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East Asian VLBI Network observations of active galactic nuclei jets:imaging with KaVA+Tianma+Nanshan

Research in astronomy and Astrophysics 2021年第8期21卷 220-234页

作者： yu-Zhu Cui Kazuhiro Hada Motoki Kino Bong-Won Sohn Jongho Park Hyun-Wook Ro Satoko Sawada-Satoh Wu Jiang Lang Cui Mareki Honma Zhi-Qiang Shen Fumie Tazaki Tao An Ilje Cho Guang-Yao zhao xiao-Peng Cheng Kotaro Niinuma Kiyoaki Wajima Ying-Kang Zhang Noriyuki Kawaguchi Juan-Carlos Algaba Shoko Koyama Tomoya Hirota Yoshinori Yonekura Nobuyuki Sakai Bo xia Yong-Bin Jiang lin-Feng yu Wei Gou Ju-Yeon Hwang Yong-Chen Jiang yun-xia Sun Dong-Kyu Jung Hyo-Ryoung Kim Jeong-Sook Kim Hideyuki Kobayashi Jee-Won Lee Jeong-Ae Lee Hua Zhang Guang-hui Li Zhi-Qiang Xu Peng Li Jung-Hwan Oh Se-Jin Oh Chung-Sik Oh Tomoaki Oyama Duk-Gyoo Roh Katsunori-M.Shibata Wen Guo Rong-Bing zhao Wei-Ye Zhong Jin-Qing Wang Wen-Jun Yang Hao Yan Jae-Hwan Yeom Bin Li xiao-Fei Li Jian-Ping yuan Jian Dong Zhong Chen Kazunori Akiyama Keiichi Asada Do-Young Byun Yoshiaki Hagiwara Jeffrey Hodgson Tae-Hyun Jung Kee-Tae Kim Sang-Sung Lee Kunwoo Yi Qing-hui liu xiang liu Ru-Sen Lu Masanori Nakamura Sascha Trippe Na Wang Xue-Zheng Wang Bo Zhang Department of Astronomical science The Graduate University for Advanced StudiesSOKENDAI2-21-1 OsawaMitakaTokyo 181-8588Japan Mizusawa VLBI Observatory National Astronomical Observatory of Japan2-12 HoshigaokaMizusawaOshuIwate 023-0861Japan Kogakuin university of Technology and Engineering Academic Support Center2665-1 NakanoHachiojiTokyo 192-0015Japan Korea astronomy and space science Institute Yuseong-guDaejeon 34055Korea Department of astronomy Yonsei University50 Yonsei-roSeodaemun-guSeoul 03722Korea Department of astronomy and space science University of Science and Technology217 Gajeong-roDaejeonKorea Institute of astronomy and Astrophysics Academia Sinica645 N Aohoku PIHiloHI 96720USA Graduate school of sciences and Technology for Innovation Yamaguchi UniversityYoshida 1677-1YamaguchiYamaguchi 753-8512Japan Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Key Laboratory of Radio astronomy Chinese Academy of SciencesNanjing 210008China Institute of astronomy The University of Tokyo2-21-1 OsawaMitakaTokyo 181-0015Japan Instituto de Astrofísica de Andalucía-CSIC Glorieta de la Astronomia s/nGranada E-18008Spain Department of Physics Faculty of ScienceUniversity of MalayaKuala Lumpur 50603Malaysia Center for astronomy Ibaraki University2-1-1 BunkyoMitoIbaraki 310-8512Japan space Light Laboratory 77Yangjaedae-ro 86 roadGangdong-guSeoulKorea Massachusetts Institute of Technology Haystack Observatory 99 Millstone RoadWestfordMA 01886USA National Radio astronomy Observatory 520 Edgemont RdCharlottesvilleVA 22903USA Toyo university 5-28-20 HakusanBunkyo-kuTokyo 112-8606Japan Department of Physics and astronomy Seoul National UniversityGwanak-guSeoul 08826Korea Max Planck Institute for Radio astronomy Auf dem hiigel 69Bonn 53121Germany SNU astronomy Research Center Seoul National UniversityGwanak-guSeoul 08826Korea

