Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
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LINEAR ANALYSIS OF PARKER-JEANS INSTABILITY WITH COSMIC-RAY

  • KUWABARA TAKUHITO (Department of Physics, Faculty of Science, Chiba University) ;
  • KO CHUNG-MING (Department of Physics, Institute of Astronomy and Center for Complex Systems, National Central University)
  • Published : 2004.12.01
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Abstract

We present the results of the linear analysis for the Parker-Jeans instability in the magnetized gas disks including the effect of cosmic-ray diffusion along the magnetic field lines. We adopted an uni-formly rotating two temperature layered disk with a horizontal magnetic fields and solved the perturbed equations numerically. Fragmentation of gases takes place and filamentary structures are formed by the growth of the instability. Nagai et al. (1998) showed that the direction of filaments being formed by the Parker-Jeans instability depends on the strength of pressure outside the unperturbed gas disk. We found that at some range of external pressures the direction of filaments is also governed by the value of the diffusion coefficient of CR along the magnetic field lines k.

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References

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Cited by

  1. Gravitational Instability in Radiation Pressure–Dominated Backgrounds vol.684, pp.1, 2008, https://doi.org/10.1086/589227