Constraints on Pulsar Magnetospheric and Wind Parameters for the Compact Nebulae of Vela and PSR B1706−44 | Zendy

Ramotholo Sefako | Zendy; O. C. de Jager | Zendy

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Constraints on Pulsar Magnetospheric and Wind Parameters for the Compact Nebulae of Vela and PSR B1706−44

Author(s) -

Ramotholo Sefako,

O. C. de Jager

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/376567

Subject(s) - vela , pulsar , physics , astrophysics , nebula , magnetosphere , pulsar wind nebula , radius , synchrotron , spectral line , astronomy , plasma , stars , optics , computer security , quantum mechanics , computer science

We present a new model for the synchrotron compact nebular emissions for Velaand PSR B1706-44, and derive fundamental pulsar/plerion parameters such as thepair production multiplicity, M, and wind magnetization parameter, sigma. Thepair cascade above the pulsar polar cap, combined with the energy from thepulsar wind, injects a pair plasma into the surrounding environment. This wind,consisting of particles and fields, is shocked by the environment, resulting insynchrotron emission from "thermalized" pairs in a compact nebula. The broadband nebular spectrum depends crucially on the spindown power, distance, pairmultiplicity, pulsar wind shock radius and sigma at this shock. We constructsuch a model for the particle spectra in the compact X-ray nebula of Vela andPSR B1706-44. Fits to the multiwavelength spectra of these sources indicatethat 300

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