The East Asian Very Long Baseline Interferometry(VLBI) Network(EAVN) is a rapidly evolving international VLBI array that is currently promoted under joint efforts among china,Japan and *** aims at forming a joint VLBI Network by combining a large number of radio telescopes distributed over East Asian *** the combination of the Korean VLBI Network(KVN) and the VLBI Exploration of Radio Astrometry(VERA) into Ka VA,further expansion with the joint array in East Asia is actively *** we report the first imaging results(at 22 and 43 GHz) of bright radio sources obtained with Ka VA connected to Tianma 65-m and Nanshan 26-m Radio Telescopes in *** test the EAVN imaging performance for different sources,we observed four active galactic nuclei(AGN) having different brightness and *** a result,we confirmed that the Tianma 65-m Radio Telescope(TMRT) significantly enhances the overall array sensitivity,a factor of 4 improvement in baseline sensitivity and 2 in image dynamic range compared to the case of Ka VA *** addition of the Nanshan 26-m Radio Telescope(NSRT) further doubled the east-west angular *** the resulting high-dynamic-range,high-resolution images with EAVN(Ka VA+TMRT+NSRT),various fine-scale structures in our targets,such as the counter-jet in M87,a kink-like morphology of the 3 C 273 jet and the weak emission in other sources are successfully *** demonstrates the powerful capability of EAVN to study AGN jets and to achieve other science goals in *** expansion of EAVN will further enhance the angular resolution,detection sensitivity and frequency coverage of the network.

关键词： galaxies:active galaxies:jets instrumentation:interferometers radio continuum:galaxies

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First results on ^(76)Ge neutrinoless double beta decay from CDEX-1 experiment

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science china(Physics,Mechanics & astronomy) 2017年第7期60卷 53-59页

作者： Li Wang Qian yue KeJun Kang JianPing Cheng yuanJing Li TszKing Henry Wong ShinTed lin JianPing Chang JingHan Chen QingHao Chen yunHua Chen Zhi Deng Qiang Du hui Gong Li He QingJu He JinWei Hu Hanxiong Huang TengRui Huang LiPing Jia Hao Jiang HauBin Li Hong Li JianMin Li Jin Li Jun Li xia Li XueQian Li yuLan Li FongKay lin ShuKui liu Hao Ma JingLu Ma xingyu Pan Jie Ren xiChao Ruan ManBin Shen Vivek Sharma Lakhwinder Singh Manoj Kumar Singh Manoj Kumar Singh Arun Kumar Soma ChangJian Tang WeiYou Tang ChaoHsiung Tseng JiMin Wang Qing Wang ShiYong Wu yuCheng Wu HaoYang xing Yin Xu Tao Xue LiTao Yang SongWei Yang Nan Yi ChunXu yu HaiJun yu WeiHe Zeng xionghui Zeng Zhi Zeng Lan Zhang yunHua Zhang MingGang zhao Wei zhao JiFang Zhou ZuYing Zhou JingJun Zhu WeiBin Zhu ZhongHua Zhu Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics Tsinghua University Institute of Physics Academia Sinica school of Physical science and Technology Sichuan University NUCTECH Company YaLong River Hydropower Development Company Department of Nuclear Physics China Institute of Atomic Energy school of Physics Nankai University Department of Physics Banaras Hindu University

We report the first results on 76Ge neutrinoless double beta decay from stage one of the china dark-matter experiment （CDEX）. A p-type point-contact high-purity germanium detector with a mass of 994g has been installed to detect neutrinoless double beta decay events, as well as to directly detect dark matter particles. An exposure of 304kgd has been analyzed over a wide spectral band from 500keV to 3MeV. The average event rate obtained was about 0.012 counts per keV per kg per day over the 2.039MeV energy range. The half-life of76Ge neutrinoless double beta decay derived based on this result is 70v2〉6.4× 1022 yr （90%C.L.）. An upper limit on the effective Majorana-neutrino mass of 5.0eV has been achieved.

