Mira变星的绝热膨胀过程的质量损失率和声点半径

一、引言恒星质量损失率的讨论和研究,在近十年中引起了较大的注意,因为这对恒星演化过程以及星际物质的化学组成的研究有重要价值。很多观测事实说明,在许多Mira变星的拱星包层中存在着OH脉泽。而且通过红外天文的观测获得了有关拱星包层速度、密度、     

Discovery of the 26 OH Megamaser Spots in the Circumnuclear Torus of IRAS10173＋0828 with MERLIN Observations

We present the discovery of 26 OH megamaser spots in circumnuclear torus of galaxy IRAS10173 0828 with MERLIN observations. The physical parameters of the 26 OH megamaser spots are obtained.     

Thin Circular Disc Shells of Radio Sources Around Supernova Remnant G16.2—2.7

We propose a new model of distinct thin circular disc shells to analyse the radio map of the supernova remnant (SNR) G16.2-2.7from NRAO VLA Sky survey at 1.4GHz and the radio sources around it ,It is obtained that the 20 radio sources around the SNR G16.2-2.7 distribute onn the four thin circular disc shells.The results support the shell-like structure strongly and further indicate that the shell-like structure is several thin circular disc shells.Because the shell-like structure dominates the total sample,our result is important for research of the radio morphology of SNRs.     

关于气相反应形成星际氢分子机理的研究

本文用Heitler-London方法计算了H—H~-相互作用能,结果表明气相反应H H~-→H_2 e是星际氢分子形成的一种可行的机制。并用半经典方法推算出的反应速度常数与实验结果很接近。我们运用这种机制计算了HⅡ区过渡带氢分子柱密度,与一些星的观测事实很符合,表明在HⅡ区过渡带中氢分子是通过气相反应形成的。