TURBULENCE AND MAGNETIC FIELD AMPLIFICATION IN SUPERNOVA REMNANTS: INTERACTIONS BETWEEN A STRONG SHOCK WAVE AND MULTIPHASE INTERSTELLAR MEDIUM

By Tsuyoshi Inoue, R. Yamazaki, S. Inutsuka. 2009

150 citations recorded by the source corpus.

We examine magnetohydrodynamic simulations of the propagation of a strong shock wave through the interstellar two-phase medium composed of small-scale cloudlets and diffuse warm neutral medium in two-dimensional geometry. The preshock two-phase medium is provided as a natural consequence of the thermal instability that is expected to be ubiquitous in the interstellar medium. We show that the shock-compressed shell becomes turbulent owing to the preshock density inhomogeneity, and magnetic field amplification takes place in the shell. The maximum field strength is determined by the condition that plasma β ∼ 1, which gives the field strength on the order of 1 mG in the case of shock velocity ∼103 km s−1. The strongly magnetized region shows filamentary and knotlike structures in two-dimensional simulations. The spatial scale of the regions with a magnetic field of ∼1 mG in our simulation is roughly 0.05 pc, which is comparable to the spatial scale of the X-ray hot spots recently discovered in supernova remnants where the magnetic field strength is indicated to be amplified up to the order of 1 mG. This result may also suggest that the turbulent region with a locally strong magnetic field is expected to be spread out in the region with frequent supernova explosions, such as in the Galactic center and starburst galaxies.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/26a3ea03a382ea5ec3d9c7089f83e95ac472b6ae

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In Astronomy and Astrophysics

1. P. Hennebelle
2. E. Falgarone
3. Tsuyoshi Inoue
4. Y. Fukui
5. S. Inutsuka
6. T. W. Jones
7. R. Yamazaki
8. Hyesung Kang

In Nuclear and High Energy Physics

1. Y. Fukui
2. Tsuyoshi Inoue
3. S. Inutsuka
4. T. W. Jones
5. Hyesung Kang
6. Y. Ohira
7. D. Ryu
8. P. Hennebelle

Citations in the corpus

• TOWARD UNDERSTANDING THE COSMIC-RAY ACCELERATION AT YOUNG SUPERNOVA REMNANTS INTERACTING WITH INTERSTELLAR CLOUDS: POSSIBLE APPLICATIONS TO RX J1713.7−3946 (2011, result): “This is consistent with the previous simulations performed in limited two-dimensional geometry (Inoue et al. 2009).”
• FORMATION OF MASSIVE MOLECULAR CLOUD CORES BY CLOUD–CLOUD COLLISION (2013, background): “…wave and upstream density fluctuations in the astrophysics, e.g., Kornreich & Scalo (2000); Gicalone & Jokipii (2007); Kevlahan & Pudritz (2009); Inoue et al. (2009, 2012); Inoue & Inutuska (2012) Lo g ( n [ orientation of density weighted magnetic field projected onto the y-z plane, indicating…”
• Gamma-rays from molecular clouds illuminated by cosmic rays escaping from interacting supernova remnants (2010, background): “…and many numerical simulations (Lucek & Bell 2000; Giacalone & Jokipii 2007; Niemiec et al. 2008; Reville et al. 2008; Riquelme & Spitkovsky 2009; Inoue et al. 2009; Ohira et al. 2009a; Vladimirov et al. 2009), the saturation of the magnetic-field amplification and the diffusion coefficient has…”
• DIFFUSIVE SHOCK ACCELERATION SIMULATIONS OF RADIO RELICS (2012, background): “In addition, magnetic fields can be amplified by turbulent motions behind shocks (Giacalone & Jokipii 2007; Inoue et al. 2009).”
• Turbulent molecular clouds (2012, background): “…Sánchez–Salcedo et al. 2002, Audit & Hennebelle 2005, 2010, Heitsch et al. 2005, 2006, Vázquez–Semadeni et al. 2006, Hennebelle & Audit 2007), or by shocks propagating in the WNM (Koyama & Inutsuka 00, 02, Inoue et al. 2009) or by turbulent driving in the Fourier space (Seifreid et al. 2011).”