NDLI: Study of cosmic ray intensity and geomagnetic storms with solar wind parameters during the period 1998

Content Provider	Springer Nature Link
Author	Kharayat, Hema Prasad, Lalan
Copyright Year	2016
Abstract	The aim of this paper is to study the effect of solar wind parameters (solar wind speed $V$ , plasma flow pressure, and plasma density) on cosmic ray intensity and on geomagnetic storms for the period 1998–2005 (solar cycle 23). A Chree analysis by the superposed epoch method has been done for the study. From the present study we have found that the solar wind speed is a highly effective parameter in producing cosmic ray intensity decreases and geomagnetic storms. No time lag is found between cosmic ray intensity decreases, geomagnetic storms, and peak value of solar wind speed. Further, we have found that the plasma flow pressure is effectively correlated with geomagnetic storms but it is weakly correlated with cosmic ray intensity. The cosmic ray intensity and geomagnetic storms are found to be weakly correlated with plasma density. The decrease in cosmic ray intensity and geomagnetic storms takes place one day after the peak values of plasma flow pressure and plasma density. There is a time lag of one day between solar wind parameters (plasma flow pressure and plasma density) and cosmic ray intensity decrease, geomagnetic storms. Also, we have found a high correlation of cosmic ray intensity and geomagnetic storms with the product of interplanetary magnetic field $B$ and solar wind speed $V$ i.e. $B\cdot V$ . This study may be useful in predicting the space-weather phenomena.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISSN	0004640X
Journal	Astrophysics and Space Science
Volume Number	362
Issue Number	1
e-ISSN	1572946X
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-12-22
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cosmic rays Magnetic storms Solar wind plasma Astrophysics and Astroparticles Astronomy, Observations and Techniques Cosmology Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) Astrobiology
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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