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arXiv 2004.00164astro-ph.HE
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GBT 350 MHz漂移扫描脉冲星巡天。III。探测PSR J2256-1024遮蔽材料中的磁场

The GBT 350-MHz Drift Scan Pulsar Survey. III. Detection of a magnetic field in the eclipsing material of PSR J2256-1024

Kathryn Crowter, Ingrid H. Stairs, Christie A. McPhee, Anne M. Archibald, Jason Boyles, Jason Hessels, Chen Karako-Argaman, Duncan R. Lorimer, Ryan S. Lynch, Ma… 展开作者

Kathryn Crowter, Ingrid H. Stairs, Christie A. McPhee, Anne M. Archibald, Jason Boyles, Jason Hessels, Chen Karako-Argaman, Duncan R. Lorimer, Ryan S. Lynch, Maura A. McLaughlin, Scott M. Ransom, Mallory S. E. Roberts, Kevin Stovall, Joeri van Leeuwen

摘要:

我们首次测量了黑寡妇脉冲星食物质中的非零磁场。黑寡妇是一种毫秒级的辐射源,它们会烧蚀它们的同伴,因此它们经常被认为是孤立毫秒级辐射源的一个潜在来源。PSR J2256-1024是一个在无线电波段被发现的日食黑寡妇,后来也在光谱的X射线和伽马部分被观察到。在这里,我们提出的无线电定时解决方案PSR J2256-1024,在350,820和1500 MHz的偏振剖面和偏振剖面的变化,由于系统中的食材料的调查。在后者中,我们在日食后不久的线偏振中发现了法拉第旋转的证据,测量到每平方米0.44(6)拉德的旋转测量值和3.5(17)mG的相应视线磁场。

英文摘要:

We present the first measurement of a non-zero magnetic field in the eclipsing material of a black widow pulsar. Black widows are millisecond pulsars which are ablating their companions; therefore they are often proposed as one potential source of isolated millisecond pulsars. PSR J2256-1024 is an eclipsing black widow discovered at radio wavelengths and later also observed in the X-ray and gamma parts of the spectrum. Here we present the radio timing solution for PSR J2256-1024, polarization profiles at 350, 820, and 1500~MHz and an investigation of changes in the polarization profile due to eclipsing material in the system. In the latter we find evidence of Faraday rotation in the linear polarization shortly after eclipse, measuring a rotation measure of 0.44(6) rad per meter squared and a corresponding line-of-sight magnetic field of 3.5(17) mG.

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