ASCA observations of the two Type II AGNs, NGC 7314 and NGC 7582,show clear variations in the broad X-ray band (0.4-10keV) on short timescales ~ 104s. Spectral a
<正>The discovery of silicate carbon star poses a challenge to the theory of stellar evolution in the late stage, hence it is important to look for more silicat
We present a model which explains the observed multi-linear spatial structures with different velocity gradients of the 50-61A+ methanol line at 6.7 GHz.We cons