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Zodiacal cloud:


Project for James Webb Space Telescope (JWST, former NGST).
Customer: Goddard Space Flight Center/NASA, Greenbelt, MD.

      Team of our scientists together with Dr. John Mather (Senior Project Scientist for JWST) developed a 3D physical model of the zodiacal cloud incorporating the real dust sources of asteroidal, cometary, and TNOs origin, which makes it possible to evaluate quantitatively the zodiacal light emission and scatterings throughout the Solar system. A developed physical model of the zodiacal cloud fits the COBE data with an average error of 0.85% and explains the available data of Pioneer and Voyager dust detectors that show approximately constant flux up to 50 AU. Most our results was compiled by L.Ozernoy in his detailed review Physical Modeling of the Zodiacal Dust Cloud in The Extragalactic Infrared Background and its Cosmological Implications, IAU Symp.204, ASP, 2001, Eds. M.Harwitt & M.G.Hauser, p.17-34 which is available here.

Asteroidal dust


      A 3D model of dust density presents a 3D-grid containing 2106 cells. Using a new numerical approach to the dynamics of minor bodies and dust particles, we increase the number of particles positions employed in each model to 1011 without using a supercomputer. We compute its thermal emission and scattering at several wavelengths (1.25, 5, and 20 microns) as a function of James Webb Space Telescope location assumed to be at 1 AU or 3 AU. Areas on the sky with a minimum of zodiacal light are determined (see picture for sample).

References:


Gorkavyi, N., Ozernoy, L., Mather, J. & Taidakova, T. "The NGST and the zodiacal light in the Solar system". In "The NGST Science and Technology Exposition" Eds. Eric P. Smith and Knox Long. ASP, 2000, v.207, p.462-467.
Available here.

Gorkavyi, N.N., Ozernoy, L.M., Mather, J.C. & Taidakova, T. "Structure of the Zodiacal Cloud: New Analytical and Numerical Solutions". Earth, Planets and Space, 1998, v.50, p.539-544.

Gorkavyi, N.N., Ozernoy, L.M., Mather, J.C. & Taidakova, T.A. "Quasi-stationary States of Dust Flows Under Poynting-Robertson Drag: New Analytical and Numerical Solutions" ApJ, v. 488, Oct. 10, 1997, p.268-276.
Available here.

Gorkavyi, N.N., Ozernoy, L.M., & Mather, J.C. "A New Approach to Dynamical Evolution of Interplanetary Dust due to Gravitational Scattering". 1997, ApJ 474, N.1, p.496-502.

Gorkavyi, N.N, Ozernoy, L.M., & Mather, J.C. "Dynamical Evolution of Interplanetary Dust due to Gravitational Scattering by Jupiter and the Inner Planets". In "Physics, Chemistry, and Dynamics of Interplanetary Dust", Eds. Bo A.S. Gustafson & Martha S. Hanner, ASP, v.104, 1996, p.43-46.

 
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