关键词： neutrinoless double beta decay CDEX point-contact germanium detector 76Ge isotope

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First experimental constraints on WIMP couplings in the effective field theory framework from CDEX

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science china(Physics,Mechanics & astronomy) 2021年第8期64卷 15-22页

作者： Yi Wang Zhi Zeng Qian yue LiTao Yang KeJun Kang yuanJing Li Mehment Agartioglu HaiPeng An JianPing Chang JingHan Chen yunHua Chen JianPing Cheng Cheng Yi Chiang WenHan Dai Zhi Deng ChangHao Fang xinPing Geng hui Gong QiuJu Guo Xuyuan Guo HongJian He Li He ShengMing He JinWei Hu TuChen Huang Hanxiong Huang HaiTao Jia LiPing Jia xi Jiang HauBin Li JianMin Li Jin Li MingXuan Li RenMingJie Li xia Li yuLan Li Bin Liao FongKay lin ShinTed lin ShuKui liu YanDong liu yu liu yuanyuan liu ZhongZhi liu Hao Ma yuCai Mao Qiyuan Nie JinHua Ning hui Pan NingChun Qi Jie Ren xiChao Ruan ChangSong Shang Vivek Sharma Ze She Lakhwinder Singh Monoj Kumar Singh Tianxi Sun ChangJian Tang WeiYou Tang Yang Tian GuangFu Wang Li Wang Qing Wang yu Chen Wang yunxiang Wang Zhen Wang Henry Tsz-King Wong ShiYong Wu yuCheng Wu HaoYang xing Yin Xu Tao Xue yuLu Yan Nan Yi ChunXu yu HaiJun yu JianFeng yue Ming Zeng BingTao Zhang Lei Zhang FengShou Zhang Zhenyu Zhang KangKang zhao MingGang zhao JiFang Zhou ZuYing Zhou JingJun Zhu Key Laboratory of Particle and Radiation Imaging(Ministry of Education) Department of Engineering PhysicsTsinghua UniversityBeijing 100084China Department of Physics Tsinghua UniversityBeijing 100084China Institute of Physics Academia SinicaTaipei 11529China NUCTECH Company Beijing 100084China YaLong River Hydropower Development Company Chengdu 610051China College of Nuclear science and Technology Beijing Normal UniversityBeijing 100875China College of Physics Sichuan UniversityChengdu 610065China school of Physics Peking UniversityBeijing 100871China Sino-French Institute of Nuclear and Technology Sun Yet-sen UniversityZhuhai 519082China Department of Nuclear Physics China Institute of Atomic EnergyBeijing 102413China Department of Physics Banaras Hindu UniversityVaranasi 221005India Department of Physics Beijing Normal UniversityBeijing 100875China school of Physics Nankai UniversityTianjin 300071China

We present weakly interacting massive particles(WIMPs) search results performed using two approaches of effective field theory from the china Dark Matter Experiment(CDEX), based on the data from both CDEX-1B and CDEX-10 stages. In the nonrelativistic effective field theory approach, both time-integrated and annual modulation analyses were used to set new limits for the coupling of WIMP-nucleon effective operators at 90% confidence level(C.L.) and improve over the current bounds in the low mχregion. In the chiral effective field theory approach, data from CDEX-10 were used to set an upper limit on WIMP-pion coupling at 90% C.L. We for the first time extended the limit to the m_(χ)<6 GeV/c^(2) region.

关键词： WIMP EFT CDEX dark matter annual modulation

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Panda X-III： Searching for neutrinoless double beta decay with high pressure ^(136)Xe gas time projection chambers

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science china(Physics,Mechanics & astronomy) 2017年第6期60卷 8-47页

