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脉冲星转动不稳定性的观测与研究。
近期,北京大学博士研究生张萌、张华伟研究员、德国马普天文研究所向茂盛博士等使用红巨星样本的LAMOST光谱数据筛选出富含ɑ元素的“年轻”恒星,并对这些恒星的形成机制进行了深入分析和研究,结果表明这些富ɑ元素的“年轻”恒星可能起源于双星演化,这使得人们对此类特殊恒星的形成有了更进一步的认识。该成果发表在国际知名天文学术期刊《天体物理学报》(2021,ApJ,922,145)。
东濮凹陷石炭-二叠系煤系烃源岩的生烃演化时空差异性尚存在争议,烃源岩热演化生烃史的定量化研究仍有待进一步深入.利用热模拟实验和盆地模拟技术对烃源岩热演化生烃史进行了系统定量评价.煤系暗色泥岩、煤和碳质泥岩具有相似的生气模式,以Ro为0.5%、1.2%、2.2%、3.15%作为界限,将煤系烃源岩生气作用统一划分为5个阶段,其中主生气期门限Ro为2.2%,对应深度约为5500 m;东濮凹陷石炭-二叠系...
I have conducted an extensive study of the Gem OB1 molecular cloud complex in order to determine the global morphology of the molecular gas and how the morphology is correlated with the distribution o...
We conducted an extensive multi-wavelength study of the nearest giant molecular cloud, L1641, with the goal of characterizing its stellar populations. At a distance of approximately 500 pc, L1641 prov...
This thesis seeks to explain the nature of line emission observed in young stellar objects, and to use the lines as diagnostics of the accretion process that is central to star formation. We maintain ...
基于星云的流体力学和磁流体动力学,用非线性方程的定性分析理论讨论了双星的形成。非线性相互作用和旋转取到非常关键的作用。此外,Lorenz模型可以由流体力学方程导出,模型中的双翼正好形成双星。而线性方程仅仅形成单星。
We present a new method to use 24 micron observations to estimate the total infrared luminosity, LIR, and the star formation rate of star-forming galaxies across the redshift range 0 < z < 3. This is ...
We study a multi-field inflationary theory with separable Lagrangian, which has different speed of sound for each field. We find that the fields always coupled at perturbative level through gravitatio...
The energy spectrum of cosmic-ray antiprotons has been measured in the range 0.17 to 3.5 GeV, based on 7886 antiprotons collected by the BESS-Polar II instrument during a long-duration flight over Ant...
Mapping the X-Shaped Milky Way Bulge     Mapping  X-Shaped Milky  Bulge       2011/10/17
We analyzed the distribution of the RC stars throughout Galactic bulge using 2MASS data. We mapped the position of the red clump in 1 sq.deg. size fields within the area |l|<=8.5deg and $3.5deg<=|b|<=...
We analyze the HCO+ 3-2 and H13CO+ 3-2 line profiles of 27 high-mass star-forming regions to identify asymmetries that are suggestive of mass inflow. Three quantitative measures of line asymmetry are ...
NGC7538 is a complex massive star-forming region. The region is composed of several radio continuum sources, one of which is IRS1, a high-mass protostar, from which a 0.3 pc molecular bipolar outflow ...
Using galaxy group/cluster catalogs created from the Sloan Digital Sky Survey Data Release 7, we examine in detail the specific star formation rate (SSFR) distribution of satellite galaxies and its de...
We investigate the quantitative constraint on the triple-alpha reaction rate based on stellar evolution theory, motivated by the recent significant revision of the rate proposed by nuclear physics cal...

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