We present here new observations conducted with the EVN and MERLIN of the persistent microquasar LS 5039 discovered by Paredes et al. (2000) with the VLBA. The new observations confirm the presence of an asymmetric two-sided jet reaching up to ∼ 1000 AU on the longest jet arm. The results suggest a bending of the jets with increasing distance from the core and/or precession. The origin and loca...

Very high energy (VHE) γ-rays have recently been detected from the Galactic black-hole candidate and microquasar LS 5039. A plausible site for the production of these VHE γ-rays is the mildly relativistic outflow close to the base of the jet. However, at distances comparable to the binary separation, the intense photon field of the stellar companion will lead to substantial γγ absorption of VHE...