作者： Xun Chen Chang Bo Fu Javier Galan Karl Giboni Franco Giuliani ling hui Gu Ke Han xiang Dong Ji Heng lin Jiang Lai liu Kai xiang Ni Hiroki Kusano xiang xiang Ren Shao Bo Wang Yong Yang Dan Zhang Tao Zhang Li zhao xiang Ming Sun Shou Yang Hu Si yu Jian xing Long Li xiao Mei Li Hao Liang Huan Qiao Zhang Ming Rui zhao Jing Zhou Ya Jun Mao Hao Qiao Si Guang Wang Ying yuan Meng Wang Amir N.Khan Neill Raper Jian Tang Wei Wang Jia Ning Dong Chang Qing Feng Cheng Li Jian Bei liu Shu Bin liu xiao Lian Wang Dan Yang Zhu Juan F.Castel Susana Cebri'an Theopisti Dafni Javier G.Garza Igor G.Irastorza Francisco J.Iguaz Gloria Luz ′on Hector Mirallas Stephan Aune Eric Berthoumieux Yann Bedfer Denis Calvet Nicole d'Hose Alain Delbart Maria Diakaki Esther Ferrer-Ribas Andrea Ferrero Fabienne Kunne Damien Neyret Thomas Papaevangelou Franck Sabatie Maxence Vanderbroucke AnDi Tan Wick Haxton yuan Mei Chinorat Kobdaj yu-Peng Yan NPAC and Department of Physics and astronomy Shanghai Jiao Tong University Shanghai Laboratory for Particle Physics and Cosmology Shanghai 200240 China College of Physical science and Technology Central China Normal University Wuhan 430079 China china Institute of Atomic Energy Beijing 102413 China school of Physics Peking University Beijing 100871 China school of Physics and Key Laboratory of Particle Physics and Particle Irradiation (MOE) Shandong University Jinan 250100 China school of Physics and Engineering Sun Yat-Sen University Guangzhou 510275 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei 230026 China university ofZaragoza C/P Cerbuna 12 50009 Zaragoza Spain IRFU CEA Universite Paris-Saclay F-91191 Gif-sur-Yvette France Department of Physics University of Maryland College Park MD 20742 USA Nuclear science Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA Center for Excellence in High Energy Physics and Astrophysics Suranaree University of Technology Nakhon Ratchasima 30000 Thailand

Searching for the neutrinoless double beta decay(NLDBD)is now regarded as the topmost promising technique to explore the nature of neutrinos after the discovery of neutrino masses in oscillation *** X-III(particle and astrophysical xenon experiment III)will search for the NLDBD of136Xe at the china Jin Ping Underground Laboratory(CJPL).In the first phase of the experiment,a high pressure gas Time Projection Chamber(TPC)will contain 200 kg,90%136Xe enriched gas operated at10 *** pitch micro-pattern gas detector(Microbulk Micromegas)will be used at both ends of the TPC for the charge readout with a cathode in the *** signals can be used to reconstruct the electron tracks of the NLDBD events and provide good energy and spatial *** detector will be immersed in a large water tank to ensure～5 m of water shielding in all *** second phase,a ton-scale experiment,will consist of five TPCs in the same water tank,with improved energy resolution and better control over backgrounds.

关键词： neutrinoless double beta decay lepton number violation underground experiment TPC Micromegas

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搜寻第二个地球——系外地球(ET)巡天计划

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空间科学学报 2024年第3期44卷 400-424页

作者：葛健陈雯陈永和宋宗玺王坚张辉李岩臧伟呈周丹张永帅陈琨阳应权毛淑德黄煦药新雨李兴隆姜海娇于涌唐正宏董峰高伟张鸿飞申超王峰涛魏传新杨宝玉李豫东文林张朋军张聪聪谢基伟马波邓洪平刘慧根段旭亮王昊宇黄江江高扬王伊菲王磊秦根健刘欣宇高婕中国科学院上海天文台上海200030 中国科学院微小卫星创新研究院上海201304 中国科学院上海技术物理研究所上海200083 中国科学院西安光学精密机械研究所西安710119 中国科学技术大学合肥230026 清华大学天文系北京100190 南昆士兰大学天体物理中心图文巴QLD4350 中国航天科技集团公司第八研究院803研究所上海201109 中国科学院新疆理化技术研究所乌鲁木齐830011 南京大学天文系南京210023 中山大学物理与天文学院珠海519082

系外地球科学卫星(ET)将通过采用空间大视场超高精度测光这一关键技术在国际上率先突破生命起源中的系外地球存在及其演化这一重大前沿科学问题. ET卫星将在日地拉格朗日L2点晕(Halo)轨道部署由6台广角凌星望远镜和1台微引力透镜望远镜... 详细信息

