The effect of vacuum birefringence on the polarization of X-ray binaries and pulsars

Details The effect of vacuum birefringence on the polarization of X-ray binaries and pulsars The effect of vacuum birefringence on the polarization of X-ray binaries and pulsars

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...215l.117n&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 215, Aug. 1, 1977, p. L117-L120.

Astronomy and Astrophysics

Astronomy

23

Binary Stars, Birefringence, Polarization Characteristics, Pulsars, X Ray Astronomy, X Ray Binaries, X Ray Stars, Emission Spectra, Neutron Stars, Phase Shift, Stellar Radiation, X Ray Sources

Scientific paper

In a strong magnetic field the vacuum becomes birefringent. This effect is especially important for pulsars at X-ray wavelengths. Any polarized X-ray emission from the surface of a magnetic neutron star becomes depolarized as it propagates through the magnetic field. The soft X-ray emission from AM Her, believed to be a magnetic white dwarf, may show about one radian of phase retardation. In this case, circular polarization of the X-ray flux would be a characteristic signature of vacuum birefringence.

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