Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978grsa.rept..418w&link_type=abstract
In its Gamma Ray Spectry. in Astrophys. p 418-424 (SEE N78-31971 22-88)
Astronomy and Astrophysics
Astrophysics
Cyclotron Radiation, Hercules Nova, Line Spectra, Neutron Stars, Stellar Magnetic Fields, Stellar Magnetospheres, X Ray Spectra, Compton Effect, Magnetospheric Proton Density, Photons, Stellar Luminosity
Scientific paper
Cyclotron emission from a strong magnetic field, has been proposed to identify line feature observed in the hard X-ray spectrum of the neutron star Hercules X-1. If this interpretation is indeed correct, and if the model wherein the 1.24 second hard X-ray pulse is due to the occultation of a more isotropic X-ray flux by an opaque magnetospheric shell is accepted then these observations can be used to place strict limits on the total source luminosity of the cyclotron emission. The observational fate of cyclotron line photons that have emerged from the region near the neutron star surface, but have yet to encounter an opaque shell at the magnetosphere is discussed. It is shown that if a narrow line is incident on such a shell, then a residual narrow feature can emerge from the shell.
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