A discovery of two slow pulsars with FAST: “Ronin” from the globular cluster M15

被引：0

作者：

Dengke Zhou ^{[1
]}

Pei Wang ^{[2
,3
]}

Di Li ^{[2
,4
,5
]}

Jianhua Fang ^{[1
]}

Chenchen Miao ^{[1
]}

Paulo C.C.Freire ^{[6
]}

Lei Zhang ^{[2
,7
]}

Dandan Zhang ^{[8
,9
]}

Huaxi Chen ^{[1
]}

Yi Feng ^{[1
]}

Yifan Xiao ^{[10
]}

Jintao Xie ^{[1
]}

Xu Zhang ^{[1
]}

Chenwu Jin ^{[1
]}

Han Wang ^{[1
]}

Yinan Ke ^{[1
]}

Xuerong Guo ^{[1
]}

Rushuang Zhao ^{[11
]}

Chenhui Niu ^{[12
]}

Weiwei Zhu ^{[2
,3
]}

Mengyao Xue ^{[2
]}

Yabiao Wang ^{[13
]}

Jiafu Wu ^{[13
]}

Zhenye Gan ^{[13
]}

Zhongyi Sun ^{[13
]}

Chengjie Wang ^{[13
]}

Jie Zhang ^{[10
]}

Junshuo Zhang ^{[2
,4
]}

Jinhuang Cao ^{[2
,4
]}

Wanjin Lu ^{[2
,4
]}

机构：

[1] School of Physics and Electronic Engineering, Qilu Normal University

[2] School of Physics and Electronic Science, Guizhou Normal University

[3] College of Physical Science and Technology, Central China Normal University

[4] Tencent Youtu Lab

[5] Research Center for Astronomical Computing,Zhejiang Laboratory

[6] National Astronomical Observatories, Chinese Academy of Sciences

[7] Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University

[8] University of Chinese Academy of Sciences

[9] New Cornerstone Science Laboratory

[10] Max Planck Institut f ¨ur Radioastronomie

[11] Centre for Astrophysics and Supercomputing, Swinburne University of Technology

[12] School of Mathematical Sciences, School of Physics and Electronic Sciences, Guizhou Normal University

[13] Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing

来源：

Science China(Physics,Mechanics & Astronomy) | 2024年 / Mechanics & Astronomy) . 2024查看该刊数据库收录来源卷 / 06期

基金：

中国国家自然科学基金;

关键词：

D O I：

暂无

中图分类号：

P145.6 [脉冲星（中子星）]; P111.44 [射电望远镜（无线电望远镜）];

学科分类号：

摘要：

Globular clusters harbor numerous millisecond pulsars, but long-period pulsars(P 100 ms) are rarely found. In this study, we employed a fast folding algorithm to analyze observational data from multiple globular clusters obtained by the Five-hundredmeter Aperture Spherical radio Telescope(FAST), aiming to detect the existence of long-period pulsars. We estimated the impact of the median filtering algorithm in eliminating red noise on the minimum detectable flux density(Smin) of pulsars. Subsequently, we successfully discovered two isolated long-period pulsars in M15 with periods approximately equal to 1.928451 and3.960716 s, respectively. On the P-˙P diagram, both pulsars are positioned below the spin-up line, suggesting a possible history of partial recycling in X-ray binary systems disrupted by dynamical encounters later on. According to timing results, these two pulsars exhibit remarkably strong magnetic fields. If the magnetic fields were weakened during the accretion process, then a short duration of accretion might explain the strong magnetic fields of these pulsars.

引用

页码：170 / 184

页数：15

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