ar X iv : a st ro - p h / 05 09 90 1 v 1 3 0 Se p 20 05 The high - energy gamma - ray light curve of PSR B 1259 − 63
نویسنده
چکیده
The high-energy gamma-ray light curve of the binary system PSR B1259 −63, is computed using the approach that successfully predicted the spectrum at periastron. The simultaneous INTEGRAL and H.E.S.S. spectra taken 16 days after periastron currently permit both a model with dominant radiative losses, high pulsar wind Lorentz factor and modest efficiency as well as one with dominant adiabatic losses, a slower wind and higher efficiency. In this paper we shown how the long-term light curve may help to lift this degeneracy.
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Three scenarios are proposed to understand the jumps of the projected pulsar semimajor axis in periastron passages observed via 13-year timing for PSR B1259-63. Planet-like objects are suggested to orbit around the Be star, which may perturb gravitationally the pulsar (with probably a low mass) when it passes though the periastrons. An accretion disk should exist outside the pulsar's light cyli...
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