系外地球科学卫星(ET)将通过采用空间大视场超高精度测光这一关键技术在国际上率先突破生命起源中的系外地球存在及其演化这一重大前沿科学问题. ET卫星将在日地拉格朗日L2点晕(Halo)轨道部署由6台广角凌星望远镜和1台微引力透镜望远镜构成的空间天文台,结合凌星法和微引力透镜法,利用空间超大视场和超高精度的光学测光观测,首次发现富有重要意义、被广泛关注的系外地球,并确定其发生率,对目前了解甚少的类地行星和流浪行星进行国际上第一次大规模的种群普查,首次发现流浪地球,并确定其发生率,揭示类地行星和流浪行星起源,为地外生命探寻提供候选者和新方向. ET卫星的观测结果、统计研究以及和对理论的检验将回答系外地球在宇宙中有多普遍,类地行星是如何形成和演化的,流浪行星又是如何起源的这些亟待解决的前沿科学问题.对ET卫星发现的系外地球样本的后随观测,将精确测量其质量、密度和大气成分,有助于深入分析宜居性特征.此外,对ET新发现的大量各种系外行星样本的研究,以及对理论的检验将推动这些种类的行星形成和演化规律的更深入认识, ET的大量高精度、高频次和长基线测光数据将推动星震学、银河系考古学、时域天文学、双星和双星黑洞等领域的研究.

关键词：系外行星类地行星宜居带凌星微引力透镜测光

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高海拔宇宙线观测实验中scaler模式的模拟研究

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物理学报 2021年第19期70卷 352-359页

作者：黄志成周勋秀黄代绘贾焕玉陈松战马欣华刘栋阿西克古赵兵陈林王培汉西南交通大学物理科学与技术学院成都610031 西藏大学宇宙线教育部重点实验室拉萨850000 中国科学院高能物理研究所北京100049 山东大学前沿交叉科学青岛研究院青岛266237

位于四川省稻城县海子山的高海拔宇宙线观测站(LHAASO)包含3个子阵列,即地面粒子探测器阵列(KM2A)、水切伦科夫探测器阵列(WCDA)和广角大气切伦科夫望远镜阵列(WFCTA).作为LHAASO实验的主阵列,KM2A由5195个地面电磁粒子探测器(ED)和118... 详细信息

位于四川省稻城县海子山的高海拔宇宙线观测站(LHAASO)包含3个子阵列,即地面粒子探测器阵列(KM2A)、水切伦科夫探测器阵列(WCDA)和广角大气切伦科夫望远镜阵列(WFCTA).作为LHAASO实验的主阵列,KM2A由5195个地面电磁粒子探测器(ED)和1188个地下缪子探测器(MD)组成.对地面宇宙线观测实验来说,常有两种独立的数据采集模式,即shower模式和scaler模式.本文通过Monte Carlo方法,利用CORSIKA软件包和G4KM2A软件包,对KM2A-ED阵列中的scaler模式进行了模拟研究.当64个ED作为一个cluster、符合时间窗口为100 ns时,多重数m≥1,2,3和4的计数率分别约为88 kHz,1400 Hz,220 Hz和110 Hz.对scaler模式探测原初宇宙线的能量和有效面积也进行了模拟计算,发现KM2A-ED中多重数m≥1时探测原初质子的阈能可降低到100 GeV、有效面积高达100 m^(2).本模拟结果为LHAASO-KM2A实验中进行scaler模式的数据触发提供了具体方案,为后续的实验数据分析提供了信息.

关键词：宇宙线 Scaler模式 Monte Carlo模拟

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Paired quasi-periodic pulsations of hard X-ray emission in a solar flare

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science china(Physics,Mechanics & astronomy) 2023年第5期66卷 195-206页

作者： Hai-Sheng zhao Dong Li Shao-lin xiong Yan-Qiu Zhang Yang Su Wei Chen Yi zhao xiao-Bo Li Jia-Cong liu Wen-xi Peng Rui Qiao xin-Qiao Li xiang-Yang Wen Li-Ming Song Shi-Jie Zheng xin-Ying Song xiao-yun zhao yue Huang Shuang-Nan Zhang Shuo xiao Ce Cai Zheng-Hua An Can Chen Gang Chen Wei Chen Yan-Qi Du Min Gao Ke Gong Dong-Ya Guo Zhi-Wei Guo Jian-Jian He Bin Li Chao Li Chao-Yang Li Gang Li Jian-hui Li Lu Li Qing-xin Li Yan-Guo Li Jing Liang xiao-Hua Liang Jin-yuan Liao xiao-Jing liu Ya-Qing liu Qi Luo xiang Ma Bin Meng Ge Ou Dong-Li Shi Jing-Yan Shi Gong-xing Sun xi-Lei Sun You-Li Tuo Chen-Wei Wang hui Wang Jin Wang Jin-Zhou Wang Ping Wang Wen-Shuai Wang Hong Wu Sheng-Lun xie Yan-Bing Xu yu-Peng Xu Wang-Chen Xue Sheng Yang Min Yao Jian-Ying Ye Qi-Bin Yi Chao-yue Zhang Da-Li Zhang Fan Zhang Fei Zhang Hong-Mei Zhang Kai Zhang Peng Zhang xiao-Lu Zhang Zhen Zhang Guo-Ying zhao Shi-Yi zhao Chao Zheng xing Zhou yue Zhu Key Laboratory for Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China university of Chinese Academy of sciences Beijing 100049China Department of astronomy Beijing Normal UniversityBeijing 100875China school of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu 611756China Physics and space science College China West Normal UniversityNanchong 637002China Key Laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Institute of Astrophysics Central China Normal UniversityWuhan 430079China school of Physics Changchun University of Science and TechnologyChangchun 130022China College of Physics and Engineering Qufu Normal UniversityQufu 273165China College of Physics sciences&Technology Hebei UniversityBaoding 071002China

