ACTIVE SOLAR REGIONS AND THEIR CORPUSCULAR EMISSION
A study is reported of the relation between absorption at high geomagnetic latitudes and disturbances in the earth's magnetic field, in connection with processes occurring in active solar regions. It is concluded from an analysis of experimental data that high-energy protons ( approximates 10-- 100 Mev) are produced on the sun. A consideration of the large delay in the arrival of the protons and the duration and isotropy of their precipitation into the polar cap, leads to the conclusion that approximately radial magnetic fields (with included irregularities) are present in interplanetary space. Their sources are the local magnetic fields of active regions and the general magnetic field of the sun, which are carried along by the ejected plasma. This conclusion is confirmed by the fact that a rapid arrival of protons from a flare is usually observed if the previous flare in the given region gave rise to a magnetic storm. This means that the protons are injected into an approximately radial magnetic field due to the local magnetic field of the active region, and carried along by the previously ejected plasma. The several prolonged polar cap absorptions during 1957-- 1959 are explained by the injection into this field of high-energy protons associated with the development of flares, the protons being produced within the given active region during its passage across the solar disc. Since the magnetic field remains associated with the sun, the rotation of the sun tends to bend the magnetic lines of force even at the distance of 1 A.U. This is confirmed by the difference in the arrival delay time of high-energy protons injected from active regions located on the west and east hemispheres of the sun. It is established that magnetic storms with SC, which are due to the injection of solar plasma during the development of chromospheric flares and are accompanie by the generation of high-energy protons, have as a rule a shorter delay time, a larger SC amplitude, and are accom panied by a larger Forbush decrease in the intensity of galactic cosmic radiation. A relation is found between the intensity of magnetic storms and the coordinates of flares Using the flare-storm identification, it is shown that a disturbance from the sun is propagated very nearly throu a complete hemisphere, the main mass of the stream'' being concentrated in a 60 deg cone. (auth)
- Research Organization:
- Crimean Astrophysical Observatory, Academy of Sciences, USSR
- NSA Number:
- NSA-17-013275
- OSTI ID:
- 4753049
- Journal Information:
- Soviet Astron. AJ (English Transl.), Journal Name: Soviet Astron. AJ (English Transl.) Vol. Vol: 5
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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