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Red and blue shifts near compact objects

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Abstract

We show that radiation emitted from material falling toward a black hole or neutron star can be blue-shifted as well as red-shifted. Although the red shift can be arbitrarily large near a black hole, there is an upper limit for the blue shift of 1/2. Material incident toward the poles of a magnetic neutron star can simultaneously radiate red and blue-shifted lines. Near an oblique magnetic rotator, the red and blue shifts will show a sinusoidal variation. Such spectral variations are associated with SS 433.

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Authors and Affiliations

  1. Department of Physics, University of Pennsylvania, Philadelphia, PA, USA

    Jeffrey M. Cohen

  2. Department of Astronomy and Astrophysics, University of Pennsylvania, Philadelphia, PA, USA

    Mitchell F. Struble

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  1. Jeffrey M. Cohen
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  2. Mitchell F. Struble
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Cohen, J.M., Struble, M.F. Red and blue shifts near compact objects. Astrophys Space Sci 73, 507–511 (1980). https://doi.org/10.1007/BF00642428

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  • DOI: https://doi.org/10.1007/BF00642428

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