The correlations of ions density with geomagnetic activity and solar dynamic pressure in cusp region

• 作 者: A.FAZAKERLEY H.RèME I.DANDOURAS E.LUCEK
• 机 构: MSSL University College London Holmbury St. Mary Dorking RH5 6NT UK,CESR Toulouse 31028 France,CESR
• 出 处: Chinese Science Bulletin
• 发表日期: 2007年07期
• 关键词: scatter Figure have outflow Bulletin Correlation Polar averaged shadow traces

A statistical study of the properties of ions (O+, He+ and H+) measured by the Cluster-II in cusp region as a function of the solar wind dynamic pressure and geomagnetic index Kp respectively was made dur-ing the summer and fall of 2001-2003. The main results are that: (1) O+ ion density responds in a sig-nificant way to geomagnetic index Kp, and He+ ion density is not correlated with geomagnetic index Kp, both of them have a significant positive correlation with solar wind dynamic pressure; (2) H+ ion density is also observed to increase with solar wind dynamic pressure, and not correlated with geomagnetic index Kp.

A statistical study of the properties of ions (O +, He + and H +) measured by the Cluster-II in cusp region as a function of the solar wind dynamic pressure and geomagnetic index Kp was was dur-ing the summer and fall of 2001- 2003. The main results are that: (1) O + ion density responds in a sig-nificant way to geomagnetic index Kp, and He + ion density is not correlated with geomagnetic index Kp, both of them have a significant positive correlation with solar wind dynamic (2) H + ion density is also observed to increase with solar wind dynamic pressure, and not correlated with geomagnetic index Kp.