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| Article Name : | | | A STUDY OF AZIMUTHAL MODULATIONS OF THE SOLAR WIND INFLUENCE OF MAGNETIC FIELD | | Author Name : | | | A.K.RAY, S.P.DUBEY AND B. K. PANDEY | | Publisher : | | | Ashok Yakkaldevi | | Article Series No. : | | | GRT-2501 | | Article URL : | |  | Author Profile View PDF In browser | | Abstract : | | | In this paper, we study the evolution of azimuthal modulation of the solar wind with magnetic field. The evolution of azimuthal modulation of the solar wind is examined by numerical integration of the basic equations governing supersonic, super-Alfvenic , polytrophic one fluid flow in the equatorial plane of the Sun with radial as well as azimuthal magnetic fields . The numerical model is based on pseudo-conservative form of two dimensional time dependent system. The computations are started by introducing various sets of finite amplitude perturbations stationary with respect to the Sun. It is shown that for a properly chosen set of simultaneous perturbations of the radial velocity and temperature, quantitative agreement with the averaged observational results at 1AU can be obtained, including the advance of the density modulation with respect to those of velocity and temperature. It is further shown that modulations at 1AU depends on the relative azimuthal positions between the Sun and Earth. | | Keywords : | | - finite amplitude perturbations,
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