Detection of strong scattering close to the eclipse region of PSR B1957+20

被引：9
|
作者：
Bai, J. T. [1 ]
Dai, S. [2 ]
Zhi, Q. J. [1 ,3 ]
Coles, W. A. [4 ]
Li, D. [5 ,6 ,7 ]
Zhu, W. W. [5 ,6 ]
Hobbs, G. [8 ]
Qiao, G. J. [9 ]
Wang, N. [10 ]
Yuan, J. P. [10 ]
Filipovic, M. D. [2 ]
Wang, J. B. [10 ]
Pan, Z. C. [5 ,6 ]
Shang, L. H. [1 ]
Dang, S. J. [1 ]
Wang, S. Q. [10 ]
Miao, C. C. [5 ,6 ]
机构：
[1] Guizhou Normal Univ, Sch Phys & Elect Sci, Guiyang 550001, Peoples R China
[2] Western Sydney Univ, Sch Sci, Locked Bag 1797, Penrith, NSW 2751, Australia
[3] Guizhou Normal Univ, Guizhou Prov Key Lab Radio Astron & Data Proc, Guiyang 550001, Peoples R China
[4] Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
[5] Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
[6] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[7] Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr, ZA-4000 Durban, South Africa
[8] CSIRO Space & Astron, POB 76, Epping, NSW 1710, Australia
[9] Peking Univ, Sch Phys, Beijing 100871, Peoples R China
[10] Xinjiang Astron Observ, 150,Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2022年 / 513卷 / 02期
基金：
中国国家自然科学基金; 澳大利亚研究理事会;
关键词：
scattering; binaries: eclipsing; pulsars: general; pulsars: individual: PSR B1957+20; MILLISECOND PULSAR; ORBITAL EVOLUTION; GIANT PULSES; SOLAR-WIND; BINARY; DISCOVERY; SCINTILLATION; PROPAGATION; VARIABILITY; NEBULA;
D O I：
10.1093/mnras/stac918
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the first measurement of pulse scattering close to the eclipse region of PSR B1957+20, which is in a compact binary system with a low-mass star. We measured pulse scattering time-scales up to 0.2 ms close to the eclipse and showed that it scales with the dispersion measure (DM) excess roughly as tau proportional to Delta DM2. Our observations provide the first evidence of strong scattering due to multipath propagation effects in the eclipsing material. We show that Kolmogorov turbulence in the eclipsing material with an inner scale of similar to 100 m and an outer scale of the size of the eclipse region can naturally explain the observation. Our results show that the eclipsing material in such systems can be highly turbulent and suggest that scattering is one of the main eclipsing mechanisms at around 1.4 GHz.
引用
收藏
页码：1794 / 1800
页数：7
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