A new nearby PWN overlapping the Vela Jr SNR
F. Acero, Y. Gallant, R. Terrier, M. Renaud, J. Ballet

TL;DR
This paper reports the discovery and confirmation of a pulsar wind nebula associated with PSR J0855-4644 near the Vela Jr supernova remnant, providing insights into its distance and potential contribution to cosmic-ray leptons.
Contribution
The study presents the first X-ray detection of the PWN around PSR J0855-4644 and estimates its distance, suggesting a nearby origin and possible influence on cosmic-ray spectra.
Findings
Confirmed the X-ray counterpart of the pulsar and its PWN.
Estimated the pulsar's distance to be less than 900 pc.
Indicated the pulsar's potential contribution to cosmic-ray leptons.
Abstract
PSR J0855-4644 is an energetic pulsar (Edot = 1.1x10^36 erg/s, P=65 ms) discovered near the South-East rim of the supernova remnant (SNR) RX J0852.0-4622 (aka Vela Jr) by the Parkes Multibeam Survey. The position of the pulsar is in spatial coincidence with an enhancement in X-rays and TeV gamma-rays, which could represent its pulsar wind nebula (PWN). We have revealed with an XMM-Newton observation the X-ray counterpart of the pulsar together with a surrounding extended emission thus confirming the suggestion of a PWN. The comparison of the absorption column density derived in X-rays from the pulsar with 12CO observations (tracing the dense gas) is used to derive an upper limit to the distance of the pulsar (d< 900 pc) and to discuss a possible association of the pulsar with the Vela Jr SNR. This new distance estimate implies that the pulsar is nearby and could therefore significantly…
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Taxonomy
TopicsParticle accelerators and beam dynamics · Magnetic confinement fusion research · Particle Accelerators and Free-Electron Lasers
