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| Crab脉冲星巨脉冲辐射等待时间分布的非稳态泊松模拟 | |
| Alternative Title | Waiting Time Distribution of Giant Pulses from the Crab Pulsar Modeled with a Non-stationary Poisson Process |
王辉1; 温志刚2 ; 王娜2; 王洪光3; 陈建玲1; 袁建平2; 袁少南2; 李健2; 吕成冰3; 王金鹏1; 闫文明2; 托乎提努尔4; 崔思然1
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| 2024-03-01 | |
| Source Publication | 天文学报
 |
| ISSN | 0001-5245 |
| Volume | 65Issue:2Pages:105-112 |
| Contribution Rank | 2 |
| Abstract | 利用中国科学院新疆天文台南山观测站26 m射电望远镜,在中心频率1556 MHz,对Crab脉冲星(PSR B0531+21)进行了长达12.6 h的连续观测,观测带宽为512 MHz,时间分辨率为32μs,研究了巨脉冲辐射的等待时间分布特征.观测共探测到2097个信噪比大于10的巨脉冲,对应的流量密度大于100 Jy.巨脉冲的爆发率表现为高度的间歇性,在较短的时间内具有较高的爆发率,在相对长的宁静期内巨脉冲的爆发率较低,尤其是中间脉冲相位内的巨脉冲爆发.相邻两个巨脉冲的等待时间分布表现为幂律分布特征,可以用一个非稳态的泊松过程进行模拟,这表明巨脉冲的爆发是一种独立的随机事件.此外,主脉冲和中间脉冲相位上的巨脉冲具有不同的等待时间分布特征,这意味着脉冲星不同磁极的巨脉冲辐射机制可能是不同的.这些观测结果对于理解脉冲星的射电辐射机制具有重要意义. |
| Other Abstract | We study the waiting time distribution of giant pulses from the Crab pulsar observed with the Nanshan 26-m radio telescope at a center frequency of 1556 MHz with 512 MHz bandwidth. The observations were performed over a duration of 12.6 hours with 32 μs sampling interval. Our analysis has led to the detection of 2097 giant pulses above a threshold of 10 o, with flux density>100 Jy. The occurrence rate of giant pulses is characterized by a highly intermittent giant pulse productivity in short clusters with high rates, separated by relatively long quiescent intervals with low occurrence rates, especially for the giant pulses associated with the interpulse emission. The distribution of waiting times between two subsequent giant pulses displays a power-law tail and can be modeled with a non-stationary Poisson process, which indicates that giant pulses are independent and random events. Distinct waiting time distributions between giant pulses in the main pulse and interpulse phases are presented, which implies that the giant pulseemission mechanisms maybe different in the opposite magnetic poles. The ramification for our understanding of the radio emission mechanisms is discussed. |
| Keyword | 脉冲星:个别:Crab 脉冲星:巨脉冲 方法:观测 方法:数据分析 |
| DOI | 10.15940/j.cnki.0001-5245.2024.02.008 |
| URL | 查看原文 |
| Indexed By | CSCD ; 中文核心期刊要目总览 |
| Language | 中文 |
| WOS ID | CSCD:7691930 |
| CSCD ID | CSCD:7691930 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/7587 |
| Collection | 射电天文研究室_脉冲星研究团组 射电天文研究室_数字技术实验室 科研仪器设备产出_利用南山26米射电望远镜（NSRT）观测数据的文章 |
| Corresponding Author | 温志刚 |
| Affiliation | 1.运城学院物理与电子工程系，运城 044000; 2.中国科学院新疆天文台，乌鲁木齐 830011; 3.广州大学物理与电子工程学院，广州 510006; 4.季华实验室，佛山 528200 |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | 王辉,温志刚,王娜,等. Crab脉冲星巨脉冲辐射等待时间分布的非稳态泊松模拟[J]. 天文学报,2024,65(2):105-112. |
| APA | 王辉.,温志刚.,王娜.,王洪光.,陈建玲.,...&崔思然.(2024).Crab脉冲星巨脉冲辐射等待时间分布的非稳态泊松模拟.天文学报,65(2),105-112. |
| MLA | 王辉,et al."Crab脉冲星巨脉冲辐射等待时间分布的非稳态泊松模拟".天文学报 65.2(2024):105-112. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 王辉-2024-Crab脉冲星巨脉冲辐射（721KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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