典型文献
The"Bi-drifting"Subpulses of PSR J0815+0939 Observed with the Five-hundred-meter Aperture Spherical Radio Telescope
文献摘要：
We report the"Bi-drifting"subpulses observed in PSR J0815+0939 using the Five-hundred-meter Aperture Spherical radio Telescope(FAST).The observation at band from 1050 to 1450 MHz is evenly divided into two bands,i.e.,the bands at center frequencies of 1150 and 1350 MHz.The mean pulse profiles and the"Bi-drifting"subpulses at these two bands are investigated.It is found that the pulse profiles at these two frequencies show four emission components,and the peak separations between four emission components decrease with the increase of frequency.In addition,the ratio of peak intensity of each component to the intensity of component Ⅳ at 1150 MHz is larger than that at 1350 MHz.We carry out an analysis of the longitude-resolved fluctuation spectrum and two-dimensional fluctuation spectrum for each emission component,and find that the P3 of components Ⅰ,Ⅱ and Ⅲ is about 10.56,10.57 and 10.59 s at 1150 and 1350 MHz.However,the reliable measurements of P3 of component Ⅳ and P2 for these four components were not obtained due to the low signal-to-noise ratio of observation data.The pulse energy distributions at frequencies 1150 and 1350 MHz are presented,and it is found that no nulling phenomenon has been found in this pulsar.With our observation from the FAST,the"Bi-drifting"subpulse phenomenon of PSR J0815+0939 is expanded from 400 to 1350 MHz,which is helpful for the relevant researchers to test and constrain the pulsar emission model,especially the model of"Bi-drifting"subpulse.
文献关键词：
中图分类号：
作者姓名：
Lun-Hua Shang;Jun-Tao Bai;Shi-Jun Dang;Qi-Jun Zhi
作者机构：
School of Physics and Electronic Science,Guizhou Normal University,Guiyang 550001,China;School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing,Guizhou Normal University,Guiyang 550001,China
文献出处：
引用格式：
[1]Lun-Hua Shang;Jun-Tao Bai;Shi-Jun Dang;Qi-Jun Zhi-.The"Bi-drifting"Subpulses of PSR J0815+0939 Observed with the Five-hundred-meter Aperture Spherical Radio Telescope)[J].天文和天体物理学研究,2022(02):195-203
A类：
Subpulses,J0815+0939,subpulses,nulling,subpulse
B类：
Bi,drifting,PSR,Observed,Five,hundred,meter,Aperture,Spherical,Radio,Telescope,We,report,observed,using,radio,FAST,observation,from,MHz,evenly,divided,into,two,bands,center,frequencies,mean,profiles,these,are,investigated,It,found,that,show,four,emission,components,peak,separations,between,decrease,increase,frequency,In,addition,intensity,each,larger,than,carry,analysis,longitude,resolved,fluctuation,spectrum,dimensional,find,P3,about,However,reliable,measurements,P2,were,not,obtained,due,low,signal,noise,data,energy,distributions,presented,phenomenon,has,been,this,pulsar,With,expanded,which,helpful,relevant,researchers,test,constrain,model,especially
AB值：
0.402589
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