【摘要】 本文主要论述用25米射电望远镜和自相关频谱仪于1986年4月13—17日（UT）期间在我国陕西眉县首次对哈雷彗星羟基分子1667 MHz射电话线的观测及归算结果。由谱线轮廓的幅度、宽度、形状和面积相继导出的谱线强度为-2.4Jy,膨胀速度为0.92kms^-1,速度的一级矩为0.20kms^-1,以及羟基的母分子产生率为1.7×10²⁹mols^-1。文中所给出的宇宙羟基源W3和W12的观测结果,分别用来检验设备系统探测射电谱线的功能及对哈雷彗星的羟基谱线进行强度定标。这些结果均同理论预期或以往的有关观测相符合。更多还原

【Abstract】 From 1986 March 31 to April 4 and from April 13 to 17, the 1667 MHz OH line of comet Halley was observed in Shannxi province of China with the 25 m radio telescope of Shanghai Observatory and a 128-channel autocorrelation spectrometer of Peking University. The band-width of spectrometer was 625 KHz and the resolution was 4.92 KHz (0.89 km s-1). The receiver was frequency-switched with a frequency shift of 197 KHz. In order to improve the signal-to-noise ratio we accumulated the 1667 MHz -profiles of April 13 to 17, According to the synthetic profile, we can summarize the results as follows:1) The intensity of the absorbed OH flux was calibrated by means of measurements bf the 1667 MHz OH line of W12. The observed mean OH flux of 4 days is -2.4 Jy.2) The measured OH expansion velocity FOB =0.92 Km s-1, when the helio-centric distance rh = 1.39 AU.3) The profile asymmetry may be characterized by the first order moment σv = 0.20 Kms-1.4) The mean OH parent production rate Qp = 1.7 *1029 mol.s-1, assuming Hasser’s model with the parameters defined in Despois et al.更多还原