Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.308..828s&link_type=abstract
Nature (ISSN 0028-0836), vol. 308, April 26, 1984, p. 828-830.
Astronomy and Astrophysics
Astronomy
10
Companion Stars, Gamma Ray Spectra, Pair Production, Pulsars, Stellar Magnetic Fields, X Ray Stars, Astronomical Models, Binary Stars, Gamma Ray Astronomy, Light Curve, Magnetic Effects, Radio Sources (Astronomy)
Scientific paper
It is shown that high-energy gamma rays traversing the magnetic field around the binary system Cygnus X-3 could be attenuated by the magnetic pair production process, resulting in the rather sharp steepening of the gamma ray spectrum beyond about 10 to the 16th eV. The observed spectral steepening is used to derive a magnetic field strength of 0.7 G in the region of about 10 to the 14th cm, where most of the observed radio emission occurs. The observed light curve above 10 to the 15th eV shows only one significant narrow peak at a phase of about 0.2 from the X-ray minimum. This may be due to magnetic bending of the charged particles by the pulsar before interaction with the enshrouded gas. It is predicted that the relative contribution of steady flux should increase beyond 10 to the 16th eV.
Stephens Alfred S.
Verma Ram Prakash
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