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

@article{Massi2013LongtermPI,
  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},
  year={2013},
  volume={554}
}
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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References

SHOWING 1-10 OF 42 REFERENCES

Long-Term Flux Monitoring of LSI +61°303 at 2.25 and 8.3 GHz

LSI +61°303 is an exotic binary system consisting of a ~10 M☉ B star and a compact object that is probably a neutron star. The system is associated with the interesting radio source GT 0236+610,

Bayesian Analysis of Radio Observations of the Be X-Ray Binary LS I +61°303

The binary star LS I +61°303 is remarkable for its periodic radio outbursts every 26.5 days. We recently discovered a ~4.4 yr periodic modulation of the phase and amplitude of these outbursts using

RADIO SPECTRAL INDEX ANALYSIS AND CLASSES OF EJECTION IN LS I +61°303

LS I +61°303 is a γ-ray binary with periodic radio outbursts coincident with the orbital period of P = 26.5 days. The origin of the radio emission is unclear, it could be due either to a jet, as in

VLBA images of the precessing jet of LS I +61°303

Context: In 2004, changes in the radio morphology of the Be/X-ray binary system LSI+61303 suggested that it is a precessing microquasar. In 2006, a set of VLBA observations performed throughout the

Bayesian Periodic Signal Detection. II. Discovery of Periodic Phase Modulation in LS I +61°303 Radio Outbursts

A Bayesian analysis of the phase variations of the 26.5 day periodic radio outbursts from the high-mass X-ray binary LS I +61°303 demonstrates a clear periodic modulation on a timescale similar to

Two-frequency radio spectra during an outburst of the periodic radio star LS1 +61/sup 0/303

We preent the results of simultaneous observations of the periodic source LSI+61/sup 0/303 at 5.0 and 10.5 GHz during the radio outburst of 1981 August--September. The source is optically thin during

Feasibility study of Lense-Thirring precession in LS I +61°303

Context. Very recent analysis of the radio spectral index and high energy observations have shown that the two-peak accretion/ejection microquasar model applies for LS I +61 ◦ 303. Aims. The fast

Hints for a fast precessing relativistic radio jet in LS I + 61° 303

Here we discuss two consecutive MERLIN observations of the X-ray binary LS I +61 ◦ 303. The first observation shows a double-sided jet extending up to about 200 AU on both sides of a central source.

The radio to TeV orbital variability of the microquasar LS I +61 303

Context. The microquasar LS I +61 303 has recently been detected at TeV energies by the Cherenkov telescope MAGIC, presenting variability on timescales similar to its orbital period. This system has

Periodic morphological changes in the radio structure of the gamma-ray binary LS 5039

Context. Gamma-ray binaries allow us to study physical processes such as particle acceleration up to TeV energies as well as very high energy gamma-ray emission and absorption with changing