PSR J1701-3726脉冲消零现象研究

A Study of Pulse Nulling in PSR J1701-3726

利用Parkes 64 m射电望远镜在中心频率为1369 MHz的观测数据,分析了PSR J1701-3726的脉冲消零现象,发现这颗星的脉冲消零现象存在准周期性,准周期值约为81.25P,其中P为PSR J1701-3726的自旋周期,并计算出脉冲消零比(Nulling Fraction,NF)为27%±0.97%.进一步研究单脉冲在脉冲辐射窗口区域的相对能量随时间的变化关系,发现在消零态和爆发态之间存在a、b、c、d共4种不同的切换模式,其中,a模式出现23次,b模式出现6次,c模式出现5次,d模式出现79次,表明状态转换可能存在一定的随机性.

Using the observation data of Parkes 64 m radio telescope at a central frequency of 1369 MHz,the pulse nulling phenomenon of PSR J1701-3726 was analyzed.It is found that the pulse nulling phenomenon of this pulsar has quasi-periodic,and the quasi-period value approximately is 81.25P,where P is the rotation period,and the pulse nulling ratio NF(Nulling Fraction)is calculated to be 27%±0.97%.Further study on the change of relative energy in the on-pulse region over time shows that there are four different switching modes a,b,c and d between null state and burst state,among which mode a occurs 23 times,mode b occurs 6 times,mode c occurs 5 times,and mode d occurs 79 times,indicating that there may be some randomness in state transitions.