Reverberation of the Vela Pulsar Wind Nebula

Transonic (with Mach number ) motion of a pulsar relative to the external medium can help its compact pulsar wind nebula develop a double-torus X-ray morphology. The double-torus structure can reverberate as a whole under the dynamic pressure of the external flow. For a flow aligned with the symmetr...

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Bibliographic Details
Published in:Astronomy letters 2023-12, Vol.49 (12), p.777-786
Main Authors: Petrov, A. E., Levenfish, K. P., Ponomaryov, G. A.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Astroparticles
Dynamic pressure
External pressure
Mach number
Nebulae
Observations and Techniques
Physics
Physics and Astronomy
Pulsar winds
Pulsars
Reverberation
Stellar winds
Toruses
Wind
X-ray astronomy
X-rays
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Summary:Transonic (with Mach number ) motion of a pulsar relative to the external medium can help its compact pulsar wind nebula develop a double-torus X-ray morphology. The double-torus structure can reverberate as a whole under the dynamic pressure of the external flow. For a flow aligned with the symmetry axis of the nebula, the response of the double-torus is uniform in azimuth. For a misaligned flow, the leeward sides of the tori respond with some delay relative to their windward sides. The delay can cause a curious swaying in the short midsection of the leeward jet of the compact X-ray nebula. Within the framework of the relativistic magnetohydrodynamical model of a pulsar wind nebula we study the dynamics of the nebular outflows contributing to the swaying of the jet. When applied to the Vela X-ray nebula, the model allows us to naturally relate two distinct phenomena, the swaying of the bright midsection of the Vela lee jet and the reverberation of its double-torus.
ISSN:1063-7737
1562-6873
DOI:10.1134/S106377372312006X