17:15 〜 19:15
[PEM10-P02] Statistical study of prominence eruptions observed with Nobeyama Radioheliograph
キーワード：プロミネンス噴出、太陽活動周期、電波観測
Nobeyama Radioheliograph (NoRH) has a capability to track the continuum radio emissions from an erupted prominence to the high-altitude corona without being affected by the Doppler shift that occurs in Hα line observations. Shimojo (2013) conducted a statistical study on the change in the latitude of occurrence relative to the solar activity cycle using NoRH data up to 2013. We extended this study using all the NoRH data from 1992 to 2020 and found the similar variation after 2013.
Next, we derived the velocity of prominence eruptions observed with NoRH. In the previous studies, Yashiro et al. (2020) analyzed prominence eruptions observed with SOD/AIA and found that the velocity of the prominence eruptions occurring at high-latitude (>60 degree) decreased with weakening of the polar magnetic field in the rising phase of the solar cycle. Using a longer dataset (1992-2020) of NoRH, we investigated the velocity variation of high-latitude eruptions. Then, we confirmed the tendency of the results reported by Yashiro et al. (2020).
In this presentation, we discuss about these analysis results and interpret them.
References:
Shimojo, M., Unusual Migration of Prominence Activities in the Southern Hemisphere during Cycles 23–24, PASJ, 65, S16, 2013.
Yashiro, S., N. Gopalswamy, S. Akiyama, and P. A. Mäkelä, A catalog of prominence eruptions detected automatically in the SDO/AIA 304Å data, J. of Atmospheric and Solar-Terrestrial Physics, 205, 105324, 2020.
Next, we derived the velocity of prominence eruptions observed with NoRH. In the previous studies, Yashiro et al. (2020) analyzed prominence eruptions observed with SOD/AIA and found that the velocity of the prominence eruptions occurring at high-latitude (>60 degree) decreased with weakening of the polar magnetic field in the rising phase of the solar cycle. Using a longer dataset (1992-2020) of NoRH, we investigated the velocity variation of high-latitude eruptions. Then, we confirmed the tendency of the results reported by Yashiro et al. (2020).
In this presentation, we discuss about these analysis results and interpret them.
References:
Shimojo, M., Unusual Migration of Prominence Activities in the Southern Hemisphere during Cycles 23–24, PASJ, 65, S16, 2013.
Yashiro, S., N. Gopalswamy, S. Akiyama, and P. A. Mäkelä, A catalog of prominence eruptions detected automatically in the SDO/AIA 304Å data, J. of Atmospheric and Solar-Terrestrial Physics, 205, 105324, 2020.