2021/01/11 by Hao Tong, H. Tong, Piao Wang +4 · 19 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics #Dipole #Field line #Geophysics and Gravity Measurements #High-pressure geophysics and materials #Magnetar #Magnetic field #Magnetosphere #Neutron star #Physics #Polarization (electrochemistry) #Position (finance) #Position angle #Pulsar #Pulsars and Gravitational Waves Research #astro-ph.HE
paper · pdf · doi:10.1093/mnras/stab108
published in Monthly Notices of the Royal Astronomical Society 502(1), 1549-1556 (Oxford University Press) · 8 pages. Accepted in MNRAS
arxiv created 2021/01/11 · openalex publication_date 2021/01/15 · arxiv updated 2021/01/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
ABSTRACT The modification of the rotating vector model in the case of magnetars are calculated. Magnetars may have twisted magnetic field compared with normal pulsars. The polarization position angle of magnetars will change in the case of a twisted magnetic field. For a twisted dipole field, we found that the position angle will change both vertically and horizontally. During the untwisting process of the magnetar magnetosphere, the modifications of the position angle will evolve with time monotonously. This may explain the evolution of the position angle in magnetar PSR J1622-4950 and XTE J1810-197. The relation between the emission point and the line of sight will also change. We suggest every magnetospheric models of magnetars also calculate the corresponding changes of position angle in their models. Order of magnitude estimation formula for doing this is given. This opens the possibility to extract the magnetic field geometry of magnetars from their radio polarization observations.