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arXiv 1802.08073astro-ph.GA
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反常微波辐射(AME)研究现状

The State-of-Play of Anomalous Microwave Emission (AME) Research

Clive Dickinson, Y. Ali-Haïmoud, A. Barr, E. S. Battistelli, A. Bell, L. Bernstein, S. Casassus, K. Cleary, B. T. Draine, R. Génova-Santos, S. E. Harper, B. Hen… 展开作者

Clive Dickinson, Y. Ali-Haïmoud, A. Barr, E. S. Battistelli, A. Bell, L. Bernstein, S. Casassus, K. Cleary, B. T. Draine, R. Génova-Santos, S. E. Harper, B. Hensley, J. Hill-Valler, Thiem Hoang, F. P. Israel, L. Jew, A. Lazarian, J. P. Leahy, J. Leech, C. H. López-Caraballo, I. McDonald, E. J. Murphy, T. Onaka, R. Paladini, M. W. Peel, Y. Perrott, F. Poidevin, A. C. S. Readhead, J. -A. Rubiño-Martín, A. C. Taylor, C. T. Tibbs, M. Todorović, M. Vidal

摘要:

异常微波辐射(AME)是在$\approx 10$ -60 GHz频率范围内观测到的银河系漫射辐射的一个组成部分。AME于1996年首次被检测到,并于1997年被确认为排放的另一个组成部分。从那时起,AME已经通过一系列实验和各种环境中观察到。AME是空间相关的远红外热尘埃发射,但不能解释的同步或自由-自由发射机制,是远远超过发射贡献的热尘埃发射与幂律不透明度与所观察到的发射在亚毫米波长。极化观察表明,AME的极化非常弱($\lesssim 1$ %)。对AME最自然的解释是1957年首次假设的超小尘埃颗粒(“旋转尘埃”)的旋转发射。来自磁性颗粒材料的磁化的热波动的磁偶极子辐射也可能有助于AME,特别是在较高频率($\gtrsim 50$ GHz)下。AME也是宇宙微波背景分析的重要前景。本文介绍了AME研究的回顾和现状,这在2016年6月在荷兰ESTEC举行的AME研讨会上进行了讨论。

英文摘要:

Anomalous Microwave Emission (AME) is a component of diffuse Galactic radiation observed at frequencies in the range $\approx 10$-60 GHz. AME was first detected in 1996 and recognised as an additional component of emission in 1997. Since then, AME has been observed by a range of experiments and in a variety of environments. AME is spatially correlated with far-IR thermal dust emission but cannot be explained by synchrotron or free-free emission mechanisms, and is far in excess of the emission contributed by thermal dust emission with the power-law opacity consistent with the observed emission at sub-mm wavelengths. Polarization observations have shown that AME is very weakly polarized ($\lesssim 1$%). The most natural explanation for AME is rotational emission from ultra-small dust grains ("spinning dust"), first postulated in 1957. Magnetic dipole radiation from thermal fluctuations in the magnetization of magnetic grain materials may also be contributing to the AME, particularly at higher frequencies ($\gtrsim 50$ GHz). AME is also an important foreground for Cosmic Microwave Background analyses. This paper presents a review and the current state-of-play in AME research, which was discussed in an AME workshop held at ESTEC, The Netherlands, June 2016.

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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