Study On Simulation Method Of X-ray Binary Signals With Dynamical Characteristics

X-ray binary is an important object in the study of astronomy and astrophysics,it occupies the majority in the number of the pulsars have been discovered.Compared with pulsars,X-ray binaries have many advantages,such as a larger number of candidates,wider distribution in space and higher flux.X-ray binary is a suitable kind of navigation source in space,but the binary orbital motion adding the difficulty to study and less reports about X-ray binary used in simulation and navigation.For the need of X-ray binary simulation on ground,this thesis summarized the research progress of binary pulse at home and abroad,investigated the establishment of the X-ray binary coordinate system,the delay correction of the binary system,and the photons signal simulation.The main research work includes:1.For the time delay problem caused by the pulsar motion in the binary system,we analyzed the binary orbit model,studied the conversion relation among the binary-barycentric celestial coordinate system?BBCRS?,binary orbital-motion plane-coordinate system and the barycentric celestial reference system?BCRS?,elaborated the mathematical model of the binary system delay,interstellar delay,and solar system delay.2.For the problem that the photons'actual propagation path unknown in advance,when correcting the X-ray photon arrival time from the Solar System Barycenter?SSB?to the spacecraft and from the Binary Barycenter?BB?to the pulsar,a iterative calculation method of the photon time of arrival?TOA?is proposed.Firstly we used the photon TOA at SSB and at BB,calculated the position of the spacecraft and pulsar with error,the geometric delay of the solar and binary system,and then obtained the photon TOA at the spacecraft and pulsar with error,the corresponding geometric delay,finally iterated to obtain the accurate photon TOA.3.Finally,for the difficult to verify the correctness of the photon signal caused by the absence of a pulsar standard pulse profile at SSB of the X-ray binary system,we proposed a method using the Doppler Effect in the place of spacecraft and SSB.We used the Doppler Effect to solve the pulsar rotation frequency with orbital motion at the SSB and the spacecraft,and compared the theoretical value with the result of the frequency search;Another method was to recover the profile at pulsar with corrected photon TOA,or to directly subtract the original photon TOA.The simulation result showed that the theoretical frequency is consistent with the search frequency,the Mean Squared Error?MSN?are respectively3.4221×10^-10and 4.4536×10^-10,the Bhattacharyya Coefficient?BC?and Pearson Correlation Coefficient?PCC?between profile obtained by folding and original are8.1891×10^-4and0.99999819,and the difference within the error range.