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arXiv 1608.09007astro-ph.HE
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PALFA巡天发现的29颗脉冲星的时间

Timing of 29 Pulsars Discovered in the PALFA Survey

A. G. Lyne, B. W. Stappers, S. Bogdanov, R. Ferdman, P. C. C. Freire, V. M. Kaspi, B. Knispel, R. Lynch, B. Allen, A. Brazier, F. Camilo, F. Cardoso, S. Chatter… 展开作者

A. G. Lyne, B. W. Stappers, S. Bogdanov, R. Ferdman, P. C. C. Freire, V. M. Kaspi, B. Knispel, R. Lynch, B. Allen, A. Brazier, F. Camilo, F. Cardoso, S. Chatterjee, J. M. Cordes, F. Crawford, J. S. Deneva, J. W. T. Hessels, F. A. Jenet, P. Lazarus, J. van Leeuwen, D. R. Lorimer, E. Madsen, J. McKee, M. A. McLaughlin, E. Parent, C. Patel, S. M. Ransom, P. Scholz, A. Seymour, X. Siemens, L. G. Spitler, I. H. Stairs, K. Stovall, J. Swiggum, R. S. Wharton, W. W. Zhu

摘要:

我们报告的发现和定时观测的29个遥远的长周期脉冲星发现在正在进行的阿雷西博PALFA脉冲星调查。随着阿雷西博望远镜的发现,Jodrell Bank天文台对这些恒星的确认和定时观测已经产生了高精度的位置和旋转和辐射特性的测量。我们已经使用多频数据来测量这些恒星的星际散射特性。大多数脉冲星都具有与以前已知的脉冲星群相同的特性,尽管有四个脉冲星显示出一些显着的特征。PSR J1907+0631和J1925+1720是年轻的,与超新星遗迹或plerionic星云有关:J1907+0631位于SNR G40.5-0.5的中心附近,而J1925+1720与高能费米伽马射线源重合。其中一颗脉冲星J1932+1500,在一个令人惊讶的偏心,199天的双星轨道上,伴星的最小质量为0.33太阳质量。其中几个信号源存在时序噪声,两个信号源(PSR J 0611 +1436和J1907+0631)都存在较大的毛刺,但毛刺后旋转特性非常不同。特别是,PSR J 0611 +1436的旋转周期在大约12年内不会恢复到其故障前的值,这比任何其他大故障后的恢复时间尺度要长得多。

英文摘要:

We report on the discovery and timing observations of 29 distant long-period pulsars discovered in the ongoing Arecibo PALFA pulsar survey. Following discovery with the Arecibo Telescope, confirmation and timing observations of these pulsars over several years at Jodrell Bank Observatory have yielded high-precision positions and measurements of rotation and radiation properties. We have used multi-frequency data to measure the interstellar scattering properties of some of these pulsars. Most of the pulsars have properties that mirror those of the previously known pulsar population, although four show some notable characteristics. PSRs J1907+0631 and J1925+1720 are young and are associated with supernova remnants or plerionic nebulae: J1907+0631 lies close to the center of SNR G40.5-0.5, while J1925+1720 is coincident with a high-energy Fermi gamma-ray source. One pulsar, J1932+1500, is in a surprisingly eccentric, 199-day binary orbit with a companion having a minimum mass of 0.33 solar masses. Several of the sources exhibit timing noise, and two, PSRs J0611+1436 and J1907+0631, have both suffered large glitches, but with very different post-glitch rotation properties. In particular, the rotational period of PSR J0611+1436 will not recover to its pre-glitch value for about 12 years, a far greater recovery timescale than seen following any other large glitches.

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