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Pulsar Magnetic Field: Spectral Formation in Her X-1

Published online by Cambridge University Press:  14 August 2015

J. Ventura
J. Ventura*
Affiliation:
Max-Planck-Institut für Physik und Astrophysik, Institut für Extraterrestrische Physik, D-8046 Garching, W.-Germany

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The spectrum of Hercules X-1 reveals line features at 58 keV and probably at 110 keV, which have been interpreted as first and second cyclotron harmonics originating in the radiation from the hot polar cap region of a magnetic neutron star. The inferred magnetic field strength is ~ 5.3 × 1012 Gauss (Trümper et al. 1978). Other noteworthy spectral characteristics of this source are the very ‘flat’ intensity continuum in the frequency range 2 – 20 keV followed by a rather sharp spectral break near 25 keV and an intensity minimum near 40 keV. This spectrum is certainly not reminiscent of typical black-body emission. How can one understand these diverse characteristics?

Type
V. X-Ray and γ-Ray Emission
Information
Symposium - International Astronomical Union , Volume 95: Pulsars , 1981 , pp. 263 - 264
Copyright
Copyright © Reidel 1981 

References

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