On the spectra and pulse profiles of gamma-ray pulsars

Details On the spectra and pulse profiles of gamma-ray pulsars On the spectra and pulse profiles of gamma-ray pulsars

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...420l..79s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 420, no. 2, p. L79-L82

Astronomy and Astrophysics

Astrophysics

65

Compton Effect, Light (Visible Radiation), Monte Carlo Method, Pair Production, Pulsar Magnetospheres, Pulsars, X Ray Spectra, Line Of Sight, Luminosity, Magnetic Fields, Magnetic Poles, Neutron Stars, Polar Caps

Scientific paper

We model spectra and pulse profiles of gamma-ray pulsars assuming that the pulsar's magnetic axis is nearly aligned with its rotation axis. In this model, the nonthermal energy of electrons flowing outward along field lines connected to the light cylinder is efficiently converted to gamma rays via magnetic Compton scattering of optical and soft X-ray photons. The hard photons initiate a pair cascade in the pulsar magnetosphere through magnetic pair production followed by synchrotron emission. The calculated spectra are used to fit gamma-ray pulsar observations. This model produces a hollow cone of emission which can reproduce both the broad single-peaked and narrow double-peaked pulse profiles observed from gamma-ray pulsars.

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