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Title: Hints for a fast precessing relativistic radio jet in LS I+61·303
Author: Massi, M.
Ribó Gomis, Marc
Paredes i Poy, Josep Maria
Garrington, S. T.
Peracaula i Bosch, Marta
Martí Ribas, Josep
Keywords: Estels
Estels binaris de raigs X
Raigs gamma
Astronomia de raigs gamma
X-ray binaries
Radio astronomy
Gamma rays
Gamma ray astronomy
Issue Date: 2004
Publisher: Springer Verlag
Abstract: 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.
Note: Versió postprint del document publicat a:
It is part of: Astronomy and Astrophysics, 2004, vol. 414, num. 1, p. L1-L4
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ISSN: 0004-6361
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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