Quasiperiodic Variations of Coronal Mass Ejections with Different Angular Widths

Coronal mass ejections (CMEs) are energetic expulsions of organized magnetic features from the Sun. The study CME quasi-periodicity helps establish a possible relationship between CMEs, solar flares, and geomagnetic disturbances. We used angular width CMEs as criterion for classifying in study. Based on 25 years observational data, we systematically analyzed quasi-periodic variations corresponding to occurrence rate different widths northern southern hemispheres, using frequency time-frequency analysis methods. There various periods widths: 9 months, 1.7 years, 3.3-4.3 years. Compared with previous studies based obtained same 1.2(+-0.01) 3.1(+-0.04) ~6.1(+-0.4) 1.2(+-0.1) 2.4(+-0.4) also found additional all that appear only one hemisphere or during specific cycle. For example, 7.1(+-0.2) months 4.1(+-0.2) hemisphere, 1(+-0.004) 5.9(+-0.2) 1(+-0.1) 1.4(+-0.1) 6.1(+-0.4) cycle 23 (SC23) 3.7(+-0.2) 24 (SC24). shows link among oscillations coronal activity, flare eruptions, interplanetary space.