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arXiv 1607.01737astro-ph.HEastro-ph.SR
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脉冲星B1859 +07和B0919 +06异常发射事件的准周期性

Quasi-Periodicities in the Anomalous Emission Events in Pulsars B1859+07 and B0919+06

Haley M. Wahl, Daniel J. Orfeo, Joanna M. Rankin, Joel M. Weisberg

摘要:

在脉冲星B1859+07和可能的B 0919 +06的奇异发射位移中发现了准周期性。这些事件最初是由Rankin,Rodriguez & Wright在2006年研究的,最初看起来是无序或随机的,但进一步的映射和傅立叶分析显示,它们在B1859+07中大约有150个旋转周期,在B 0919 +06中可能有700个旋转周期。我们现在称之为“旋风”的事件不是任何已知类型的模式改变的结果,而是我们发现它们是一种独特的不同效应,由某种机制产生,而不是任何已知的脉冲调制现象。鉴于我们还没有找到另一种解释的旋风,我们呼吁在天体物理学的周期性的最后手段:轨道动力学在一个双系统。这样的“伴星”的半长轴将与两颗双星的光圆柱半径相当。然而,为了抵抗潮汐的破坏,它们的密度必须至少是10 $^5$克/厘米$^3$ --因此,白矮星核心或密度更大的东西可能被指示出来。

英文摘要:

A quasi-periodicity has been identified in the strange emission shifts in pulsar B1859+07 and possibly B0919+06. These events, first investigated by Rankin, Rodriguez & Wright in 2006, originally appeared disordered or random, but further mapping as well as Fourier analysis has revealed that they occur on a fairly regular basis of approximately 150 rotation periods in B1859+07 and perhaps some 700 in B0919+06. The events-which we now refer to as "swooshes"-are not the result of any known type of mode-changing, but rather we find that they are a uniquely different effect, produced by some mechanism other than any known pulse-modulation phenomenon. Given that we have yet to find another explanation for the swooshes, we have appealed to a last resort for periodicities in astrophysics: orbital dynamics in a binary system. Such putative "companions" would then have semi-major axes comparable to the light cylinder radius for both pulsars. However, in order to resist tidal disruption their densities must be at least some 10$^5$ grams/cm$^3$-therefore white-dwarf cores or something even denser might be indicated.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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