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arXiv 2109.00614astro-ph.GAastro-ph.IM
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星系演化探测器

The Galaxy Evolution Probe

Jason Glenn, Charles M. Bradford, Erik Rosolowsky, Rashied Amini, Katherine Alatalo, Lee Armus, Andrew J. Benson, Tzu-Ching Chang, Jeremy Darling, Peter K. Day,… 展开作者

Jason Glenn, Charles M. Bradford, Erik Rosolowsky, Rashied Amini, Katherine Alatalo, Lee Armus, Andrew J. Benson, Tzu-Ching Chang, Jeremy Darling, Peter K. Day, Jeanette Domber, Duncan Farrah, Brandon Hensley, Sarah Lipscy, Bradley Moore, Seb Oliver, Joanna Perido, David Redding, Michael Rodgers, Raphael Shirley, Howard A. Smith, John B. Steeves, Carole Tucker, Jonas Zmuidzinas

摘要:

星系演化探测器是一个中远红外空间观测站的概念,目的是通过大规模和无偏差的调查来测量大样本星系的关键特性。GEP将利用一个6开尔文、2.0米的主镜和灵敏的动力学电感探测器阵列,试图实现黄道光和银河尘埃发射光子的本底有限观测。它将有两个仪器模块:一个光谱分辨率R = 8的10 - 400微米高光谱成像仪(GEP-I)和一个24 - 193微米R = 200的光栅光谱仪(GEP-S)。GEP-I巡天将通过热尘埃发射识别恒星形成星系,同时使用多环芳烃发射线测量红移。将测量每个来源的恒星形成和核超大质量黑洞吸积产生的星系光度,使宇宙恒星形成历史的测量精度比以前高得多。利用光学薄的远红外精细结构线,GEP-S测量将测量宇宙时间内星系中心金属丰度的增长,并将在当地宇宙的螺旋星系中绘制平面外气体的地图,以调查反馈过程。描述了为满足科学要求而设计的科学案例和任务架构,并描述了动态电感探测器和读出电子学的最新技术水平和所需的发展。本文取代了GEP概念研究报告中引用的新内容,包括:最近的中红外KID发展的总结,中红外KID的微透镜阵列制造的讨论,以及星系调查的额外背景。对更多技术细节感兴趣的读者可能想查阅概念研究报告。

英文摘要:

The Galaxy Evolution Probe (GEP) is a concept for a mid- and far-infrared space observatory to measure key properties of large samples of galaxies with large and unbiased surveys. GEP will attempt to achieve zodiacal light and Galactic dust emission photon background-limited observations by utilizing a 6 Kelvin, 2.0 meter primary mirror and sensitive arrays of kinetic inductance detectors. It will have two instrument modules: a 10 - 400 micron hyperspectral imager with spectral resolution R = 8 (GEP-I) and a 24 - 193 micron, R = 200 grating spectrometer (GEP-S). GEP-I surveys will identify star-forming galaxies via their thermal dust emission and simultaneously measure redshifts using polycyclic aromatic hydrocarbon emission lines. Galaxy luminosities derived from star formation and nuclear supermassive black hole accretion will be measured for each source, enabling the cosmic star formation history to be measured to much greater precision than previously possible. Using optically thin far-infrared fine-structure lines, surveys with GEP-S will measure the growth of metallicity in the hearts of galaxies over cosmic time and extraplanar gas will be mapped in spiral galaxies in the local universe to investigate feedback processes. The science case and mission architecture designed to meet the science requirements are described, and the kinetic inductance detector and readout electronics state of the art and needed developments are described. This paper supersedes the GEP concept study report cited in it by providing new content, including: a summary of recent mid-infrared KID development, a discussion of microlens array fabrication for mid-infrared KIDs, and additional context for galaxy surveys. The reader interested in more technical details may want to consult the concept study report.

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