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Deep learning-based prediction of CME-driven shock standoff distances in metric type II radio emissions

Elsaid, Ahmed; Mahrous, Ayman; Hamada, Amr +1 more

Type II radio emissions are events mostly found to be associated with coronal mass ejections (CMEs) and accelerated by the CME-driven shock in the heliosphere. This study reports on the estimation of the CME-shock standoff distance at the commencement of metric type II radio emissions by combining the CME-deprojected speed and spectral features of…

Tracing shock waves: type II radio emission on 27th of September 2001

Al-Hamadani, Firas; Al-Sawad, Amjad

This study focus on atypical Type II radio bursts observed in conjunction with three simultaneous coronal mass ejections (CMEs) on September 27, 2001. These CMEs originated from a single active region (AR) and were linked to relatively weak solar flares. Analysis of the CME sequences revealed distinct periods of interplanetary (IP) Type II radio e…

Perturbation effect of solar radiation pressure on the Sun-Earth co-orbital motion

Zhao, Mingxu; Qi, Yi; Qiao, Dong

Sun-Earth co-orbital motions have an important value in deep space explorations due to their unique orbital characteristics and spatial configurations. In this paper, we investigate the influence of the solar radiation pressure (SRP) on the Sun-Earth co-orbital motion. Firstly, we derive several analytical formulas of the effect of the SRP on orbi…

Investigations on halo coronal mass ejections, sunspots and their geoeffectiveness in the rising phase of the solar cycle 25

Mujiber Rahman, A.; Kubera Raja, A.

In this research paper we investigated the halo coronal mass ejections and sunspot number during the period December 2019 to December 2023 for the rising phase of solar cycle 25. The SOHO/LASCO instrument observed 145 HCMEs during this period. We selected 145 halo CMEs and the associated flares, SSN and Dst. The HCME is found to be significantly f…