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Hints for a fast precessing relativistic radio jet in LS I+61·303
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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 jet shows a bent S-shaped struct ure similar to the one displayed by the well-known precessing jet of SS 433. The precession suggested in the first MERLIN image becomes evident in the second one, showing a one-sided bent jet significantly rotated with respect to the jet of the day before. We conclude that the derived precession of the relativistic (β=0.6) jet explains puzzling previous VLBI results. Moreover , the fact that the precession is fast could be the explanation of the never understood short term (days) variability of the associated gamma-ray source 2CG 135 + 01 / 3EG J0241 + 6103.
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MASSI, M., et al. Hints for a fast precessing relativistic radio jet in LS I+61·303. Astronomy and Astrophysics. 2004. Vol. 414, num. 1, pags. L1-L4. ISSN 0004-6361. [consulted: 11 of August of 2026]. Available at: https://hdl.handle.net/2445/45340