Be/X射线双星X0726-260(4U 0728-25)的轨道周期性研究  

Orbital Periods of the Be Star X-ray Transient X0726-260(4U0728-25)

作　　者：唐延柯 盖宁 李怀珍 董富通 TANG Yan-ke;GAI Ning;LI Huai-zhen;DONG Fu-long(School of Physics and Electronic information,Dezhou University,Dezhou Shandong 253023;School of Physics and Electronic Engineehing,Yuxi Normal University,Yuxi Ynnnan 653100,China)

机构地区：[1]德州学院物理与电子信息学院,山东德州253023 [2]玉溪师范学院物理与电子工程学院,云南玉溪653100

出　　处：《德州学院学报》2023年第2期1-4,共4页Journal of Dezhou University

基　　金：国家自然科学基金项目:基于LAMOST对kepler天区红团簇星的内部结构与演化状态的星震学研究(U1931106);山东省自然科学基金项目:LAMOST-kepler天区恒星参量的星震学研究(ZR2019YQ03);山东省青创科技计划项目:基于LAMOST观测的恒星物理特性的星震学研究(2019KJJ006)。

摘　　要：利用RossiX射线计时探测器(RXTE)近十多年的全天空监视器连续观测数据对Be星瞬态X射线源X0726-260(4U0728-25)进行恒星轨道周期分析。利用功率谱强度估计方法分析了大约13年的数据,我们发现Be星X射线源X0726-260的半轨道周期为34.57±0.12天。然后,我们将X射线观测数据时间划分为三个相等的时间间隔,计算发现三个不同的时间段的半轨道周期分别为34.68±0.1天、34.55±0.1天和34.47±0.1天。研究结果表明轨道周期随着时间的推移而减小。通过周期递减可以推导证明这颗X射线双星应该具有一个吸积盘,可以从它的伴星Be星获得物质,从而改变这个系统周期。We use the Rossi X-ray Timing Explorer(RXTE)All Sky Monitor observations of the transient Be star X-ray source X0726-260 from 1996 to 2008 to analyze the star orbital periods.Using the power spectrum intensity estimating method to analyze about thirteen years data,we find that the semi orbital period of Be star X-ray X0726260 is 34.57±0.12 days.Then,we broken down the X-ray time into three equal intervals and find that three different periods.34.68±0.1 days,34.55±0.1 days.34.47±0.1 days separately.It indicates that the orbital period decreases with the time,although the source has a little change in the orbital period.In addition,this can provide the circumstantial evidence to prove that this X-ray star has a accretion disk which can obtain the material from its companion the Be Star,thereby chan ging this system period.

关 键 词：BE星 中子星 X射线 

分 类 号：P153[天文地球—天文学]