HUBS: a dedicated hot circumgalactic medium explorer
| Autor: | Wei Cui, Joel Bregman, Marcel Bruijin, Liubiao Chen, Yang Chen, Chen Cui, Taotao Fang, Bo Gao, He Gao, Jian-Rong Gao, Luciano Gottardi, Kaixuan Gu, Fulai Guo, Jia Guo, Chunling He, Pengfei He, Jan-Willem A. den Herder, Qiushi Huang, Fajun Li, Jiangtao Li, Jinjin Li, Lingyun Li, Tipei Li, Wenbing Li, Jingtao Liang, Yajie Liang, Guiyun Liang, Yanjie Liu, Zhi Liu, Ziyao Liu, Felix Jaeckel, Li Ji, Wei Ji, Hai Jin, Xi Kang, Yuexue Ma, Dan McCammon, Houjun Mo, Kenichiro Nagayoshi, Kari Nelms, Ruizhe Qi, Jia Quan, Marcel Ridder, Zhengxiang Shen, Aurora Simionescu, Emanuele Taralli, Daniel Wang, Guole Wang, Junjie Wang, Kun Wang, Le Wang, Sifan Wang, Shijian Wang, Tinggui Wang, Wei Wang, Xiaoqiang Wang, Yongliang Wang, Yeru Wang, Zhen Wang, Zhanshan Wang, Ningyuan Wen, Martin de Wit, Shufan Wu, Da Xu, Dandan Xu, Haiguang Xu, Xiaojie Xu, Renxin Xu, Yongquan Xue, Shengzhen Yi, Jun Yu, Luwei Yang, Feng Yuan, Shuo Zhang, Wei Zhang, Zhong Zhang, Qing Zhong, Yu Zhou, Wenxiu Zhu |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Void (astronomy) Astrophysics::High Energy Astrophysical Phenomena media_common.quotation_subject Dark matter FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics 01 natural sciences Universe Galaxy Baryon Stars 0103 physical sciences Galaxy formation and evolution Astrophysics - Instrumentation and Methods for Astrophysics 010306 general physics Instrumentation and Methods for Astrophysics (astro-ph.IM) 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Galaxy cluster media_common |
| Zdroj: | Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray. |
| DOI: | 10.1117/12.2560871 |
| Popis: | The Hot Universe Baryon Surveyor (HUBS) mission is proposed to study "missing" baryons in the universe. Unlike dark matter, baryonic matter is made of elements in the periodic table, and can be directly observed through the electromagnetic signals that it produces. Stars contain only a tiny fraction of the baryonic matter known to be present in the universe. Additional baryons are found to be in diffuse (gaseous) form, in or between galaxies, but a significant fraction has not yet been seen. The latter (missing baryons) are thought to be hiding in low-density warm-hot ionized medium (WHIM), based on results from theoretical studies and recent observations, and be distributed in the vicinity of galaxies (i.e., circum-galactic medium) and between galaxies (i.e., intergalactic medium). Such gas would radiate mainly in the soft X-ray band and the emission would be very weak, due to its very low density. HUBS is optimized to detect the X-ray emission from the hot baryons in the circum-galactic medium, and thus fill a void in observational astronomy. The goal is not only to detect the missing baryons, but to characterize their physical and chemical properties, as well as to measure their spatial distribution. The results would establish the boundary conditions for understanding galaxy evolution. Though highly challenging, detecting missing baryons in the intergalactic medium could be attempted, perhaps in the outskirts of galaxy clusters, and could shed significant light on the large-scale structures of the universe. The current design of HUBS will be presented, along with the status of technology development. Comment: 12 pages, 7 figures, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, eds. J.A. den Herder, S. Nikzad, & K. Nakazawa, Proc. of SPIE Vol. 11444, 114442S |
| Databáze: | OpenAIRE |
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