Abstract
THE wavelengths of the shifted optical lines in SS433 seem to show a periodic variability at a period of 160 ± 3 d (or a multiple integer thereof)1,2. We have suggested that such periodicity could arise if the lines were emitted from a precessing ring of matter orbiting around a massive black hole (BH) of mass M (ref. 3). We also suggested that SS433 may be located inside an old globular cluster3. We describe here, in principle, how such precession model may come about and what some of its observational constraints might be.
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AMITAI-MILCHGRUB, A., PIRAN, T. & SHAHAM, J. A processing ring model for SS433. Nature 280, 473–474 (1979). https://doi.org/10.1038/280473a0
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DOI: https://doi.org/10.1038/280473a0
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