Year: 2022
Type: article
Abstract: 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 τ ∝ ΔDM2. 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 ∼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.
Institutions: Guizhou Normal University, Western Sydney University, University of California San Diego, Chinese Academy of Sciences, National Astronomical Observatories, University of Chinese Academy of Sciences, University of KwaZulu-Natal, Commonwealth Scientific and Industrial Research Organisation, Peking University, Xinjiang Astronomical Observatory
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: Foundation for Angelman Syndrome Therapeutics, Australian Government, National Natural Science Foundation of China, Chinese Academy of Sciences, Australian Research Council, National Astronomical Observatories, Chinese Academy of Sciences, Center for Advanced Study, University of Illinois at Urbana-Champaign
OpenAlex ID: W4221145809