arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2502.09342astro-ph.HE
收藏

基于FAST存档数据的PSR J1935+1616(B1933+16)单脉冲形态研究

Single-Pulse Morphology of PSR J1935+1616 (B1933+16) Based on archival data from FAST

R. W. Tian, R. S. Zhao, Marilyn Cruces, H. Liu, D. Li, P. Wang, C. H. Niu, Biping Gong, C. C. Miao, X. Zhu, H. W. Xu, W. L. Li, S. D. Wang, Z. F. Tu, Q. J. Zhi,… 展开作者

R. W. Tian, R. S. Zhao, Marilyn Cruces, H. Liu, D. Li, P. Wang, C. H. Niu, Biping Gong, C. C. Miao, X. Zhu, H. W. Xu, W. L. Li, S. D. Wang, Z. F. Tu, Q. J. Zhi, S. J. Dang, L. H. Shang, S. Xiao

AI总结:

该研究利用FAST存档数据分析PSR J1935+1616的单脉冲形态,识别出微脉冲及形态变化,将脉冲分为四种模式,发现微脉冲与模式A相关性最高,且微结构脉冲相对能量呈双高斯分布。

摘要:

我们利用500米口径球面射电望远镜(FAST)的存档数据,分析了PSR J1935+1616(B1933+16)的单脉冲轮廓形态。结果表明,PSR J1935+1616存在显著的微脉冲现象,且单脉冲轮廓形态具有多种变化。在FAST存档数据中,共识别出969个具有微结构的单脉冲,占总脉冲样本的9.69%,特征宽度为127.63±70.74/-46.25 μs。这些脉冲中约半数呈现准周期微脉冲,周期为231.77±9.90 μs。在520个具有准周期微结构的单脉冲中,208个在圆偏振上也表现出准周期性,特征周期为244.70±45.66/-21.05 μs,圆偏振下的微脉冲特征宽度为106.52±46.14 μs。与正常脉冲相比,具有微结构的单脉冲的相对能量(E/<E>)服从双高斯分布,而正常脉冲服从单高斯分布。基于PSR J1935+1616单脉冲轮廓形态中前导和后随成分的强度,我们将脉冲分为四种形态模式(A、B、C、D)。模式A的脉冲相对能量分布与其他模式显著不同,服从双高斯分布,而模式B、C、D的相对能量分布服从单高斯分布。我们的研究还表明微脉冲与单脉冲轮廓形态之间可能存在相关性:含微脉冲的单脉冲最可能出现在模式A中,而在模式D中出现的可能性最低。

英文摘要:

We utilized archived data from the Five-hundred-meter Aperture Spherical Radio Telescope (FAST) to analyze the single-pulse profile morphology of PSR J1935$+$1616 (B1933$+$16). The results show that PSR J1935$+$1616 exhibits significant micropulses as well as various changes in single-pulse profile morphology. In the FAST archived data, a total of 969 single pulses with microstructure were identified, accounting for 9.69$\%$ of the total pulse sample, with characteristic widths of $127.63^{+70.74}_{-46.25}$ $μ$s. About half of these pulses display quasiperiodic micropulses, with a periodicity of 231.77 $\pm$ 9.90 $μ$s. Among the 520 single pulses with quasiperiodic microstructure, 208 also exhibit quasiperiodicity in circular polarization, with a characteristic period of $244.70^{+45.66}_{-21.05}$ $μ$s. The micropulse characteristic width in circular polarization is 106.52 $\pm$ 46.14 $μ$s. Compared to normal pulses, the relative energy (E/<E>) of single pulse with microstructure follows a double Gaussian distribution, while that of normal pulses follows a single Gaussian distribution. Based on the intensity of the leading and trailing components in the single-pulse profile morphology of PSR J1935+1616, we classified the pulses into four morphological modes (A, B, C, and D). The relative energy distribution of pulses in mode A is significantly different from the others, following a double Gaussian distribution, while the relative energy distributions in modes B, C, and D follow a single Gaussian distribution. Our study also suggests a possible correlation between micropulses and single-pulse profile morphology. Single pulse with micropulses are most likely to occur in mode A, while their occurrence is least likely in mode D.

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。

↑