天文学进展2024，Vol.42Issue(2)：371-382,12.DOI:10.3969/j.issn.1000-8349.2024.02.13
面向下一代事件视界望远镜的亚毫米波望远镜的选址与评估
Site Selection and Evaluation of Submillimeter Wave Telescopes for Next-Generation Event Horizon Telescopes
摘要
Abstract
In 2019,the Event Horizon Telescope(EHT)used very long baseline interfer-ometry to capture the first-ever image of a black hole.To meet the demand for dynamic imaging of black holes,the next generation of the EHT array will incorporate more stations located in the eastern hemisphere.The Tibet Plateau in China is the highest region on average elevation in the world,and its unique meteorological conditions make it a potential candidate for site selection.In this paper,we conducted a preliminary evaluation of the high-frequency radio observation conditions in the Tibet Plateau region using MERRA-2 data from the past three years(2019-2021),consisting of 759 data grid points.Based on the opacity performance of these grid points in different seasons,we selected the optimal grid points for each of the four seasons.In addition to the meteorological conditions of the already established sites,we evaluated these four grid points based on three meteorological factors:precipitable water vapor(PWV),liquid water path(LWP),and wind speed.Furthermore,using the meteorological conditions of the Atacama Large Millimeter/submillimeter Array(ALMA)as a standard,we defined the preliminary range for the site selection of the new station.关键词
EHT/不透明度/可降水量/液态水路径Key words
EHT/opacity/PWV/LWP分类
天文与地球科学引用本文复制引用
程远,路如森,沈志强,于威..面向下一代事件视界望远镜的亚毫米波望远镜的选址与评估[J].天文学进展,2024,42(2):371-382,12.基金项目
国家自然科学基金(11933007) （11933007）
中国科学院基础前沿科学研究计划从0到1原始创新项目(ZDBS-LY-SLH011) （ZDBS-LY-SLH011）
上海市基础研究特区计划(JCYJ-SHFY-2021-013) （JCYJ-SHFY-2021-013）
中德马普伙伴小组项目 （）
