脉冲星PSR B0329+54的累积脉冲轮廓分析及其频谱特性的研究

Integrated Pulse Profile Analysis and Study of the Spectral Characters of PSR B0329+54

利用高斯拟合成份分离方法(GFSAP)对脉冲星PSR B0329+54在408 MHz、610 MHz、925 MHz、1408MHz、1642 MHz5个不同频率下的累积脉冲轮廓进行了高斯拟合研究.分析表明该脉冲星的累积脉冲轮廓是由9个高斯成份组成、表明该脉冲星辐射区由一个核成份和4个锥成份构成.这一结果与R.T.Gangadhara和Y.Gupta用窗口阈值技术对该星300及610MHz累积脉冲轮廓分析所得到的结论基本相似.另外、本文对该脉冲星的频谱特性进行分析、得到核成份和4个锥成份的谱指数依次为-2.1、-1.7、-1.3、-1.5和-1.1、该脉冲星辐射区的核成份的频谱比其它4个锥成份的频谱更陡.

The average profiles at frequencies 408MHz, 610MHz, 925MHz, 1408MHz and 1642MHz of PSR B0329＋54 are studied by using the method of Gaussian fit separation （GFSAP）. We find that PSR B0329＋54 has nine components in its profile at all five frequencies. This indicates that the emission region of the pulsar shows one core component and four cone components. The result supports R. T. GANGADHARA and Y. GUPTA＇s model of emission region of the pulsar. The spectra of the core component and cone components are -2.1, -1.7, -1.3, -1.5 and -1.1, respectively. It is found that the spectrum of the core is steeper than that of the other four cones.