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arXiv 0802.0350astro-ph
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PSR J0737-3039:X射线中的相互作用脉冲星

PSR J0737-3039: Interacting Pulsars in X-Rays

A. Pellizzoni, A. Tiengo, A. De Luca, P. Esposito, S. Mereghetti

摘要:

本文介绍了2006年10月XMM-Newton卫星对相对论双脉冲星系统PSR J 0737 -3039进行的~230 ks长X射线观测结果。我们确认在X射线中检测到PSR J 0737 - 3039 A(PSR A)的脉冲发射,主要归因于软非热幂律分量(光子指数约3.3),0.2-3 keV光度约1.9E+30 erg/s(假设距离为500 pc)。第一次,PSR J 0737 - 3039 B(PSR B)的脉冲X射线发射也在轨道的一部分被探测到。这种辐射与温度kT=30 eV的热辐射和~ 1 E +32 erg/s的热光度一致,可能是由PSR A的风引起的PSR B表面加热提供动力。数据还需要一个较热(~130 eV)和较暗(~5E+29 erg/s)的热分量,可能源于返回粒子加热PSR A或PSR B的极冠。在PSR A的风和星际介质或PSR B的磁层之间的弓形激波没有X射线发射的迹象。这种激波分量的亮度上限(~ 1 E +29 erg/s)将PSR A的风磁化参数σ限制在大于1的值。

英文摘要:

We present the results of a ~230 ks long X-ray observation of the relativistic double-pulsar system PSR J0737-3039 obtained with the XMM-Newton satellite in 2006 October. We confirm the detection in X-rays of pulsed emission from PSR J0737-3039A (PSR A), mostly ascribed to a soft non-thermal power-law component (photon index ~ 3.3) with a 0.2-3 keV luminosity of ~1.9E+30 erg/s (assuming a distance of 500 pc). For the first time, pulsed X-ray emission from PSR J0737-3039B (PSR B) is also detected in part of the orbit. This emission, consistent with thermal radiation with temperature kT=30 eV and a bolometric luminosity of ~1E+32 erg/s, is likely powered by heating of PSR B's surface caused by PSR A's wind. A hotter (~130 eV) and fainter (~5E+29 erg/s) thermal component, probably originating from back-falling particles heating polar caps of either PSR A or PSR B is also required by the data. No signs of X-ray emission from a bow-shock between PSR A's wind and the interstellar medium or PSR B's magnetosphere are present. The upper limit on the luminosity of such a shock component (~1E+29 erg/s) constrains the wind magnetization parameter sigma of PSR A to values greater than 1.

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