High-resolution optical spectra of the zero age star HD77407 are analysed and its Li, C, O, Na, Mg, Al, Si, K, Ca, Sc, Ti, V, Co, Ni and Ba contents are determi
We make a statistical study of the energy sources of high-velocity phenomena, Herbig-Haro(HH) objects. IRAS counterparts of HH objects are identified. Their col
Two dimensional distributions of T90 versus Epeak(or Ebreak)for three bright GRB samples have been investigated.The result shows that although both T90 and Epea
To investigate the physical properties of HII regions and some PNe about 4 in size, a DEFPOS Fabry-Perot spectrometer has been redesigned and set up at the coud