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: http://www.naic.edu/~astro/talks/abstracts/yash.html
Дата изменения: Wed Dec 5 20:01:12 2001
Дата индексирования: Sat Dec 22 05:36:10 2007
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Arecibo Observatory Colloquium Series
Cones vs. Patches : Understanding the Geometry of Radio Pulsar Emission Regions
Yashwant Gupta, TIFR Pune University
Abstract:
One important clue to unravelling the outstanding puzzle of pulsar emission
physics can come from a detailed localization of the regions in the pulsar
magnetosphere which emit the radio radiation. Different tools brought to
bear upon the problem of pulsar emission geometry will be discussed. New
results using some of the old techniques (like scintillation studies), as
well as new techniques and results using single pulse studies and
simultaneous dual frequency observations will be described. Many of our
new results favour a conal geometry for the arrangement of emission regions
and allow accurate estimates of the emission heights and polar cap
locations for the emission cones to be obtained. These results indicate
that pulsar emission cones may be located at around half-way out the edge
of the polar cap and at altitudes of a few hundred to a thousand
kilometers above the neutron star surface.