doi.org
VLBI astrometry on the white dwarf pulsar AR Scorpii
January 2023 • Pengfei Jiang, Lang Cui, Jun Yang, Bo Zhang, Shuangjing Xu, Fengchun Shu, Jiang Wu, Wen Chen, Guanghui Li, Bo Xia, Stuart Weston, Sergei Gulyaev, Hon…
AR Scorpii (AR Sco), the only-known radio-pulsing white dwarf binary, shows unusual pulsating emission at the radio, infrared, optical and ultraviolet bands. To determine its astrometric parameters at the radio band independently, we conducted multi-epoch Very Long Baseline Interferometry (VLBI) phase-referencing observations with the European VLBI Network (EVN) at 5 GHz and the Chinese VLBI Network (CVN) plus the Warkworth 30-metre telescope (New Zealand) at 8.6 GHz. By using the differential VLBI astrometry, we …