We investigate high time resolution data obtained by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)during the flare event on 2022 April 21 at 01:52 *** subpeaks with durations of 4-6 s have been detected in the hard X-ray precursor phase,and the key feature is that they appear in pairs and seem like double-peak *** subpeaks are rarely observed in hard X-ray band and confirmed by the microwave obtained by Nobeyama Radio Polarimeters(NoRP)and Radio Solar Telescope Network(RSTN).While an exponential function can describe the continuum component of the time profile from the precursor to part of the impulsive *** periods of quasi-periodic pulsations(QPPs)are detected to be about 7.3 and 12.8 s for the precursor and impulsive phase,respectively,with at least 95%confidence *** paired QPPs are assumed to be double-peak QPPs and then the scenario of current loop coalescence model is found to be in good agreement with our *** precursor phase can be interpreted as the oscillating coalescence of two islands,while the impulsive phase can be interpreted as more islands to coalesce one by one to form larger islands.

关键词： solar flare QPPs loop coalescence circular-ribbon flare

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The Solar Upper Transition Region Imager(SUTRI)Onboard the SATech-01 Satellite

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Research in astronomy and Astrophysics 2023年第6期23卷 153-171页

作者： xianyong Bai hui Tian yuanyong Deng Zhanshan Wang Jianfeng Yang xiaofeng Zhang Yonghe Zhang Runze Qi Nange Wang Yang Gao Jun yu Chunling He Zhengxiang Shen Lun Shen Song Guo Zhenyong hou Kaifan Ji xingzi Bi Wei Duan xiao Yang Jiaben lin Ziyao Hu Qian Song Zihao Yang Yajie Chen Weidong Qiao Wei Ge Fu Li Lei Jin Jiawei He xiaobo Chen xiaocheng Zhu Junwang He Qi Shi liu liu Jinsong Li Dongxiao Xu Rui liu Taijie Li Zhenggong Feng Yamin Wang Chengcheng Fan Shuo liu Sifan Guo Zheng Sun yuchuan Wu Haiyu Li Qi Yang yuyang Ye Weichen Gu Jiali Wu Zhe Zhang yue yu Zeyi Ye Pengfeng Sheng Yifan Wang Wenbin Li Qiushi Huang Zhong Zhang National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China school of astronomy and space science University of Chinese Academy of SciencesBeijing 101408China school of Earth and space sciences Peking UniversityBeijing 100871China Key Laboratory of Solar Activity and space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China Tongji university Institute of Precision Optical EngineeringSchool of Physics Science and EngineeringKey Laboratory of Advanced Micro-Structured Materials MOEShanghaiChina xi'an Institute of Optics and Precision Mechanics Chinese Academy of SciencesXi'an 710119China Innovation Academy for Microsatellites Chinese Academy of SciencesShanghai 201304China yunnan Observatories Chinese Academy of SciencesKunming650011China

