Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jgra..107.1019v&link_type=abstract
Journal of Geophysical Research (Space Physics), Volume 107, Issue A2, pp. SSH 2-1, CiteID 1019, DOI 10.1029/2001JA000120
Astronomy and Astrophysics
Astrophysics
26
Interplanetary Physics: Solar Wind Plasma, Interplanetary Physics: Ejecta, Driver Gases, And Magnetic Clouds, Solar Physics, Astrophysics, And Astronomy: Coronal Mass Ejections, And Astronomy: Prominence Eruptions
Scientific paper
A simple semi-empirical model for the motion of interplanetary ejecta is proposed to advance the prediction of their arrival times at Earth. It is considered that the driving force and the gravity are much smaller than the aerodynamic drag force. The interaction with the ambient solar wind is modeled using a simple expression for the acceleration $[\dot \upsilon \]$ = -γ(υ-w), where w = w(R) is the distance-dependent solar wind speed. It is assumed that the coefficient γ decreases with the heliocentric distance as γ = αR-β, where α and β are constants. The equation of motion is integrated numerically to relate the Earth transit time and the associated in situ velocity with the velocity of coronal mass ejection. The results reproduce well the observations in the whole velocity range of interest. The model values are compared with some other models in which the interplanetary acceleration is not velocity dependent, as well as with the model where the drag acceleration is quadratic in velocity $\[\dot \upsilon \]$ = -γ2(υ - w)|υ - w|.
Gopalswamy Nat
Vrsnak Bojan
No associations
LandOfFree
Influence of the aerodynamic drag on the motion of interplanetary ejecta does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Influence of the aerodynamic drag on the motion of interplanetary ejecta, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Influence of the aerodynamic drag on the motion of interplanetary ejecta will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1108281