Long-term periodicity in LS I +61 ◦ 303 as beat frequency between orbital and precessional rate

  title={Long-term periodicity in LS I +61 ◦ 303 as beat frequency between orbital and precessional rate},
  author={Maria Sole Massi and Fr{\'e}d{\'e}ric Jaron},
  journal={Astronomy and Astrophysics},
Context: In the binary system LSI+61303 the peak flux density of the radio outburst, which is related to the orbital period of 26.4960 +/- 0.0028d, exibits a modulation of 1667 +/- 8 d. The radio emission at high spatial resolution appears structured in a precessing jet with a precessional period of 27-28 d. Aims: How close is the precessional period of the radio jet to the orbital period? Any periodicity in the radio emission should be revealed by timing analysis. The aim of this work is to… 

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