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arXiv 1909.01592astro-ph.COastro-ph.GAastro-ph.IM
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利用CMB作为背光绘制整个可观测宇宙的空间任务

A Space Mission to Map the Entire Observable Universe using the CMB as a Backlight

Kaustuv Basu, Mathieu Remazeilles, Jean-Baptiste Melin, David Alonso, James G. Bartlett, Nicholas Battaglia, Jens Chluba, Eugene Churazov, Jacques Delabrouille,… 展开作者

Kaustuv Basu, Mathieu Remazeilles, Jean-Baptiste Melin, David Alonso, James G. Bartlett, Nicholas Battaglia, Jens Chluba, Eugene Churazov, Jacques Delabrouille, Jens Erler, Simone Ferraro, Carlos Hernández-Monteagudo, J. Colin Hill, Selim C. Hotinli, Ildar Khabibullin, Mathew Madhavacheril, Tony Mroczkowski, Daisuke Nagai, Srinivasan Raghunathan, Jose Alberto Rubino Martin, Jack Sayers, Douglas Scott, Naonori Sugiyama, Rashid Sunyaev, Íñigo Zubeldia

摘要:

这份科学白皮书是响应欧空局2050年航行计划关于长期飞行任务规划的呼吁而编写的,其目的是描述利用L级空间观测站可以实现的各种科学可能性,该观测站专门研究宇宙微波背景光子与宇宙网的相互作用。我们的目标是利用CMB作为背光,通过分析其上的空间和光谱失真来测量整个可观测宇宙的气体、总质量和恒星含量。这些失真是由两个影响CMB光子的主要过程引起的:电子散射(不同形式的Sunyaev-Zeldovich效应、瑞利散射、共振散射)和引力势偏转(透镜效应)。尽管本白皮书中收集的主题清单并不详尽,但它有助于说明空间飞行任务可以解决的重大科学问题的异常多样性,该空间飞行任务将达到1.5弧分的角分辨率(目标1弧分),平均灵敏度优于1 uK-arcmin,微波频率范围从大约50 GHz到1 THz。目前的文件还强调了我们的“微光”任务概念与几个即将到来的和拟议的地基CMB实验的协同作用。

英文摘要:

This Science White Paper, prepared in response to the ESA Voyage 2050 call for long-term mission planning, aims to describe the various science possibilities that can be realized with an L-class space observatory that is dedicated to the study of the interactions of cosmic microwave background (CMB) photons with the cosmic web. Our aim is specifically to use the CMB as a backlight -- and survey the gas, total mass, and stellar content of the entire observable Universe by means of analyzing the spatial and spectral distortions imprinted on it. These distortions result from two major processes that impact on CMB photons: scattering by electrons (Sunyaev-Zeldovich effect in diverse forms, Rayleigh scattering, resonant scattering) and deflection by gravitational potential (lensing effect). Even though the list of topics collected in this White Paper is not exhaustive, it helps to illustrate the exceptional diversity of major scientific questions that can be addressed by a space mission that will reach an angular resolution of 1.5 arcmin (goal 1 arcmin), have an average sensitivity better than 1 uK-arcmin, and span the microwave frequency range from roughly 50 GHz to 1 THz. The current paper also highlights the synergy of our BACKLIGHT mission concept with several upcoming and proposed ground-based CMB experiments.

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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