Subjects: Astronomy >> Astrophysical processes submitted time 2023-06-07 Cooperative journals: 《天文学进展》
Abstract: Exoplanets, as a significant section of researching the evolution of stars and finding the origin of life, have been one of the hotspots in the field of astronomy for many years. At present, nearly ten methods for detecting exoplanets have been developed. More than 4 000 exoplanets have been detected since 1992, as astronomical observatories have become more accurate. In recent years, space-based astronomical observation methods have become mature, while the precision and efficiency of detecting exoplanets have been greatly improved, which leads to the emergence of more ground-based exoplanet exploration projects. Following Kepler, the most successful exoplanets probe satellite, TESS was successfully launched in April 2018, then lots of astronomers and ground-based optical equipments around the world devoted in TESS photometric and spectroscopic observations, which ushered in the “golden age” of exoplanets detection and research. In this review, we introduce the methods and representative programs of exoplanets detection, summarize the research and evolution theory of earth-like planets and gas giant planets. At last, the research of exoplanets in the next 5―10 years are prospected.
Subjects: Astronomy >> Astrophysical processes submitted time 2020-01-06 Cooperative journals: 《天文研究与技术》
Abstract: “墨子号”量子科学实验卫星(简称“墨子号”)是国际首颗从事空间尺度量子科学实验的卫星。“墨子号”和4个量子科学实验光学地面站及一个量子隐形传态光学地面站构建了天地一体化量子科学实验平台。为了实现各地面站的综合协调工作,需要研制一套量子科学实验光学地面站综合控制系统(简称地面站综合控制系统)。地面站综合控制系统涉及4个量子科学实验光学地面站,包括2个新建地面站和2个改造地面站,需要对其实现统一的接口和平台控制。本文参考了国际标准接口,针对量子科学实验光学地面站的功能需求,采用分层和模块化的设计方法,将地面站综合控制系统分为:Web服务层,网络交互层和设备控制层。设计完成的地面站综合控制系统实现了以下功能:(1)科学数据的发布;(2)内外数据的交互;(3)量子科学实验卫星项目科学实验计划的解析执行;(4)测站环境和设备状况的监测。作为量子科学实验光学地面站的统一控制平台,地面站综合控制系统为量子科学实验光学地面站的全面协调控制提供了有力保障和支持,同时作为通用的地面站控制系统,具有便于向其他望远镜控制系统移植的优点。
Subjects: Astronomy >> Astrophysical processes submitted time 2020-01-06 Cooperative journals: 《天文研究与技术》
Abstract:我们设计并构建了基于观测图像识别的望远镜智能故障辅助诊断系统,通过收集望远镜在观测时的故障图像与传感器信息来综合判断望远镜在观测时所产生的故障,并给出相应的解决建议。我们利用卷积神经网络方法进行图像智能识别,并使用故障树分析法寻找望远镜系统的薄弱点。经过仿真与实测检验,证明了系统能够有效地发现判断故障并给出建议,提高了望远镜的可靠性,为故障诊断技术智能化做好了铺垫。
Subjects: Astronomy >> Astrophysical processes submitted time 2019-04-17 Cooperative journals: 《天文研究与技术》
Abstract: 对新疆天文台(XAO)南山一米大视场天文望远镜(NOWT)观测的历史数据,我们进行细致的数据挖掘,发现了百余颗变源。数据处理pipeline为XAO时域巡天数据处理包,该处理包同时考虑了测光系统内部权重和相关性,并结合快速混合算法编写的。除去已知的变源,我们发现了很多新的变源。对新变源证认的过程中,我们将结果与LAMOST、GCVS、VSX、Gaia DR2等星表进行了交叉。在讨论部分,我们对各星表的使用情况给出了说明。对于新源最后发现绝大部分是食双星,少部分是脉动变星,并有一颗表现相对复杂的变源。