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arXiv 0905.1250astro-ph.SR
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RRAT J1819-1458的无线电极化测量

Radio polarization measurements from RRAT J1819-1458

A. Karastergiou, A. W Hotan, W. van Straten, M. A McLaughlin, S. M Ord

摘要:

我们提出了第一个极化测量的无线电发射从RRAT J1819 $-$ 1458。我们的观测与常规计时会议并行进行,产生了少量明亮的偏振脉冲。的偏振特性和集成的配置文件类似于那些正常的单光子晶体与平均自旋下降能量(Edot):中度到低的线性偏振的集成的配置文件,尽管相对较高的极化在个别脉冲。平均而言,还观察到小程度的圆偏振。偏振位置角执行非常平滑、陡峭的S形曲线,被两个正交跳跃中断。基于PA摆动的形状,我们对发射几何形状施加一些约束。我们比较这些偏振特性的其他无线电发射中子星的人口,包括年轻的恒星,恒星与高表面磁场和无线电发射磁星。从极化测量,法拉第旋转的RRAT的措施。

英文摘要:

We present the first polarization measurements of the radio emission from RRAT J1819$-$1458. Our observations, conducted in parallel to regular timing sessions, have yielded a small number of bright and polarized pulses. The polarization characteristics and integrated profile resemble those of normal pulsars with average spin-down energy (Edot): moderate to low linear polarization in the integrated profile despite relatively high polarization in the individual pulses. On average, a small degree of circular polarization is also observed. The polarization position angle executes a remarkably smooth, steep S-shaped curve, interrupted by two orthogonal jumps. Based on the shape of the PA swing, we place some constraints on the emission geometry. We compare these polarization properties to those of other radio emitting neutron star populations, including young pulsars, pulsars with a high surface magnetic field and radio emitting magnetars. From the polarization measurements, the Faraday rotation measure of this RRAT is derived.

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