Fitting Pulsar Wind Tori

Details Fitting Pulsar Wind Tori Fitting Pulsar Wind Tori

2003-10-06

arxiv.org/abs/astro-ph/0310155v1

Astrophys.J. 601 (2004) 479-484

Astronomy and Astrophysics

Astrophysics

10 pages, 2 figures; to appear in the Astrophysical Journal

Scientific paper

10.1086/380486

CXO imaging has shown that equatorial tori, often with polar jets, are very common in young pulsar wind nebulae (PWNe). These structures are interesting both for what they reveal about the relativistic wind itself and for the (nearly) model-independent measurement of the neutron star spin orientation they provide. The later is a particularly valuable probe of pulsar emission models and of neutron star physics.We describe here a procedure for fitting simple 3-D torus models to the X-ray data which provides robust estimates of the geometric parameters. An application to 6 PWN tori gives orientations, PWN shock scales and post-shock wind speeds along with statistical errors. We illustrate the use of these data by commenting on the implications for kick physics and for high energy beaming models.

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