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arXiv 0903.0345astro-ph.CO
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扩展普朗克任务的B模式探测

B-mode Detection with an Extended Planck Mission

George Efstathiou, Steven Gratton

摘要:

普朗克卫星的标称任务寿命为14个月,可以对天空进行两次完整的调查。在这里,我们调查的潜力,一个扩展的普朗克任务的四个天空调查,以约束原始的B模式各向异性的存在下,占主导地位的银河偏振前景发射。扩展的普朗克任务能够在低多极下对原始B模式进行强有力的约束,这是地面或亚轨道实验无法探测的。一个张量标量比r=0.05可以检测到在一个高的显着性水平,由一个扩展的普朗克任务,它应该有可能设置一个95%的上限r为0.03,如果张量标量比是消失的小。此外,将普朗克飞行任务扩展到四次巡天,可以更好地控制极化的银河尘埃发射,因为除了353 GHz信道外,217 GHz频带还可以用作有效的尘埃模板。

英文摘要:

The Planck satellite has a nominal mission lifetime of 14 months allowing two complete surveys of the sky. Here we investigate the potential of an extended Planck mission of four sky surveys to constrain primordial B-mode anisotropies in the presence of dominant Galactic polarized foreground emission. An extended Planck mission is capable of powerful constraints on primordial B-modes at low multipoles, which cannot be probed by ground based or sub-orbital experiments. A tensor-scalar ratio of r=0.05 can be detected at a high significance level by an extended Planck mission and it should be possible to set a 95% upper limit on r of 0.03 if the tensor-scalar ratio is vanishingly small. Furthermore, extending the Planck mission to four sky surveys offers better control of polarized Galactic dust emission, since the 217 GHz frequency band can be used as an effective dust template in addition to the 353 GHz channel.

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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