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Non-Thermal X-ray Properties of Rotation Powered Pulsars and Their Wind Nebulae | | Xiang-Hua Li
; Fang-Jun Lu
; Zhuo Li
; | | Date: |
29 Jul 2007 | | Abstract: | We present a statistical study of the non-thermal X-ray emission of 29 young
rotation powered pulsars (RPPs) and 22 pulsar wind nebulae (PWNe) by using {sl
Chandra} and {sl XMM-Newton} observations, which with the high spatial
resolutions enable us to spatially resolve pulsars from their surrounding PWNe.
We obtain the X-ray luminosities and spectra separately for RPPs and PWNe, and
then we investigate their distribution and relation to each other and also
relations with other rotational parameters. In the pair-correlation analysis we
find that: (1) the nonthermal pulsar X-ray luminosity $L_{
m x,psr}$ is
strongly correlated with the pulsar period $P$, period derivative $dot{P}$,
characteristic age $ au$, and spin-down power $dot{E}$, $L_{
m
x,psr}=10^{-3.7}dot{E}^{1.0pm0.1}$; (2) the pulsar photon spectral index
$Gamma_{
m psr}$ is negatively correlated with $dot{P}$ and $dot{E}$ but
positively correlated with $ au$; (3) the PWN X-ray luminosity $L_{
m x,pwn}$
shows weak correlation with $dot{P}$ and strong correlation with $ au$ and
$dot{E}$, $L_{
m x,pwn}=10^{-19.0}dot{E}^{1.4pm0.2}$; (4) the PWN photon
spectral index $Gamma_{
m pwn}$ is positively correlated with $L_{
m x,pwn}$
and $L_{
m x,pwn}/dot{E}$. The statistic study of PWN spectral properties
supports the particle wind model in which the X-ray emitting electrons are
accelerated by the termination shock of the wind. | | Source: | arXiv, 0707.4279 | | Services: | Forum | Review | PDF | Favorites | |
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