Laboratory Investigation of Astrophysical Collimated Jets with Intense Lasers
One of the remarkable dynamic features of the Herbig-Haro (HH) object is its highly collimated propagation far away from the accretion disk. Different factors are proposed to give us a clearly physical explanation behind these fascinating phenomena, including magnetic field, radiation cooling, surro...
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Published in | The Astrophysical journal Vol. 860; no. 2; pp. 146 - 152 |
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Main Authors | , , , , , , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Philadelphia
The American Astronomical Society
20.06.2018
IOP Publishing |
Subjects | |
Online Access | Get full text |
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Summary: | One of the remarkable dynamic features of the Herbig-Haro (HH) object is its highly collimated propagation far away from the accretion disk. Different factors are proposed to give us a clearly physical explanation behind these fascinating phenomena, including magnetic field, radiation cooling, surrounding medium, and so on. Laboratory astrophysics, as a new complementary method of studying astrophysical issues, can provide an insight into these behaviors in a similar and controllable laboratory environment. Here we report the scaled laboratory experiments that a well-collimated radiative jet with high Mach number is successfully created to mimic the evolution of HH objects. According to our results, we find that the radiation cooling effect within the jet and the outer rare surrounding plasmas from the X-ray (>keV) photoionized target contribute to the jet collimation. The local nonuniform density structures along the collimated radiative jet axis are caused by the pressure competition between the inner jet and the outer plasmas. The corresponding simulations performed with radiation-hydrodynamic codes FLASH reveal how the radiative jet evolves. |
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Bibliography: | AAS06470 Instrumentation, Software, Laboratory Astrophysics, and Data |
ISSN: | 0004-637X 1538-4357 |
DOI: | 10.3847/1538-4357/aac3d5 |