Astrophysics and Space Science

, Volume 205, Issue 2, pp 297–303 | Cite as

An explanation for time dependent variability of the solar dust ring

  • Syuzo Isobe
  • Ambadi Satheesh Kumar


There are several observations showing an enhancement of infrared emission and optical polarization at a distance of 4R, (R is the angular radius of the Sun) implying a ring of dust in near-ecliptic orbit about the Sun; but there is an almost equal number of observations, which do not show any such enhancement. We plotted the observational results for the detection and the non-detection of the circum-solar dust on a diagram for the variation of the sun-spot number with time, and found that its detection and non-detection occurred near the solar minimum and maximum phases, respectively. We present the possibility that this phenomena is caused by an additional process, i.e., the Lorentz force acting on a charged dust particle. Since, at the maximum phase a dust particle in a near-solar region acquires a higher positive potential, and the solar magnetic field is very strong, the Lorentz force becomes dominant and can affect the orbit of the dust particle.


Dust Dust Particle Lorentz Force Positive Potential Additional Process 
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Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • Syuzo Isobe
    • 1
  • Ambadi Satheesh Kumar
    • 1
  1. 1.National Astronomical ObservatoryMitaka, TokyoJapan

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