• article-nadcFAST第十二批科学数据开放
    complex 79 PT2021_0125 Xueli Miao Search for White Dwarf Pulsars 80 ...
    PT2021_0126 Pengfei Wang Timing newly discovered millisecond pulsars in GPPS 81 ...
    83 PT2021_0129 Thankful Cromartie Continued Timing of Six NANOGrav Pulsars 84 ...
    Lin Wang Monitoring Pulsars in the globular cluster M13 and mass measurement of M13F 84 ...
    Dejiang Zhou Positioning and Polarization Observations for Known RRATs with FAST 97 ...
  • article-nadcFAST第十六批科学数据开放
    Zhao Rushuang The research of nulling behavior of new pulsars detected in CRAFTS 80 ...
    PT2022_0141 Niu Jiarui The Enigmatic Birth Properties of Pulsars 81 PT2022_ ...
    0147 Yu Niankun The Possible Existence and Formation of the Polar Ring in NGC 2685 84 ...
    PT2022_0186 Nannan Cai Timing of 48 long-period pulsars discovered by the GPPS survey 97 ...
    PT2022_0192 Yogesh Chandola HI content of young starburst blueberry galaxies 99 ...
  • article-nadcFAST第十一批科学数据
    79 PT2021_0118 Yang Yang Deep Mapping of Diffuse HI in M86 group 80 ...
    Low Surface Brightness Galaxies at Low-velocity end of Baryonic Tully-Fisher Relation 81 ...
    0127 Zheng Zheng Extragalactic HI absorption survey towards compact radio sources 84 ...
    96 PT2021_0147 Nannan Yue HINSA Zeeman observation towards W3(OH) 97 ...
    PT2021_0149 Chuan-Peng Zhang To detect HINSA in a prestellar core G157.25-01.00 99 ...
  • article-nadcFAST第十五批科学数据开放
    0100 RuiLuo Observing the candidate repeating sources from the CHIME/FRB Catalog 80 ...
    LinJie Searching for radio pulsations from the redback millisecond pulsar candidate 81 ...
    AlexanderWolszczan High-Cadence Timing Observations of the Planets Pulsar, PSR B1257+12 84 ...
    polarization and single-pulse characteristics for the whole pulse phase radiation pulsar. 97 ...
    98 PT2022_0124 ZhouZurong Long-term timing of six MSPs in Globular Clusters 99 ...
  • article-nadc研究人员基于LAMOST数据揭示富钡恒星的起源
    钡元素（Ba）是恒星演化过程中以慢中子俘获过程为主形成的重元素（原子序数为56）。钡元素的形成主要发生在小质量恒星演化晚期的渐进巨星分支（AGB）阶段，主要通过AGB阶段恒星内部的核反应过程产生。
    图1 LAMOST DR5样本中的矮星和亚巨星在[Fe/H]-[Ba/Fe]化学丰度上的分布，大多数恒星的[Ba/Fe]在0.0左右（太阳丰度比），但是在同样[Fe/H]下，Ba与Fe的丰度比也有很大的跨度 ...
    （4-5个数量级），有部分恒星的[Ba/Fe]丰度显著偏高（[Ba/Fe]>1.0）。
    图 2 LAMOST矮星和亚巨星的C、N元素丰度随金属丰度的分布，等值线表示的是Ba元素丰度正常的恒星，带颜色的点表示富Ba恒星，颜色表示温度。
  • metadatamulti-channel near infrared solar spectrometer
    The Multi-channel near infrared solar spectrometer (miss),which was built in the 1970 s, after the 80 ...
    s and 90 s, in 2015 (the latest upgrade) in this century, now developed into five wavebands (Hα 6563 ...
  • metadataLAMOST Observations in 15 K2 Campaigns. I. Low-resolution Spectra from LAMOST DR6
    LAMOST data release 6 (DR6) with that of the K2 approved targets, we found 160,619 usable spectra of 84,012 ...
    The internal uncertainties were estimated to be 81 K, 0.15 dex, 0.09 dex, and 5 km s<SUP>-1</SUP>, respectively ...
