本文对灾害天气出现前的准备工作要点和出现时的观测、发报等地面测报工作要点进行了归纳总结,帮助观测员更好地掌握在特殊情况下地面气象测报的工作流程及工作要点,最大限度地确保自动站仪器正常运行,提高地面气象观测质量.
本文介绍了一种连接太阳系行星历表参考架与ICRF的方法.基于毫秒脉冲星的计时观测与VLBI观测,初步估计了行星历表参考架与ICRF的连接参数,这是目前唯一的直接连接行星历表参考架与ICRF的方法.所得连接参数与之前间接连接的结果一致.
We explore the variability of quasars in the MgⅡ and Hbeta broad emission lines and UV/optical continuum emission using the Sloan Digital Sky Survey Reverberation Mapping project (SDSS-RM).This is the
We have analysed the Fermi/LAT observation data of five narrow-line Seyfert 1(NLS1) Galaxies in the GeV band,and find that they have significant variations.Fermi/LAT observations also show that flat s
Based on stellar population models without (SSP) and with (BSP) binary interactions,we investigate the effects of binary interactions on parameter determinations for early-type galaxies (ETGs).We pres
伽玛暴(GRB)是宇宙中最剧烈的爆发现象,爆发能量高达10^53erg.红移(z)能达到9左右.因此能作为研究高红移宇宙的探针,对宇宙学模型也能有很好的限制.有很多经验关系可以把伽玛暴标准烛光化.常用的一个是Amati关系(Eiso-Ep),我们更新了样本之后用Amati关系重新对宇宙学模型进行了限制,发现当把Amati关系和宇宙学参数同时进行限制时,对宇宙学参数的限制很差.然后我们通过SNe I
Using the Data Release 9 Quasar (DR9Q) spectra from the Baryonic Oscillation Spectroscopic Survey,which does not include the quasar spectra contained in the Sloan Digital Sky Survey Data Release 7 (SD
The accretion of dark matter subhaloes within cosmic web:primordial anisotropic distribution and its universality.The distribution of galaxies displays anisotropy on different scales and it is often r
I will introduce our works on probing high-z emission-line galaxies (ELGs) through deep narrow-band surveys.We obtained our deep Near-infrared and optical narrow-band imaging data through CFHT/WIRCam
More than 90 quasars have been published above redshift 5.6.About 30 ％of the optically luminous z～6 quasars selected from the SDSS main survey are detected in bright millimeter dust continuum at sub-m