TY - JOUR
T1 - Propagation, cocoon formation, and resultant destabilization of relativistic jets
AU - Matsumoto, Jin
AU - Masada, Youhei
N1 - Funding Information:
We thank H. R. Takahashi, A. Mizuta, S. Nagataki, M. A. Aloy, J. M. Martí, M. Perucho, S. S. Komissarov, and K. N. Gourgouliatos for their useful discussions. Numerical computations were conducted on Cray XC30 at the Center for Computational Astrophysics, National Astronomical Observatory of Japan and on Cray XC40 at YITP at Kyoto University. This work was supported in part by Research Institute of Stellar Explosive Phenomena at Fukuoka University and the Center for the Promotion of Integrated Sciences (CPIS) of Sokendai. This work was supported by JSPS KAKENHI Grants No. 18K03700, No. 18H04444, No. 18H01212 and No. 19K23443.
Publisher Copyright:
© 2019 The Author(s)
PY - 2019/12/1
Y1 - 2019/12/1
N2 - A cocoon is a by-product of a propagating jet that results from shock heating at the jet head. Herein, considering simultaneous cocoon formation, we study the stability of relativistic jets propagating through the uniform ambient medium. Using a simple analytic argument, we demonstrate that independent from the jet launching condition, the effective inertia of the jet is larger than that of the cocoon when the fully relativistic jet oscillates radially owing to the pressure mismatch between jet and cocoon. In such situations, it is expected that the onset condition for the oscillation-induced Rayleigh-Taylor instability is satisfied at the jet interface, resulting in the destabilization of the relativistic jet during its propagation. We have quantitatively verified and confirmed our prior expectation by performing relativistic hydrodynamic simulations in three dimensions. The possible occurrences of the Richtmyer-Meshkov instability, oscillation-induced centrifugal instability, and Kelvin-Helmholtz instability are also discussed.
AB - A cocoon is a by-product of a propagating jet that results from shock heating at the jet head. Herein, considering simultaneous cocoon formation, we study the stability of relativistic jets propagating through the uniform ambient medium. Using a simple analytic argument, we demonstrate that independent from the jet launching condition, the effective inertia of the jet is larger than that of the cocoon when the fully relativistic jet oscillates radially owing to the pressure mismatch between jet and cocoon. In such situations, it is expected that the onset condition for the oscillation-induced Rayleigh-Taylor instability is satisfied at the jet interface, resulting in the destabilization of the relativistic jet during its propagation. We have quantitatively verified and confirmed our prior expectation by performing relativistic hydrodynamic simulations in three dimensions. The possible occurrences of the Richtmyer-Meshkov instability, oscillation-induced centrifugal instability, and Kelvin-Helmholtz instability are also discussed.
KW - Galaxies: jets
KW - Instabilities
KW - Methods: numerical
KW - Relativistic processes
KW - Shock waves
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U2 - 10.1093/mnras/stz2821
DO - 10.1093/mnras/stz2821
M3 - Article
AN - SCOPUS:85079597925
SN - 0035-8711
VL - 490
SP - 4271
EP - 4280
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -