High-Resolution Radio Study of the Dragonfly Pulsar Wind Nebula

Ruolan Jin^1*, C.-Y. Ng², Mallory S.E. Roberts³, Kwan-Lok Li¹

¹Department of Physics, National Cheng Kung University, Tainan, Taiwan
²Department of Physics, The University of Hong Kong, Hong Kong
³Eureka Scientific, California, USA

* Presenter:Ruolan Jin, email:ruolanjin@gmail.com

Rotation-powered pulsars produce relativistic magnetized winds that interact with the ambient medium to create pulsar wind nebulae (PWNe). The Dragonfly PWN (G75.2+0.1) powered by the young pulsar J2021+3651 is clearly resolved with a double tori structure and a polar jet in X-rays. Our new radio data taken with the Very Large Array (VLA) at 6 GHz reveal a radio PWN two times larger than its X-ray counterpart and a spectrum softer than typical PWNe. Its polarization map shows a highly ordered and complex magnetic field structure suggesting a toroidal field distorted by the pulsar’s motion. Although a bow-shock structure has already been discovered according to our radio L-band (1.5 GHz) and the archival X-ray data, the ram pressure does not destroy the torus and jet. It indicates that this young PWN is likely a rare case moving trans-sonically.

Keywords: Pulsar wind nebulae, Pulsars, Radio interferometry, Polarimetry