Evolution of a Pulsar Wind Nebula within a Composite Supernova Remnant

Abstract

The interaction between a pulsar wind nebula (PWN) and its host supernova remnant (SNR) can produce a vast array of observable structures. Asymmetry present within these structures derives from the complexity of the composite system, where many factors take turns playing a dominating hand throughout the stages of composite SNR evolution. Of particular interest are systems characterized by blastwave expansion within a nonuniform interstellar medium (ISM), which contain an active pulsar having a substantial "kick" velocity (upward of 300 km s${}^{-1}$ ), because these systems tend to produce complex morphologies. We present a numerical model that employs these and several other factors in an effort to generate asymmetry similar to that seen in various X-ray and radio observations. We find that the main parameters driving structure are ISM uniformity and total pulsar spin- down energy, with secondary contributions from factors such as pulsar trajectory and initial spin-down luminosity. We also investigate the dynamics behind PWN "tails," which may form to link active pulsars to a crushed, relic nebula as the reverse shock passes. We find that the directions of such tails are not good indicators of pulsar motion, but direction does reveal the flow of ejecta created by the passage of a reverse shock.

13 pages, 14 figures, accepted to ApJ

References in corpus (6)

• Direct cosmological simulations of the growth of black holes and galaxies
• A Dynamical Model for the Evolution of a Pulsar Wind Nebula inside a Non-Radiative Supernova Remnant
• A Half-Megasecond Chandra Observation of the Oxygen-Rich Supernova Remnant G292.0+1.8
• An axis-free overset grid in spherical polar coordinates for simulating 3D self-gravitating flows
• The Infrared Detection of the Pulsar Wind Nebula in the Galactic Supernova Remnant 3C 58
• Nonuniform Expansion of the Youngest Galactic Supernova Remnant G1.9+0.3

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• Proper Motion of the High-Velocity Pulsar in SNR MSH 15-56
• Deciphering the Nature of the Pulsar Wind Nebula CTB 87 with XMM-Newton
• Introducing the HD+B model for pulsar wind nebulae: a hybrid hydrodynamics/radiative approach