Dependences of the X-ray luminosity and pulsar wind nebula on different parameters of pulsars and the evolutionary effects

Astronomy and Astrophysics – Astrophysics

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revised version

Scientific paper

10.1142/S0218271804004505

Dependences of the X-ray luminosity (L$_x$) of single pulsars, due to ejection of relativistic particles, on electric field intensity, rate of rotational energy loss (\.{E}), magnetic field, period, and the energy spectra of the ejected particles are discussed. Influence of the magnetic field and effects of some other parameters of neutron stars on the L$_x$-\.{E} and the L$_x$-$\tau$ (characteristic time) dependences are considered. Evolutionary factors also play an important role in our considerations. We find that only the pulsars with L$_{2-10keV}$$>10^{33}$ erg/s have pulsar wind nebula around them. The pulsars from which $\gamma$-ray radiation has been observed have low X-ray luminosities in general.

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