Physics – Nuclear Physics
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nuphs..14...28c&link_type=abstract
Nuclear Physics B Proceedings Supplements, Volume 14, Issue 1, p. 28-37.
Physics
Nuclear Physics
7
Scientific paper
In this paper we concentrate on the emission of TeV γ - rays from radio pulsars. It will be shown that the polar gap model fails to explain the observed TeV flux levels: The X-ray luminosity should exceed the TeV luminosity if the latter originates from the polar gap regions. The outer gap model of Cheng, Ho and Ruderman provides a consistent picture of TeV γ - ray emission: The total gap power is converted to TeV γ - rays by means of the inverse Compton scattering of primary electrons on the abundant soft IR flux in and around the gap. A fraction exp(-f-1/2) escapes photon-photon absorption and may be observable Here f (~ 0.1 for Vela and Vela-like pulsars) is the fraction of the open magnetosphere occupied by the gap. The remaining power is used for the gap sustaining mechanism. As the pulsar grows older, f --> 1 and the TeV power increases and becomes comparable to the spindown power. This is the so-called ``post Vela-like'' stage. The model is applied to millisecond pulsars which are all Vela- and post Vela-like. The luminosity estimates are consistent with the TeV observations - despite the experimental uncertainties and theoretical assumptions.
Cheng Kwong Sang
de Jager Ocker C.
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