NDLI: Numerical study of the adiabatic index effect for the Vishniac instability in supernova remnants

Content Provider	Springer Nature Link
Author	Cavet, C. Michaut, C. Roy, F. Nguyen, H. C. Bouquet, S. Sauty, C.
Copyright Year	2011
Abstract	The Vishniac instability is supposed to explain the fragmentation of the thin shell of shocked matter in the radiative phase of supernova remnants. However its implication and its consequence on the morphological evolution of stellar systems is not fully demonstrated. The present paper tackles this subject by numerical simulations and focus on the role of the adiabatic index in the instability growth. The HYDRO-MUSCL 2D hydrodynamics code has been used to simulate the evolution of a supernova remnant thin shell and the triggering of the Vishniac instability in this thin shell. We have studied the temporal behavior of the perturbation. The first result of the numerical study is the existence of the Vishniac instability in the simulations. This result is proved by the overstability process observed in the simulations as predicted by the theoretical analysis. The second important result is the damping of the perturbation at late evolution and for all the set of parameters. Indeed the accretion of matter onto the shock damps the instability when theoretical analysis predicts its occurrence.
Starting Page	183
Ending Page	187
Page Count	5
File Format	PDF
ISSN	0004640X
Journal	Astrophysics and Space Science
Volume Number	336
Issue Number	1
e-ISSN	1572946X
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-04-20
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Vishniac instability Radiative blast waves Supernova remnants Hydrodynamics Astronomy, Observations and Techniques
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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