Co-existence of two plasma phases in solar and AGN coronas
| Autor: | Kubičela A., Arsenijević J., Popović L.Č., Trajković N., Bon E. |
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| Jazyk: | angličtina |
| Rok vydání: | 1998 |
| Předmět: | |
| Zdroj: | Serbian Astronomical Journal, Vol 1998, Iss 158, Pp 43-53 (1998) |
| Druh dokumentu: | article |
| ISSN: | 1450-698X 1820-9289 |
| DOI: | 10.2298/SAJ9858043K |
| Popis: | Here we have juxtaposed two distant cosmic locations of the Sun and AGN where neutral hydrogen appears in a close connection with hot coronas. Besides the solar photosphere, chromosphere and prominences where the presence of neutral hydrogen is well established, its emission quite high in hot solar corona is still puzzling. Some of earlier observations where Hα emission in solar corona was detected in eclipse and in daily coronagraphic observations are reviewed. A proper theoretical explanation of this cold chromospheric-type emission in the hot corona does not exist yet. On the other side, a similar emission of hydrogen lines is present in Active Galactic Nuclei (AGNs). Much research work is currently being done in this field. We outline some of the concepts of the AGN structure prevailing in the astrophysics today. |
| Databáze: | Directory of Open Access Journals |
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