旋涡星系旋臂的准确图样

THE ACCURATE PATTERN OF GALACTIC SPIRAL ARMS

根据已导出的旋涡星系扰动引力势的一般形式解,考虑在无限薄盘(α→∞)的情况下,作旋臂图样曲线.适当地调节参量Ω_P 和 B(m,n),计算得到的理论曲线与实际观测到的旋臂符合较好.克服了由林家翘理论作出的旋臂图样与实际旋臂有时相差甚远的问题,并利用星系 M_(51)的旋臂作了这2个理论的比较.

According to the formula in an artiole by the some authors which gives a general solution of disturbed gravitational potential with spiral galaxy in three-dimensions,and considering the case of infinite thin disk (α→∞).The patterns of spiral asms are made.Adjusting the para- meters Ω_p and B(m,n) appropriately,the theoretical curves calculated coincide with the observational spiral arms,and the Larger differences between them appearing sometimes in C.C.Lin's theory are overcome. Using the spiral arms of galaxy M_(51) as a sample,these theoies are compa- red and a satisfactory conclusion is given.