ПИСЬМА В АСТРОНОМИЧЕСКИЙ ЖУРНАЛ, 2019, том 45, № 3, с. 210
ON THE ORIGIN OF SOLAR HALO CORONAL MASS EJECTIONS1
© 2019 г. V. K. Verma1,*, Nishant Mittal2,**
1Uttrakhand Space Application Center, 131 Vasant Vihar, Dehradun-248006, India
2Astrophysics Research Group, Dept. of Physics, Meerut College, Meerut- 250001, India
Received September 25, 2018; in final form, November 11, 2018; accepted November 28, 2018
We present an investigation of halo coronal mass ejections (HCMEs) to understand the origin of HCMEs
which is very important because HCMEs are regarded as main causes of heliospheric and geomagnetic
disturbances. In this study, we have investigated 313 HCMEs observed during 1996-2012 by LASCO,
coronal holes (CHs) and solar flares phenomena. On investigation of 313 HCMEs and related solar flares
and coronal holes data, we find that all 313 HCMEs were observed when there were CHs and solar flares
within 10◦ to 60◦. We also find that the 128 (40.8%) and 88 (23.6%) HCMEs events were observed when
there were CHs and solar flares within 10◦ and 20◦, respectively. The speed of HCMEs does not increase
with the increase of the area of CHs while the solar winds speed increases with increase of CHs area. We
are of the view that the HCMEs may have been produced by some mechanism, in which the mass ejected
by solar flares or active prominences, gets connected with the open magnetic lines of CHs (source of high
speed solar wind streams) and moves along them to appear as a HCMEs, earlier suggested by Verma and
Pande (1989) and Verma (1998, 2002). The various results obtained in the present analysis are discussed
in the light of existing scenario of heliospheric physics.
Key words: Sun, coronal mass ejections, solar flares, coronal holes, solar wind.
DOI: 10.1134/S0320010819030069
1Полная версия статьи публикуется в английской версии журнала (Astronomy Letters, v. 45, no. 4, 2019).
*E-mail: vkvermadr@gmail.com
**E-mail: nishantphysics@gmail.com
210