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arXiv 0912.0621astro-ph.CO
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WMAP点源高频无线电极化测量

High-frequency radio polarization measurements of WMAP point sources

N. Jackson, I. W. A. Browne, R. A. Battye, D. Gabuzda, A. C. Taylor

摘要:

我们目前在8.4,22,和43 GHz的极化测量与VLA的一个完整的样本的河外源强于1 JY在5年的WMAP目录和-34度以北的赤纬。观测的动机是需要知道几十GHz频率的射电源的偏振特性,以便为未来敏感的宇宙微波背景(CMB)实验减去偏振前景。总的强度和偏振测量值一般是一致的可比VLA校准测量的可变性较小的来源,并在一个类似的范围内WMAP通量未解决的来源。另一篇论文将介绍测量参数之间的相关性,并得出CMB测量的影响。

英文摘要:

We present polarization measurements at 8.4, 22, and 43 GHz made with the VLA of a complete sample of extragalactic sources stronger than 1 Jy in the 5-year WMAP catalogue and with declinations north of -34 degrees. The observations were motivated by the need to know the polarization properties of radio sources at frequencies of tens of GHz in order to subtract polarized foregrounds for future sensitive Cosmic Microwave Background (CMB) experiments. The total intensity and polarization measurements are generally consistent with comparable VLA calibration measurements for less-variable sources, and within a similar range to WMAP fluxes for unresolved sources. A further paper will present correlations between measured parameters and derive implications for CMB measurements.

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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