Astronomical Observations and Laboratory Analogs of Shock Waves in Supersonic Collimated Jets From Young Stars

Details Astronomical Observations and Laboratory Analogs of Shock Waves in Supersonic Collimated Jets From Young Stars Astronomical Observations and Laboratory Analogs of Shock Waves in Supersonic Collimated Jets From Young Stars

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.6604h&link_type=abstract

American Astronomical Society, AAS Meeting #212, #66.04; Bulletin of the American Astronomical Society, Vol. 40, p.257

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Jets from young stars offer a rich environment for studying shock waves in collimated jets. These remarkable supersonic flows consist of multiple bow shocks which form in response to velocity perturbations. In at least two cases, jets deflect from obstacles located along the path of the flow and produce spectacular shocked wakes and shear. The hot gas behind the shocks in stellar jets radiates optically thin forbidden lines, from which one can measure turbulent line widths, densities, ionization fractions, and temperature, and even watch how the jets and shocks evolve in real time.
On the laboratory side, experiments at Omega, Magpie, and other laser facilities have begun to produce analogs of stellar jets, which, when appropriately scaled, have dimensionless fluid parameters similar to those present in the astrophysical flows. The laboratory experiments provide insights into several aspects of jets, including morphologies and time evolution of deflection shocks, dynamics of shocked material, and interactions between colliding winds. New experiments will probe the roles of clumps in defining the morphologies of jets, and will explore how magnetic fields influence the shock waves.
This talk summarizes recent observational developments that pertain to stellar jets, and outlines areas where laboratory experiments are most likely to improve our understanding of this fundamental astrophysical process.

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