Empirical model of the transit time of interplanetary coronal mass ejections |
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| Authors: | A Mahrous M El-Nawawy M Hammam N Ahmed |
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| Institution: | (1) Faculty of Science, Physics Department, Helwan University, Cairo, Egypt;(2) Faculty of Science, Astronomy Department, Cairo University, Cairo, Egypt |
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| Abstract: | We study the correlation between near-Earth observations of interplanetary coronal mass ejections (ICMEs) detected by the
Wind and ACE spacecrafts and their counterparts of coronal mass ejections (CMEs) observed near the Sun by the SOHO/LASCO coronagraph during
1996–2002. The results have been compared with an empirical model given by Gopalswamy, et al. (2000; 2001) to predict the
1-AU arrival time of CMEs. In this paper, we use an expected data set with a wider range with initial velocities than that
considered in previous models. To improve the accuracy of the predicted arrival time, we divided the CME events into two groups
according to their effective acceleration and deceleration. The results show that our model works well for events with a negative
acceleration in the initial velocity range between 500 and 2500 km/s, while the model described by Gopalswamy is better for
events with initial velocities near the solar wind velocity.
Published in Russian in Astronomicheskii Vestnik, 2009, Vol. 43, No. 2, pp. 137–144.
The text was translated by the authors. |
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| Keywords: | PACS" target="_blank">PACS 96 50 -e 96 50 Ci 96 50 Uv 96 60 ph |
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