| Title | Detection of strong scattering close to the eclipse region of PSR B1957+20 |
| Authors | Bai, J. T. Dai, S. Zhi, Q. J. Coles, W. A. Li, D. Zhu, W. W. Hobbs, G. Qiao, G. J. Wang, N. Yuan, J. P. Filipovic, M. D. Wang, J. B. Pan, Z. C. Shang, L. H. Dang, S. J. Wang, S. Q. Miao, C. C. |
| Affiliation | Guizhou Normal Univ, Sch Phys & Elect Sci, Guiyang 550001, Peoples R China Western Sydney Univ, Sch Sci, Locked Bag 1797, Penrith, NSW 2751, Australia Guizhou Normal Univ, Guizhou Prov Key Lab Radio Astron & Data Proc, Guiyang 550001, Peoples R China Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China Univ Chinese Acad Sci, Beijing 100049, Peoples R China Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr, ZA-4000 Durban, South Africa CSIRO Space & Astron, POB 76, Epping, NSW 1710, Australia Peking Univ, Sch Phys, Beijing 100871, Peoples R China Xinjiang Astron Observ, 150,Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China |
| Keywords | MILLISECOND PULSAR ORBITAL EVOLUTION GIANT PULSES SOLAR-WIND BINARY DISCOVERY SCINTILLATION PROPAGATION VARIABILITY NEBULA |
| Issue Date | 3-May-2022 |
| Publisher | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
| Abstract | 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. |
| URI | http://hdl.handle.net/20.500.11897/643036 |
| ISSN | 0035-8711 |
| DOI | 10.1093/mnras/stac918 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 |
