 2被BICEP 3取代,后者是一个在95 GHz观测的高通量望远镜,而凯克阵列现在专注于更高的频率。在不久的将来,BICEP阵列将取代凯克阵列,并将允许前所未有的灵敏度的引力波信号。南极望远镜(SPT)的高分辨率观测也将用于消除对B模式的透镜贡献。

英文摘要:

The BICEP and Keck Array experiments are a suite of small-aperture refracting telescopes observing the microwave sky from the South Pole. They target the degree-scale B-mode polarization signal imprinted in the Cosmic Microwave Background (CMB) by primordial gravitational waves. Such a measurement would shed light on the physics of the very early universe. While BICEP2 observed for the first time a B-mode signal at 150 GHz, higher frequencies from the Planck satellite showed that it could be entirely due to the polarized emission from Galactic dust, though uncertainty remained high. Keck Array has been observing the same region of the sky for several years, with an increased detector count, producing the deepest polarized CMB maps to date. New detectors at 95 GHz were installed in 2014, and at 220 GHz in 2015. These observations enable a better constraint of galactic foreground emissions, as presented here. In 2015, BICEP2 was replaced by BICEP3, a 10 times higher throughput telescope observing at 95 GHz, while Keck Array is now focusing on higher frequencies. In the near future, BICEP Array will replace Keck Array, and will allow unprecedented sensitivity to the gravitational wave signal. High resolution observations from the South Pole Telescope (SPT) will also be used to remove the lensing contribution to B-modes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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