EXCLAIM（低温大口径强度映射实验）概述与现状
天体物理仪器与方法
2021-01-29 v1
摘要
低温大口径强度映射实验（EXCLAIM）是一台气球载远红外望远镜，将对宇宙时间尺度上的恒星形成历史进行巡天，以增进我们对为何在红移 z < 2 时恒星形成率下降、尽管暗物质持续成团的理解。具体而言，EXCLAIM 将在一红移区间 0 < z < 3.5 的窗口内绘制红移一氧化碳与单次电离碳谱线的发射图，遵循一种称为强度映射的创新方法。强度映射测量累积谱线发射亮度涨落的统计量，而非探测单个星系，从而实现对该发射气体的盲、完备普查。为明确探测此发射，EXCLAIM 将与一个光谱星系星表进行交叉相关。该任务采用低温设计，将望远镜光学系统冷却至约 1.7 K。望远镜配备 90 cm 主镜，以探测天空中从线性区到散粒噪声主导尺度的空间尺度。望远镜光学元件耦合至六个 {\mu}-Spec 光谱仪模块，工作于 420–540 GHz 频段，光谱分辨率 512，并采用微波动力学电感探测器。基线设计中由射频系统级芯片（RFSoC）读出探测器。低温望远镜与灵敏探测器使 EXCLAIM 能在上层大气低发射的光谱窗口达到高灵敏度。本文给出自 2019 年初 EXCLAIM 项目启动以来任务设计与研制状态的概述。
引用
@article{arxiv.2101.11734,
title = {Overview and status of EXCLAIM, the experiment for cryogenic large-aperture intensity mapping},
author = {Giuseppe Cataldo and Peter Ade and Christopher Anderson and Alyssa Barlis and Emily Barrentine and Nicholas Bellis and Alberto Bolatto and Patrick Breysse and Berhanu Bulcha and Jake Connors and Paul Cursey and Negar Ehsan and Thomas Essinger-Hileman and Jason Glenn and Joseph Golec and James Hays-Wehle and Larry Hess and Amir Jahromi and Mark Kimball and Alan Kogut and Luke Lowe and Philip Mauskopf and Jeffrey McMahon and Mona Mirzaei and Harvey Moseley and Jonas Mugge-Durum and Omid Noroozian and Trevor Oxholm and Ue-Li Pen and Anthony Pullen and Samelys Rodriguez and Peter Shirron and Gage Siebert and Adrian Sinclair and Rachel Somerville and Ryan Stephenson and Thomas Stevenson and Eric Switzer and Peter Timbie and Carole Tucker and Eli Visbal and Carolyn Volpert and Edward Wollack and Shengqi Yang},
journal= {arXiv preprint arXiv:2101.11734},
year = {2021}
}
备注
SPIE Astronomical Telescopes + Instrumentation. arXiv admin note: substantial text overlap with arXiv:1912.07118