The ionosphere can be disturbed by the external energy sources. For example, there are ionospheric storms （ISs） which follow the interplanetary shock waves （ISWs） sweeping over the earth. It is not known what conn...The ionosphere can be disturbed by the external energy sources. For example, there are ionospheric storms （ISs） which follow the interplanetary shock waves （ISWs） sweeping over the earth. It is not known what connection exists between parameters of ISs and ISWs because of the complexity in the coupling chain from interplanetary space to ionosphere. In order to probe the unknown connection, the correlative study is carried out in this note by using the data of ISWs obtained by space vehicles near the earth’s orbit and the materials about the ionospheric f<sub>0</sub>F<sub>2</sub> in Manzhouli during 1966—1976.展开更多
The solar radio inverted-U bursts are named after their shape of an inverted letter Uon the spectrograph records.They are important in the study of the corona mass ejectionand particle acceleration in solar flares.Up ...The solar radio inverted-U bursts are named after their shape of an inverted letter Uon the spectrograph records.They are important in the study of the corona mass ejectionand particle acceleration in solar flares.Up to now,most U bursts occur at frequenciesbelow 0.5 GHz;only one exception was reported in the 1.1—1.7 GHz frequency band.Inthis note,we investigate a U burst in the 1.0-2.8 GHz frequency band(figs.1,2),展开更多
The solar radio spectra of the gyro-synchrotron radiation without absorption from mildly relativistic non-thermal electron have been presented using the model with the spherical symmetric nonhomogeneity.These spectra ...The solar radio spectra of the gyro-synchrotron radiation without absorption from mildly relativistic non-thermal electron have been presented using the model with the spherical symmetric nonhomogeneity.These spectra have the following features: (i) Twists and turns of the spectra,which appear at the joint between the medium and high frequencies,(ii) Flux density drop at the lower frequencies.Even if there are no absorption in the radio sources,flux density drop at the lower frequencies is still present because of magnetic nonhomogeneity.(iii) These theoretical spectra belong to C type.This provides us a new interpretation for the observed solar burst C type spectra.展开更多
文摘The ionosphere can be disturbed by the external energy sources. For example, there are ionospheric storms （ISs） which follow the interplanetary shock waves （ISWs） sweeping over the earth. It is not known what connection exists between parameters of ISs and ISWs because of the complexity in the coupling chain from interplanetary space to ionosphere. In order to probe the unknown connection, the correlative study is carried out in this note by using the data of ISWs obtained by space vehicles near the earth’s orbit and the materials about the ionospheric f<sub>0</sub>F<sub>2</sub> in Manzhouli during 1966—1976.
基金Project supported by the National Natural Science Foundation of China.
文摘The solar radio inverted-U bursts are named after their shape of an inverted letter Uon the spectrograph records.They are important in the study of the corona mass ejectionand particle acceleration in solar flares.Up to now,most U bursts occur at frequenciesbelow 0.5 GHz;only one exception was reported in the 1.1—1.7 GHz frequency band.Inthis note,we investigate a U burst in the 1.0-2.8 GHz frequency band(figs.1,2),
基金Project supported by the National Natural Science Foundation of China.
文摘The solar radio spectra of the gyro-synchrotron radiation without absorption from mildly relativistic non-thermal electron have been presented using the model with the spherical symmetric nonhomogeneity.These spectra have the following features: (i) Twists and turns of the spectra,which appear at the joint between the medium and high frequencies,(ii) Flux density drop at the lower frequencies.Even if there are no absorption in the radio sources,flux density drop at the lower frequencies is still present because of magnetic nonhomogeneity.(iii) These theoretical spectra belong to C type.This provides us a new interpretation for the observed solar burst C type spectra.