The Solar Upper Transition Region Imager(SUTRI)onboard the space Advanced Technology demonstration satellite(SATech-01),which was launched to a Sun-synchronous orbit at a height of~500 km in 2022 July,aims to test the on-orbit performance of our newly developed Sc/Si multi-layer reflecting mirror and the 2k×2k EUV CMOS imaging camera and to take full-disk solar images at the Ne VII 46.5 nm spectral line with a filter width of~3 *** employs a Ritchey-Chrétien optical system with an aperture of 18 *** on-orbit observations show that SUTRI images have a field of view of~416×416 and a moderate spatial resolution of~8″without an image stabilization *** normal cadence of SUTRI images is 30 s and the solar observation time is about16 hr each day because the earth eclipse time accounts for about 1/3 of SATech-01's orbit ***15 GB data is acquired each day and made available online after *** images are valuable as the Ne VII 46.5 nm line is formed at a temperature regime of~0.5 MK in the solar atmosphere,which has rarely been sampled by existing solar *** observations will establish connections between structures in the lower solar atmosphere and corona,and advance our understanding of various types of solar activity such as flares,filament eruptions,coronal jets and coronal mass ejections.

关键词： Sun:transition region Sun:UV radiation Sun:activity space vehicles:instruments

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Feasibility and physics potential of detecting ^(8)B solar neutrinos at JUNO

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Chinese Physics C 2021年第2期45卷 93-110页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Sebastiano Aiello Muhammad Akram Nawab Ali Fengpeng An Guangpeng An Qi An Giuseppe Andronico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina Burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste Andrej Babic Wander Baldini Andrea Barresi Eric Baussan Marco Bellato Antonio Bergnoli Enrico Bernieri David Biare Thilo Birkenfeld Sylvie Blin David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Max Buesken Mario Buscemi Jose Busto Ilya Butorov Anatael Cabrera Hao Cai xiao Cai Yanke Cai Zhiyan Cai Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Jinfan Chang yun Chang Pingping Chen Po-An Chen Shaomin Chen Shenjian Chen Xurong Chen Yi-Wen Chen Yixue Chen yu Chen Zhang Chen Jie Cheng Yaping Cheng Alexander Chepurnov Davide Chiesa Pietro Chimenti Artem Chukanov Anna Chuvashova Gérard Claverie Catia Clementi Barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti Salvatore Costa Flavio Dal Corso Christophe De La Taille Jiawei Deng Zhi Deng Ziyan Deng Wilfried Depnering Marco Diaz Xuefeng Ding Yayun Ding Bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Georgy Donchenko Jianmeng Dong Damien Dornic Evgeny Doroshkevich Marcos Dracos Frédéric Druillole Shuxian Du Stefano Dusini Martin Dvorak Timo Enqvist Heike Enzmann Andrea Fabbri Lukas Fajt Donghua Fan Lei Fan Can Fang Jian Fang Marco Fargetta Anna Fatkina Dmitry Fedoseev Vladko Fekete Li-Cheng Feng Qichun Feng Richard Ford Andrey Formozov Amélie Fournier Haonan Gan Feng Gao Alberto Garfagnini Alexandre Göttel Christoph Genster Marco Giammarchi Agnese Giaz Nunzio Giudice Franco Giuliani Maxim Gonchar Guanghua Gong hui Gong Oleg Gorchakov yuri Gornushkin Marco Grassi Christian Grewing Maxim Gromov Vasily Gromov Minghao Gu xiaofei Gu yu Gu Mengyun Guan Nunzio Guardone Maria Gul Cong Guo Jingyuan Guo Wanlei Guo xinheng Guo yuhang Guo Paul Hackspacher Caren Hagner Ran Han Yan Yerevan Physics Institute YerevanArmenia UniversitéLibre de Bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro RioBrazil Pontificia Universidad Católica de Chile SantiagoChile Universidad Tecnica Federico Santa Maria ValparaisoChile Beijing Institute of spacecraft Environment Engineering BeijingChina Beijing Normal university BeijingChina china Institute of Atomic Energy BeijingChina Institute of High Energy Physics BeijingChina North china Electric Power university BeijingChina school of Physics Peking UniversityBeijingChina Tsinghua university BeijingChina university of Chinese Academy of sciences BeijingChina Jilin university ChangchunChina College of Electronic science and Engineering National University of Defense TechnologyChangshaChina Chongqing university ChongqingChina Dongguan university of Technology DongguanChina Jinan university GuangzhouChina Sun Yat-Sen university GuangzhouChina Harbin Institute of Technology HarbinChina university of science and Technology of china HefeiChina The Radiochemistry and Nuclear Chemistry Group in university of South china HengyangChina Wuyi university JiangmenChina Shandong university JinanChina Institute of Modern Physics Chinese Academy of SciencesLanzhouChina nanjing university NanjingChina Guangxi university NanningChina East china university of science and Technology ShanghaiChina school of Physics and astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuangChina Nankai university TianjinChina Wuhan university WuhanChina xi’an Jiaotong university Xi’anChina xiamen university XiamenChina school of Physics and Microelectronics Zhengzhou UniversityZhengzhouChina Institute of Physics National Chiao-Tung university Hsinchu National United university Miao-Li Department of Physics National T

