Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...707l...6r&link_type=abstract
The Astrophysical Journal Letters, Volume 707, Issue 1, pp. L6-L11 (2009).
Astronomy and Astrophysics
Astronomy
10
Circumstellar Matter, Ism: Herbig-Haro Objects, Ism: Jets And Outflows, Planetary Nebulae: General
Scientific paper
Models of accretion disks around a star in a binary system predict that the disk will have a retrograde precession with a period a factor of ~10 times the orbital period. If the star+disk system ejects a bipolar outflow, this outflow will be subject to the effects of both the orbital motion and the precession. We present an analytic, ballistic model and a three-dimensional gasdynamical simulation of a bipolar outflow from a source in a circular orbit, and with a precessing outflow axis. We find that this combination results in a jet/counterjet system with a small spatial scale, reflection-symmetric spiral (resulting from the orbital motion) and a larger-scale, point-symmetric spiral (resulting from the longer period precession). These results provide interesting possibilities for modeling specific Herbig-Haro jets and bipolar planetary nebulae.
Cantó Jorge
Esquivel Alejandro
Haro-Corzo Sinhue
Raga Alejandro C.
Riera Arnau
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