  • metadataLAMOST Observations in 15 K2 Campaigns. I. Low-resolution Spectra from LAMOST DR6
    LAMOST data release 6 (DR6) with that of the K2 approved targets, we found 160,619 usable spectra of 84,012 ...
    The internal uncertainties were estimated to be 81 K, 0.15 dex, 0.09 dex, and 5 km s<SUP>-1</SUP>, respectively ...
  • metadataLAMOST Observations in 15 K2 Campaigns. I. Low-resolution Spectra from LAMOST DR6
    LAMOST data release 6 (DR6) with that of the K2 approved targets, we found 160,619 usable spectra of 84,012 ...
    The internal uncertainties were estimated to be 81 K, 0.15 dex, 0.09 dex, and 5 km s<SUP>-1</SUP>, respectively ...
  • metadataLAMOST Observations in 15 K2 Campaigns. I. Low-resolution Spectra from LAMOST DR6
    LAMOST data release 6 (DR6) with that of the K2 approved targets, we found 160,619 usable spectra of 84,012 ...
    The internal uncertainties were estimated to be 81 K, 0.15 dex, 0.09 dex, and 5 km s<SUP>-1</SUP>, respectively ...
  • article-nadc新一届国科大多波段天文观测和数据处理开课
    3月5日，新一届国科大研究生一级学科核心课程《多波段天文观测与数据处理》正式开课，84名研究生选修。该课程涉及到实测天体物理方法，观测数据的获取、处理和分析，实用性很强。
  • article-nadc天文学家基于LAMOST数据揭示银河系早期形成和演化历史
    薄盘的形成是一个持久而有序的过程，从大约80-100亿年前一直持续至今。然而，这些图像主要来自数值模拟以及人们对碎片化观测证据的推测。
    研究团队发现，这两组恒星的年龄以大约80亿年为界同样清晰地被分成截然不同的两组。
    也就是说，从时间上看，银河系的集成和演化历史分成两个明确的阶段，从130亿年前到80亿年前的早期阶段和80亿年前至今的晚期阶段。早期阶段形成了银河系的厚盘和银晕，晚期阶段形成了银河系薄盘。
    图2：银河早期集成和演化图像示意图：138亿年前宇宙大爆炸，130亿年前厚盘开始形成，110亿年前银晕形成，80亿前至今银河薄盘形成。
    （图源：喻京川） 经进一步研究，向茂盛等人还发现虽然厚盘的形成一直持续了从130亿年前到80亿年前的大约50亿年时间，期间金属元素含量增加了30倍。
  • metadataBIPM Circular T
    Circular T provides the values of the differences [UTC – UTC(k)] every five days, for about 80 institutes ...
  • metadataBIPM Circular T
    Circular T provides the values of the differences [UTC – UTC(k)] every five days, for about 80 institutes ...
  • meetingAlvio@80: Conference in honor of Alvio Renzini（受疫情影响时间待定） |
    | ...
  • article-nadc科研人员利用LAMOST数据对恒星活动性与年龄关系的研究
    该研究结果已在国际知名天文期刊《天体物理学报》（2019, ApJ, 887, 84）上发表。
  • article-nadc科研人员利用LAMOST数据对恒星活动性与年龄关系的研究
    该研究结果已在国际知名天文期刊《天体物理学报》（2019, ApJ, 887, 84）上发表。
  • article-psp成果展示
    唐磊明.星辰大海——记我的第一颗新星发现[J].天文爱好者,2022(5):80-83.
    2017ATel10596....1B/abstract ATel#10707，Spectrocopic classification of SN 2017glx (PSP17B) as a young 91T-like ...
    2020ATel13384....1W/abstract ATel#13566，LJT Spectroscopic Classification of AT2020enm as a Young 99aa-like ...
  • article-nadcLAMOST DR6数据集正式发布
    DR6共包括4902个观测天区（天区覆盖图如图1），发布1125万条光谱，低分辨率光谱总数991万，中分辨率非时域光谱数据50万，中分辨率时域数据84万。
  • metadataThe First LHAASO Catalog of Gamma-Ray Sources
    represents the most sensitive E > 1 TeV gamma-ray survey of the sky covering declination from −20◦ to 80 ...
    In total, the catalog contains 90 sources with extended size smaller than 2◦ and with significance of ...
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