Resumo

GONZALEZ, R. F.  e  RAGA, A. C.. Herbig-Haro jets from sources in elliptical orbits. Rev. mex. astron. astrofis [online]. 2004, vol.40, n.1, pp.61-67. ISSN 0185-1101.

In this paper, we study the kinematical evolution of a HH (Herbig-Haro) jet produced in a binary stellar system in which the jet source is movingin an elliptical orbit around a stellar companion. An anlytical model describing the motion of a ballistic jet is presented, showing diverse morphologies obtained for dierent ellipticities of the orbital motion. In addition, we have carried out a 3D hydrodynamical simulation of a radiative jet from a stellar source moving along a high-ellipticiy orbit. A comparison between the numerical simulations and the analytical model shows that the main deviations between them occur in the leading bow-shock and in the regions in which the jet beam has its larger deviations from the orbital axis, as a result of the interaction between the jet and the environment. Finally, we present the Hα intensity maps predicted from our numerical simulation, and discuss the observational properties expected for HH objects ejected from stars in elliptical orbits.

Palavras-chave : ISM [Herbig-Haro objects]; ISM [Jets and out-flows]; ISM [Kinematics and dynamics].