Comparative study of bow shock models using Wind and Geotail observations

Details Comparative study of bow shock models using Wind and Geotail observations Comparative study of bow shock models using Wind and Geotail observations

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgra..108.1464d&link_type=abstract

Journal of Geophysical Research, Volume 108, Issue A12, pp. SMP 24-1, CiteID 1464, DOI 10.1029/2003JA010027

Physics

7

Interplanetary Physics: Planetary Bow Shocks, Magnetospheric Physics: Magnetosheath, Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Instruments And Techniques

Scientific paper

Wind and Geotail observed bow shock (BS) crossings were selected from the 1998 to 2001 ISTP database. We analyzed 625 case events containing 4381 Geotail BS crossings and 130 case events containing 917 Wind BS crossings. The location of the BS crossings, in the aberrated GSE coordinate system, varied over a wide range from -85 Re to 45 Re along the X-GSE axis, up to 90 Re in the perpendicular direction. ACE, Wind, and Geotail measurements were used to determine the upstream solar wind conditions in the interplanetary medium. These conditions were determined for the BS crossings in each case event by using the delay time of direct solar wind propagation from an upstream monitor to the probe satellite (Wind or Geotail). The solar wind conditions for the BS crossings varied over a wide range of dynamic pressures Pd (from 0.02 nPa to 49 nPa), IMF Bzs (from -26 nT to 23 nT), thermal/magnetic pressure ratios β (from 0.002 to 50), and magnetosonic Mach numbers Mms (from 1.02 to 29). Such a wide spatial and dynamic range of BS crossings permits us to consider the different parameters that control the BS size and shape, such as the radius of curvature of the magnetopause which depends on Pd and Bz, the Alfven, sonic, and magnetosonic Mach numbers, and the IMF orientation. To study the dependence on these parameters, we compared the accuracy of the BS models formulated by Peredo et al. [1995], Russell and Petrinec [1996], Verigin et al. [2001b], and Chao et al. [2002] for the prediction of selected BS crossings observed in different bow shock regions and with various upstream solar wind conditions. It was found that the Chao et al. [2002] model had the best capability for predicting the BS crossings. The solar wind dynamic pressure and magnetosonic Mach number were determined to be the most important parameters controlling the BS size and shape. The important role of the dawn-dusk asymmetry of the bow shock tail region is emphasized. The effect of the southward IMF influence on the dayside magnetosheath thickness is revealed and discussed.

Affiliated with

Also associated with

No associations

Rating

Comparative study of bow shock models using Wind and Geotail observations 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 Comparative study of bow shock models using Wind and Geotail observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparative study of bow shock models using Wind and Geotail observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-882785