Statistics
Scientific paper
Nov 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011acasn..52..449c&link_type=abstract
Acta Astronomica Sinica, vol. 52, no. 6, p. 449-459
Statistics
Pulsars: General, Stars: Statistics, X-Rays: Binaries
Scientific paper
The period distribution and surface magnetic field strength distribution of pulsars as well as the spatial distribution of pulsars are analyzed statistically. The spatial distribution of millisecond pulsars is more dispersive than that of normal radio pulsars. And the spatial distribution of low-mass X-ray binary pulsars is also more dispersive than that of high-mass X-ray binary pulsars. The peak values of the rotation period distributions of isolated millisecond pulsars, normal radio pulsars and millisecond pulsars in binaries are 4.7 ms, 0.6 s and 3.5 ms, respectively. The surface magnetic field strengthes of FERMI pulsars (gamma-ray pulsars observed by Large Area Telescope/Fermi Gamma-ray Space Telescope) and normal pulsars all concentrate in 10^{12} Gs. Combined with the model of the formation and evolution of pulsars, we discuss some characteristics of these distributions. The results show that some young pulsars in the high-energy radiation stage are associated with supernova remnants. This is the direct reflection of the theory that pulsars are formed by supernovae. The results also show that the surface magnetic field strengthes of pulsars change a little in the transformation period from the high-energy γ-ray pulsar stage to the normal radio pulsar stage.
Ali Taani
Cai Yifei
Zhang Cheng-Min
Zhao Yong-Heng
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