The Jiangmen Underground Neutrino Observatory(JUNO)features a 20 kt multi-purpose underground liquid scintillator sphere as its main *** of JUNO's features make it an excellent location for^8B solar neutrino measurements,such as its low-energy threshold,high energy resolution compared with water Cherenkov detectors,and much larger target mass compared with previous liquid scintillator *** this paper,we present a comprehensive assessment of JUNO's potential for detecting^8B solar neutrinos via the neutrino-electron elastic scattering process.A reduced 2 MeV threshold for the recoil electron energy is found to be achievable,assuming that the intrinsic radioactive background^(238)U and^(232)Th in the liquid scintillator can be controlled to 10^(-17)g/*** ten years of data acquisition,approximately 60,000 signal and 30,000 background events are *** large sample will enable an examination of the distortion of the recoil electron spectrum that is dominated by the neutrino flavor transformation in the dense solar matter,which will shed new light on the inconsistency between the measured electron spectra and the predictions of the standard three-flavor neutrino oscillation *** m^(2)_(21)=4.8times10^(-5);(7.5times10^(-5))eV^(2),JUNO can provide evidence of neutrino oscillation in the Earth at approximately the 3sigma(2sigma)level by measuring the non-zero signal rate variation with respect to the solar zenith ***,JUNO can simultaneously measureDelta m^2_(21)using^8B solar neutrinos to a precision of 20% or better,depending on the central value,and to sub-percent precision using reactor antineutrinos.A comparison of these two measurements from the same detector will help understand the current mild inconsistency between the value of Delta m^2_(21)reported by solar neutrino experiments and the KamLAND experiment.

关键词： neutrino oscillation solar neutrino JUNO

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平场数据采集间隔对莱曼阿尔法太阳望远镜平场精度的影响分析

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天文学报 2020年第4期61卷 67-76页

作者：李敬伟黎辉封莉李瑛黄宇赵洁卢磊应蓓丽薛建朝杨雨桐中国科学院紫金山天文台暗物质与空间天文重点实验室南京21002 中国科学技术大学天文与空间科学学院合肥230026

莱曼阿尔法太阳望远镜(LST)是先进天基太阳天文台(ASO-S)卫星的载荷之一,它包括白光太阳望远镜(WST),全日面太阳成像仪(SDI)和日冕仪(SCI)等仪器.1991年Kuhn,lin和Loranz提出的方法(简称KLL方法)是WST和SDI在轨平场定标的方法之一.为了... 详细信息

莱曼阿尔法太阳望远镜(LST)是先进天基太阳天文台(ASO-S)卫星的载荷之一,它包括白光太阳望远镜(WST),全日面太阳成像仪(SDI)和日冕仪(SCI)等仪器.1991年Kuhn,lin和Loranz提出的方法(简称KLL方法)是WST和SDI在轨平场定标的方法之一.为了研究WST和SDI的平场定标精度对KLL方法的相邻位置时间间隔的敏感性,使用太阳动力学观测卫星(SDO)的日震和磁成像仪(HMI)及太阳大气成像仪(AIA)的全日面成像观测数据测试和分析在使用KLL方法时相邻位置时间间隔对所得平场精度的影响.结果显示在LST使用KLL方法进行平场定标时,相邻位置时间间隔越短越好.具体分析表明,WST平场精度对相邻位置采样时间间隔不敏感,而SDI时间间隔需要在240 s范围内.分析结果对卫星姿态调整到稳定所需的时间给出了一定限制.

关键词：太阳:耀斑太阳:日冕物质抛射技术:平场望远镜:莱曼阿尔法太阳望远镜

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