A polarization study of the supernova remnant CTB 80

We present a radio polarization study of the supernova remnant CTB 80 based on images at 1420 MHz from the Canadian Galactic Plane Survey, at 2695 MHz from the Effelsberg survey of the Galactic plane and at 4800 MHz from the Sino-German λ6 cm polarization survey of the Galactic plane. We obtained a...

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Bibliographic Details
Published in:Research in astronomy and astrophysics 2020-11, Vol.20 (11), p.186
Main Authors: Li, Xiang-Hua, Sun, Xiao-Hui, Reich, Wolfgang, Gao, Xu-Yang
Format: Article
Language:English
Subjects:
Galactic rotation
ISM: magnetic fields
ISM: supernova remnants
Nebulae
Polarization
Polls & surveys
Pulsar winds
Pulsars
Shells (structural forms)
Space telescopes
Stellar winds
Supernova
Supernova remnants
Supernovae
techniques: polarimetric
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Summary:We present a radio polarization study of the supernova remnant CTB 80 based on images at 1420 MHz from the Canadian Galactic Plane Survey, at 2695 MHz from the Effelsberg survey of the Galactic plane and at 4800 MHz from the Sino-German λ6 cm polarization survey of the Galactic plane. We obtained a rotation measure (RM) map using polarization angles at 2695 MHz and 4800 MHz as the polarization percentages are similar at these two frequencies. RM exhibits a transition from positive values to negative values along one of the shells hosting the pulsar PSR B1951+32 and its pulsar wind nebula. The reason for the change in sign remains unclear. We identified a partial shell structure, which is bright in polarized intensity but weak in total intensity. This structure could be part of CTB 80 or part of a new supernova remnant unrelated to CTB 80.
ISSN:1674-4527
DOI:10.1088/1674-4527/20/11/186