Discovery of a radio nebula around PSR J0855−4644. (20th March 2018)

• Record Type: Journal Article
• Authors: Maitra, C; Roy, S; Acero, F; Gupta, Y
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 477:Number 1(2018:Jun.)
• Page Start: L66
• Page End: L69
• Publication Date: 2018-03-20
• Subjects: pulsars: individual: PSR J0855−4644 -- radio continuum: ISM; Astronomy -- Research -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnrasl/sly038
• Languages: English
• ISSNs: 1745-3933

Abstract

Abstract: We report the discovery of a diffuse radio emission around PSR J0855−4644 using an upgraded GMRT ( uGMRT ) observation at 1.35 GHz. The radio emission is spatially coincident with the diffuse X-ray pulsar wind nebula (PWN) seen with XMM–Newton but is much larger in extent compared to the compact axisymmetric PWN seen with Chandra . The morphology of the emission, with a bright partial ring-like structure and two faint tail-like features strongly resembles a bow shock nebula, and indicates a velocity of 100 km s −1 through the ambient medium. We conclude that the emission is most likely to be associated with the radio PWN of PSR J0855−4644. From the integrated flux density, we estimate the energetics of the PWN.