THE EINSTEIN@HOME SEARCH FOR RADIO PULSARS AND PSR J2007+2722 DISCOVERY

THE EINSTEIN@HOME SEARCH FOR RADIO PULSARS AND PSR J2007+2722 DISCOVERY
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EINSTEIN@HOME 搜索 PULSARS 无线电波和 PSR J2007 2722 发现

DOI:
10.1088/0004-637x/773/2/91
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发表时间:
2013
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
Allen B
Allen B
中科院分区:
--
文献类型:
--
作者:
Allen B

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Einstein@ Home汇集了来自193个国家的数十万志愿者的计算机能力,利用电磁和引力波探测器的数据寻找新的中子星。本文详细介绍了利用阿雷西博天文台脉冲星ALFA巡天数据寻找新射电双星的情况。巨大的计算能力使这种搜索能够覆盖一个新的参数空间区域;它可以检测到轨道周期短至11分钟的双星系统中的双星。我们还描述了第一个Einstein@ Home发现,40.8 Hz孤立脉冲星PSR J2007+ 2722,并提供了一个完整的时间模型。PSR J2007+ 2722的脉冲轮廓非常宽,几乎在整个自旋周期内都有发射。这颗中子星星很可能是一颗被破坏的再循环脉冲星,大约和它典型的4.04亿年的自旋下降年龄一样老。然而,有一个小的机会,它是最近出生的,具有低磁场。如果是这样的话,X射线通量的上限表明,但不能证明PSR J2007+ 2722至少有100 kyr的历史。在未来,我们希望志愿者提供的巨大计算能力能够使更多的射电脉冲星发现成为可能。
Einstein@ Home aggregates the computer power of hundreds of thousands of volunteers from 193 countries, to search for new neutron stars using data from electromagnetic and gravitational-wave detectors. This paper presents a detailed description of the search for new radio pulsars using Pulsar ALFA survey data from the Arecibo Observatory. The enormous computing power allows this search to cover a new region of parameter space; it can detect pulsars in binary systems with orbital periods as short as 11 minutes. We also describe the first Einstein@ Home discovery, the 40.8 Hz isolated pulsar PSR J2007+ 2722, and provide a full timing model. PSR J2007+ 2722's pulse profile is remarkably wide with emission over almost the entire spin period. This neutron star is most likely a disrupted recycled pulsar, about as old as its characteristic spin-down age of 404 Myr. However, there is a small chance that it was born recently, with a low magnetic field. If so, upper limits on the X-ray flux suggest but cannot prove that PSR J2007+ 2722 is at least∼ 100 kyr old. In the future, we expect that the massive computing power provided by volunteers should enable many additional radio pulsar discoveries.
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DOI: --
发表时间: 2008
期刊:
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