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arXiv 0706.3182astro-ph
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两颗类船帆脉冲星的通量密度和射电偏振特性

Flux Densities and Radio Polarization Characteristics of Two Vela-like Pulsars

F. Crawford, C. L. Tiffany

摘要:

我们报告的双频射电偏振观测两个年轻的,充满活力的恒星,PSR J 0940 -5428和J1301-6305。这是在帕克斯多波束巡天中发现的第一批类船帆星。我们进行了观察,这些恒星与澳大利亚望远镜紧凑阵列(ATCA)在中心频率为1384和2496 MHz的脉冲星选通,同时保留完整的斯托克斯参数。在校正带宽去极化后,我们测量了这些类星体的偏振特性、通量密度和旋转测量。来自ATCA数据的光谱指数是浅的,但仍然与这种类型的恒星所看到的值一致。这两颗双星的自转测量结果与最近使用帕克斯望远镜的数据报道的结果一致,并且这两颗双星在1384和2496 MHz都具有高度线性偏振的脉冲轮廓。我们的研究结果支持了先前指出的高程度的线性偏振,浅光谱指数,大自旋下降光度之间的相关性。

英文摘要:

We report on dual-frequency radio polarimetry observations of two young, energetic pulsars, PSRs J0940-5428 and J1301-6305. These were among the first Vela-like pulsars discovered in the Parkes Multibeam survey. We conducted observations of these pulsars with the Australia Telescope Compact Array (ATCA) at center frequencies of 1384 and 2496 MHz using pulsar gating while preserving full Stokes parameters. After correcting for bandwidth depolarization, we have measured polarization characteristics, flux densities, and rotation measures for these pulsars. The spectral indices derived from the ATCA data are shallow but still consistent with values seen for pulsars of this type. The rotation measures for both pulsars are consistent with those reported recently using data from the Parkes telescope, and both pulsars have highly linearly polarized pulse profiles at both 1384 and 2496 MHz. Our results support a previously noted correlation between high degree of linear polarization, shallow spectral index, and large spin-down luminosity.

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