Physics – Plasma Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29j..28m&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 10, pp. 28-1, CiteID 1390, DOI 10.1029/2002GL014865
Physics
Plasma Physics
9
Space Plasma Physics: Shock Waves, Space Plasma Physics: Numerical Simulation Studies, Solar Physics, Astrophysics, And Astronomy: Corona, And Astronomy: Flares
Scientific paper
We have examined a possibility for improvement of the STOA (Shock Time Of Arrival) model for interplanetary shock propagation. In the STOA model, the shock propagating velocity is given by Vs ~ R-N with N = 0.5, where R is the heliocentric distance. Noting observational and numerical findings that the radial dependence of shock wave velocity depends on initial shock wave velocity, we suggest a simple modified STOA model (STOA-2) which has a linear relationship between initial coronal shock wave velocity (Vis) and its deceleration exponent(N), N = 0.05 + 4 × 10-4Vis, where Vis is a numeric value expressed in units of km s-1. Our results show that the STOA-2 model not only removes a systematic dependence of the transit time difference predicted by the previous STOA model on initial shock velocity, but also reduces the number of events with large transit time differences.
Cho Kyung-Suk
Dryer Murray
Moon Yong Jae
Park Young-Deuk
Smith Zdenka
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